{ "data": { "a": { "slug": "gradium-voice-cloning", "name": "Gradium Voice Cloning and Voice Design", "vendor": "Gradium SAS", "vendorUrl": "https://gradium.ai", "kind": "model", "category": "voice-cloning", "summary": "Gradium's voice API creates a custom voice from an uploaded audio sample of about 10 seconds, or designs one from a written description, for its text-to-speech models in English, French, German, Spanish and Portuguese.", "url": "https://www.anchorterminal.com/tools/gradium-voice-cloning", "markdownUrl": "https://www.anchorterminal.com/tools/gradium-voice-cloning.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gradium-voice-cloning.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gradium-voice-cloning.json", "dns": "gradium-voice-cloning.grade.anchorterminal.com", "repo": "https://github.com/gradium-ai/gradium-py", "license": "Proprietary service under Gradium's Terms of Service (version of 19 October 2026). The `gradium` Python SDK is on PyPI", "transports": [ "http", "websocket" ], "remoteUrl": "https://api.gradium.ai/api/voices/", "packages": [ { "registry": "pypi", "name": "gradium" } ], "auth": "api-key", "authNotes": "API key from Gradium Studio sent in the `x-api-key` header, after a browser signup. Keys belong to an organisation and can be revoked or expire. No scopes or read-only keys were found in the docs.", "pricing": "freemium", "pricingNotes": "Creating a clone uses no credits in the docs and counts against the custom-voice allowance, 5 on the free plan and 1,000 on paid plans. Speech costs 1 credit a character. Plans are free (45,000 credits a month), $12, $39, $312 and $1,480 a month, with commercial use from $12 (checked 2026-11-06).", "priceSummary": "$12 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, llms.txt, OpenAPI or pricing page (checked 2026-11-06).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.gradium.ai/guides/voices/custom-voices", "llmsTxt": "https://docs.gradium.ai/llms.txt", "openapi": "https://docs.gradium.ai/api-reference/openapi.json", "capabilities": [ "voice.clone", "voice.design", "speech.tts" ], "tags": [ "hosted", "official", "freemium", "free-tier", "no-card", "closed-source", "python", "openapi", "llms-txt", "websocket", "status-page", "soc2", "iso27001", "data-residency", "eu" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 60.8, "grade": "C", "agentReady": false, "rank": 637, "ranked": true, "rankOf": 1486, "categoryRank": 6, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 70, "payments": 30, "reliability": 63, "schema": 83, "security": 48, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "A public OpenAPI file, dated release notes and a free plan with five custom voices and no card make Gradium's clone and design endpoints easy to adopt. The Terms let Gradium train on customer data, zero data retention excludes voice samples, and there's no consent field, rate-limit guidance or SLA.", "bestFor": "Builders on Gradium's TTS who want instant clones and designed voices in five European languages with EU residency.", "strengths": [ "Public OpenAPI 3.1 file covering cloning, voice design, enhancement and localisation", "Free plan with 45,000 credits a month, 5 custom voices and no card required", "Voice Design returns 1 to 5 candidates from a description, kept 30 days until one is saved", "SOC 2 Type II and ISO 27001:2022 audited by A-LIGN, with EU and US data residency", "Release notes dated per entry, the newest on 6 November 2026" ], "weaknesses": [ "The Terms grant Gradium a licence to train its models on Client Data, and zero data retention excludes voice samples", "No consent or verification field in the clone API, and no watermark found", "No 429, Retry-After or backoff guidance, and no SLA", "Synthesis errors come back as plain-text HTTP 500 bodies to parse", "Commercial use needs a paid plan, and only a Python SDK is published" ], "agentNotes": [ "Send `language` on every clone. It's required and must be one of en, fr, de, es or pt and match the recording", "Clones are enhanced by default since 23 October 2026. Pass `enhance=false` to keep the raw voice, then check `enhance` on GET", "Pass a clone as `voice_id` in TTS, not `voice`", "On a non-2xx synthesis reply, parse the `error from server \u003ccode\u003e` prefix; 1008 means a bad or revoked key", "Check the custom-voice allowance first. The free plan holds 5 voices shared by clones and designs" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.8 } ], "editorialScores": { "ergonomics": 67, "maintenance": 70, "payments": 30, "reliability": 63, "schema": 83, "security": 48, "transparency": 52 }, "provenanceScore": 74, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "pip install gradium", "http": "curl -X POST https://api.gradium.ai/api/voices/ \\\n -H \"x-api-key: $GRADIUM_API_KEY\" \\\n -F \"audio_file=@my_voice_sample.wav\" \\\n -F \"name=My Custom Voice\" \\\n -F \"language=en\"" }, "letme": { "capability": "https://letme.dev/voice.clone", "tool": "https://letme.dev/gradium-voice-cloning" }, "area": "voice", "unitPrices": [ { "item": "XS plan", "unit": "month", "usd": 12, "note": "225,000 credits, commercial use, 1,000 custom voices" }, { "item": "S plan", "unit": "month", "usd": 39, "note": "900,000 credits, zero data retention" }, { "item": "M plan", "unit": "month", "usd": 312, "note": "9 million credits, 5 pro voice clones" }, { "item": "L plan", "unit": "month", "usd": 1480, "note": "45 million credits, 20 pro voice clones" } ], "provenance": { "legalEntity": "Gradium SAS", "domain": "gradium.ai", "domainRegistered": "2025-03-04", "endpointOnVendorDomain": true, "terms": "https://gradium.ai/terms-of-service", "privacy": "https://gradium.ai/privacy", "statusPage": "https://gradium.statuspage.io", "changelog": "https://docs.gradium.ai/guides/release-notes", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The Terms of Service, version of 19 October 2026, are with Gradium SAS, Paris trade register 989 284 955. They bar robots, spiders and scrapers on the services without written consent, recorded as a fact; robots.txt on gradium.ai allows ClaudeBot and anthropic-ai, and docs.gradium.ai sets `Content-Signal: ai-train=yes, search=yes, ai-input=yes`.", "gradium.statuspage.io is an Atlassian Statuspage with a Voice Cloning component. Its robots.txt disallows /api/, so history was read from /history and the RSS feed.", "gradium.ai/.well-known/security.txt returns 404. The security page names security@gradium.ai and a trust centre at trust.gradium.ai.", "RDAP gives gradium.ai a registration date of 4 March 2025. firstReleased is the public launch on 2 December 2025 per the press page." ], "score": 74 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/gradium-voice-cloning.json", "live": { "slug": "gradium-voice-cloning", "probe": { "target": "https://api.gradium.ai/api/voices/", "method": "get", "lastAt": "2026-11-07T18:20:28.512752136Z", "lastOk": true, "lastStatus": 401, "lastMs": 113, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 55, "p95ms24h": 126, "samples24h": 200, "samples30d": 200, "days": [ { "date": "2026-11-06", "probes": 13, "ok": 13 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://gradium.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:21:13.560571015Z" }, "versions": [ { "registry": "github", "name": "gradium-ai/gradium-py", "version": "v0.6.4", "released": "2026-09-04", "seenAt": "2026-11-06T23:30:39.43925835Z" }, { "registry": "pypi", "name": "gradium", "version": "0.6.4", "released": "2026-09-04", "seenAt": "2026-11-06T23:30:39.128677495Z" } ], "githubStars": 35, "pypiWeekly": 13256, "securityTxt": { "url": "https://gradium.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:00:01.56480652Z" }, "llmsTxt": { "url": "https://docs.gradium.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:37.965397396Z" }, "pages": [ { "url": "https://docs.gradium.ai/guides/release-notes", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:06:30.120747573Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fff0688ce594" }, { "url": "https://gradium.ai/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:10:35.686080792Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "d55df4da4d94" }, { "url": "https://gradium.ai/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:10:37.771258344Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "2ff8dc4c7031" } ], "updatedAt": "2026-11-07T18:21:13.560571015Z" } }, "answer": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against Murf Voice Cloning API's 55.9 (C), and leads in 4 of 7 scored categories. Murf Voice Cloning API leads on reliability.", "b": { "slug": "murf-voice-cloning", "name": "Murf Voice Cloning API", "vendor": "Murf", "vendorUrl": "https://murf.ai", "kind": "model", "category": "voice-cloning", "summary": "Murf's service for creating voices from audio samples, with instant cloning and a managed professional option.", "url": "https://www.anchorterminal.com/tools/murf-voice-cloning", "markdownUrl": "https://www.anchorterminal.com/tools/murf-voice-cloning.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/murf-voice-cloning.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/murf-voice-cloning.json", "dns": "murf-voice-cloning.grade.anchorterminal.com", "repo": "https://github.com/murf-ai/murf-python-sdk", "license": "MIT (SDK)", "transports": [ "http" ], "remoteUrl": "https://api.murf.ai/v1", "packages": [ { "registry": "pypi", "name": "murf" } ], "auth": "api-key", "authNotes": "`api-key` header on every cloning call. Cloning must first be switched on for the workspace by Murf, otherwise the endpoints return `403`.", "pricing": "paid", "pricingNotes": "Enterprise plan only, priced by contract. Creating and keeping an instant clone costs nothing extra, and speech from it is billed at Falcon 2 rates (1 cent per 1,000 characters on the public price list, or the contract rate). Professional clones are quoted by sales (https://murf.ai/pricing?product=api).", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 108, "npmWeekly": null, "pypiWeekly": 669, "asOf": "2026-09-30" }, "docsUrl": "https://murf.ai/api/docs/voices-styles/instant-voice-cloning", "llmsTxt": "https://murf.ai/api/docs/llms.txt", "openapi": "https://murf.ai/api/docs/openapi.json", "capabilities": [ "voice.clone", "speech.tts" ], "tags": [ "hosted", "closed-source", "enterprise", "async-jobs", "python", "openapi", "llms-txt" ], "lastRelease": "2026-06-16", "graded": true, "anchor": { "graded": true, "score": 55.9, "grade": "C", "agentReady": false, "rank": 846, "ranked": true, "rankOf": 1486, "categoryRank": 9, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 63, "maintenance": 40, "payments": 0, "reliability": 83, "schema": 84, "security": 35, "transparency": 66 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-05" }, "negative": 0, "verdict": "One sample of up to 30 seconds, ready in a few minutes. Enterprise only, with no self-serve or trial access.", "bestFor": "Enterprises already on Murf Falcon 2 that want a cloned voice in the same contract.", "strengths": [ "One sample of up to 30 seconds, ready in a few minutes", "No charge to create or keep a clone, speech billed at Falcon 2 rates", "Clones speak every Falcon 2 locale whatever the sample's language", "Reference audio isn't used for training", "`GET /v1/speech/voices/cloned` lists only your clones" ], "weaknesses": [ "Enterprise only, with no self-serve or trial access", "No consent verification, only a written rule", "No SDK method for creating, listing or deleting clones", "Clones can't be retrained, renamed or used with Gen2", "Python is the only official SDK" ], "agentNotes": [ "Expect 403 until Murf enables cloning for the workspace", "Send a WAV, MP3 or FLAC at 24 kHz or above. A low sample rate is accepted and fails later", "Poll `GET /v1/speech/voice-clone-creation-status/{requestId}`, there are no webhooks", "Call the cloning endpoints over HTTP. The Python SDK has no cloning methods", "Use clones only with Falcon 2 streaming. Gen2 or the non-streaming endpoint returns 400" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 55.9 } ], "editorialScores": { "ergonomics": 63, "maintenance": 40, "payments": 0, "reliability": 83, "schema": 84, "security": 35, "transparency": 50 }, "provenanceScore": 81, "checked": { "categories": { "ergonomics": "2026-11-05", "maintenance": "2026-11-05", "payments": "2026-11-05", "reliability": "2026-11-05", "schema": "2026-11-05", "security": "2026-11-05", "transparency": "2026-11-05" }, "last": "2026-11-05", "lastMoved": "2026-11-05", "oldest": "2026-11-05", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl -X POST https://api.murf.ai/v1/speech/voices/create -H \"api-key: $MURF_API_KEY\" \\\n -F tag=support-voice -F \"displayName=Support voice\" -F audio=@sample.wav" }, "letme": { "capability": "https://letme.dev/voice.clone", "tool": "https://letme.dev/murf-voice-cloning" }, "sameCompany": [ "murf-tts" ], "area": "voice", "unitPrices": [ { "item": "Speech from an instant clone", "unit": "1m-chars", "usd": 10, "note": "Falcon 2 list rate, Enterprise contract rates may differ. No charge per clone" } ], "provenance": { "legalEntity": "Murf Inc.", "domain": "murf.ai", "domainRegistered": "2020-07-17", "endpointOnVendorDomain": true, "terms": "https://murf.ai/resources/terms_of_service/", "privacy": "https://murf.ai/resources/privacy_policy/", "statusPage": "https://murf.statuspage.io", "changelog": "https://murf.ai/api/docs/changelog", "securityTxt": "none", "checked": "2026-11-05", "notes": [ "Impressum at https://murf.ai/legal/impressum names Murf Inc., 535 Mission Street, San Francisco", "The terms URL redirects to https://murf.ai/legal/terms-of-service, dated December 19, 2024. Clauses 11.2.2 and 11.2.10 bar robots and scrapers and the use of bots or other automated methods to access the Services or the Site, so nothing else on murf.ai was requested on 5 November 2026.", "murf.statuspage.io is an Atlassian status page titled Murf Status, with API and Studio components, linked to murf.ai. Its robots.txt disallows only /api/ and /embed/. Read on 5 November 2026.", "security.txt per the 1 October check, not re-read on 5 November." ], "score": 81 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/murf-voice-cloning.json", "live": { "slug": "murf-voice-cloning", "probe": { "target": "https://api.murf.ai/v1", "method": "get", "lastAt": "2026-11-07T18:20:40.676566567Z", "lastOk": true, "lastStatus": 404, "lastMs": 335, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 305, "p95ms24h": 370, "samples24h": 239, "samples30d": 7910, "days": [ { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 251, "ok": 251 }, { "date": "2026-10-29", "probes": 248, "ok": 248 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://murf.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:21:31.745650745Z" }, "versions": [ { "registry": "github", "name": "murf-ai/murf-python-sdk", "version": "2.3.0", "released": "2026-03-05", "seenAt": "2026-11-06T23:47:49.130411471Z" }, { "registry": "pypi", "name": "murf", "version": "2.3.0", "released": "2026-03-05", "seenAt": "2026-11-06T23:47:48.986565126Z" } ], "githubStars": 109, "pypiWeekly": 822, "securityTxt": { "url": "https://murf.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T15:59:43.960693707Z" }, "llmsTxt": { "url": "https://murf.ai/api/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:33:16.915135885Z" }, "domain": { "domain": "murf.ai", "registered": "2020-07-17", "source": "https://rdap.identitydigital.services/rdap/domain/murf.ai", "checkedAt": "2026-11-01T14:19:12.529239665Z" }, "github": { "repo": "murf-ai/murf-python-sdk", "checkedAt": "2026-11-02T09:09:15.411538795Z", "stars": 109, "archived": false, "issuesEnabled": true, "pushedAt": "2026-03-05T12:41:06Z", "openIssues": 0, "openPRs": 0, "issuesOpened90d": 0, "issuesClosed90d": 0, "prsMerged90d": 0, "ci": { "branch": "main", "runs": 8, "success": 8, "failure": 0, "other": 0, "latest": "success", "latestAt": "2026-03-05T12:41:49Z" } }, "updatedAt": "2026-11-07T18:21:31.745650745Z" } }, "edges": [ { "by": 30, "category": "payments", "leads": "gradium-voice-cloning", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0). Plan prices and credits are public, 1 credit a character for speech, with no dollar price per unit, as cartesia-voice-cloning is read. Creating a clone uses no credits in the docs (10). The free plan has 45,000 credits a month, 5 custom voices and Voice Design, and the site says no credit card is required. Commercial use starts on the $12 plan (20). Signup is a browser flow in Gradium Studio (0). 0+10+20+0 = 30.", "b": "Per the 1 October check, not re-read on 5 November, since Murf's terms bar bots and automated access to its site. No x402, MPP or L402 (0). Cloning is Enterprise-only and priced by contract, which counts as contact sales even though Falcon 2 speech has a public list rate (0). No free cloning (0). A person has to talk to sales before the endpoints work (0)." }, "scores": { "a": 30, "b": 0 } }, { "by": 30, "category": "maintenance", "leads": "gradium-voice-cloning", "name": "Maintenance \u0026 community", "reasons": { "a": "Read as a model, on the lines the other hosted cloning listings use (recency 30, dated releases 10, deprecation notice 10, support 15, SDKs 15, health 10). Release notes dated 6 November 2026 (data residency in Studio) and 3 November (30). Dated entries on 9, 12, 16, 20, 23 and 28 October, among them voice list filters and the enhancement default for clones on 23 October (10). `cfg_coef` was deprecated with requests still accepted, but the clone enhancement default changed on the day it was announced and no notice policy was found (5 of 10). Public release notes, support@gradium.ai and a Discord server, with no evidence read of how they answer (10 of 15). `gradium` on PyPI at 0.6.4 (4 September 2026), with no SDK in a second language (10 of 15). The SDK repository was not cloned (5 of 10). 30+10+5+10+10+5 = 70.", "b": "Read as a model, on the lines Murf's text-to-speech listing and the other hosted speech models use (recency 30, dated releases 10, deprecation notice 10, support 15, issues 10, SDKs 15, health 10). The 1 October check used the tool lines. Murf's site wasn't re-read on 5 November, since its terms bar bots and automated access. The newest dated change this listing has read is the 20 July 2026 changelog entry, the Gen2 streaming deprecation notice, per the 1 October check, 108 days ago (10). No release touching cloning in the 90 days from 7 August that we could read. `murf-mcp` 0.1.14 (20 August) adds setup for a docs server and has no cloning tool (0). The Gen2 streaming notice gave 27 days, with no stated notice period (5 of 10). Public changelog and a Discord channel named in the docs (10 of 15). SDK issues weren't read, since GitHub's pages answer 403 in this session (3 of 10). The Python SDK is still 2.3.0 of 5 March 2026 by its tags. It streams speech from a clone but has no cloning methods (5 of 15). CI runs mypy and pytest on every push, Python 3.8 and later (7 of 10). 10+0+5+10+3+5+7 = 40." }, "scores": { "a": 70, "b": 40 } }, { "by": 20, "category": "reliability", "leads": "murf-voice-cloning", "name": "Reliability", "reasons": { "a": "Graded on the hosted voice API with the hosted lines. Atlassian Statuspage at gradium.statuspage.io with five components, one of them Voice Cloning (20). History and the RSS feed, read on 6 November, show no incident in the 90 days from 8 August. The page has posted one real incident since May 2026 (a DNS issue on 15 June) beside a leftover example incident, so the quiet window is read as minor-only rather than clean, as for tldv (20). Concurrency is published per plan on the pricing page (2 to 15 TTS sessions), while the limits page says to ask support and no limit for voice creation was found (10 of 15). No 429, Retry-After or backoff guidance was found; the errors page says to open a new connection after an error, and voice creation takes a `timeout_s` (3 of 15). No SLA in the Terms or on the pricing page (0). Instant cloning carries no beta label (10). 20+20+10+3+0+10 = 63.", "b": "Atlassian status page at murf.statuspage.io, titled Murf Status, with API and Studio components and incident history back to February 2024, read on 5 November 2026 (20). The 1 October check missed it. Its four posted incidents end on 22 September 2025, so the 90 days from 7 August are clean (30). Concurrency published, 5 Falcon 2 requests on US-East and 2 on other endpoints for Free and Pay as You Go, custom on Enterprise, per the 1 October check, not re-read on 5 November (15). The cloning docs don't mention 429 or backoff. The official Python SDK's README documents automatic retries with exponential backoff on 408, 429 and 5xx, which cover the speech calls a clone is used with but not the cloning endpoints (8). No idempotency key for clone creation (0). No SLA published (0). Instant cloning is generally available to Enterprise workspaces, per the 1 October check (10). 20+30+15+8+0+10 = 83." }, "scores": { "a": 63, "b": 83 } }, { "by": 13, "category": "security", "leads": "gradium-voice-cloning", "name": "Security \u0026 auth", "reasons": { "a": "Graded for voice cloning as the other listings in this category, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line. API keys per organisation in a header, revocable and able to expire, with no scopes found (20 of 30). No consent or verification field and no watermark. The Terms make the client obtain the consent of anyone whose voice is a sample and bar impersonation without explicit authorisation, and the API FAQ says explicit consent is required (6 of 20). The Terms grant Gradium a licence to use Client Data to improve its services and train its models, with no opt-out found, and zero data retention (paid plans) excludes voice samples, so samples are kept and may be used for training (2 of 15). Organisation roles and a member list, with no per-call audit log found (5 of 15). SOC 2 Type II and ISO 27001:2022 audited by A-LIGN, a trust centre and security@gradium.ai. No security.txt (404) and no bug bounty found (15 of 20). 20+6+2+5+15 = 48.", "b": "Per the 1 October check, not re-read on 5 November, since Murf's terms bar bots and automated access to its site. Graded for voice cloning, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line, since the API returns audio and IDs rather than third-party text. `api-key` header plus a token endpoint for short-lived client tokens, no scopes found (25 of 30). No consent step, only a written rule to clone voices you own or have documented consent for, and no watermark found (0 of 20). Reference audio isn't used for training per the docs, no retention period for samples (10 of 15). No per-call log or usage API found (0 of 15). No security.txt, bug bounty, SOC 2 or trust centre found (0 of 20)." }, "scores": { "a": 48, "b": 35 } } ], "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "Gradium SAS", "b": "Murf", "name": "Vendor" }, { "a": "https://api.gradium.ai/api/voices/", "b": "https://api.murf.ai/v1", "name": "Hosted endpoint" }, { "a": "HTTP, websocket", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "not published", "b": "$10 per 1M characters", "name": "Price for voice cloning" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Gradium's Terms of Service (version of 19 October 2026). The `gradium` Python SDK is on PyPI", "b": "MIT (SDK)", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-11-06", "b": "2026-06-16", "name": "Last release" }, { "a": "no date given", "b": "no date given", "name": "Terms last updated" }, { "a": "no date given", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "yes", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "108 stars, 669 PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "2/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against Murf Voice Cloning API's 55.9 (C), and leads in 4 of 7 scored categories. Murf Voice Cloning API leads on reliability.", "question": "Which is better for AI agents, Gradium Voice Cloning and Voice Design or Murf Voice Cloning API?" }, { "answer": "Both need an API key.", "question": "Do Gradium Voice Cloning and Voice Design and Murf Voice Cloning API need an API key?" }, { "answer": "Yes. Gradium Voice Cloning and Voice Design has a hosted endpoint at https://api.gradium.ai/api/voices/ and Murf Voice Cloning API at https://api.murf.ai/v1.", "question": "Can an agent call Gradium Voice Cloning and Voice Design and Murf Voice Cloning API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Security \u0026 auth, 48 against 35", "Payments \u0026 pricing, 30 against 0", "Maintenance \u0026 community, 70 against 40" ], "also": [ "Free to start without a card" ], "goodFor": "Builders on Gradium's TTS who want instant clones and designed voices in five European languages with EU residency.", "slug": "gradium-voice-cloning", "watchFor": "The Terms grant Gradium a licence to train its models on Client Data, and zero data retention excludes voice samples" }, { "aheadOn": [ "Reliability, 83 against 63" ], "also": null, "goodFor": "Enterprises already on Murf Falcon 2 that want a cloned voice in the same contract.", "slug": "murf-voice-cloning", "watchFor": "Enterprise only, with no self-serve or trial access" } ], "history": { "gradium-voice-cloning": null, "murf-voice-cloning": [ { "causes": [ "evidence", "correction" ], "date": "2026-11-05", "delta": 9.6, "from": 46.3, "fromGrade": "D", "to": 55.9, "toGrade": "C" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.2, "from": 46.1, "fromGrade": "D", "to": 46.3, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.4, "from": 46.5, "fromGrade": "D", "to": 46.1, "toGrade": "D" } ] }, "job": { "capability": "voice.clone", "name": "Voice cloning" }, "others": [ { "json": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-gradium-voice-cloning.json", "title": "Cartesia Voice Cloning API + MCP vs Gradium Voice Cloning and Voice Design", "url": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-gradium-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-murf-voice-cloning.json", "title": "Cartesia Voice Cloning API + MCP vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-gradium-voice-cloning.json", "title": "ElevenLabs Voice Cloning and Voice Design API vs Gradium Voice Cloning and Voice Design", "url": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-gradium-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-murf-voice-cloning.json", "title": "ElevenLabs Voice Cloning and Voice Design API vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-gradium-voice-cloning.json", "title": "Fish Audio Voice Cloning API vs Gradium Voice Cloning and Voice Design", "url": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-gradium-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-murf-voice-cloning.json", "title": "Fish Audio Voice Cloning API vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-hume-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Hume Octave Voice Design and Cloning + MCP", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-hume-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-inworld-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Inworld Instant Voice Cloning", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-inworld-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-minimax-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs MiniMax Voice Clone and Voice Design", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-minimax-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-playht-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs PlayHT Voice Cloning API", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-playht-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-resemble-ai-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Resemble AI Voice Cloning API", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-resemble-ai-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-smallest-voice-clone.json", "title": "Gradium Voice Cloning and Voice Design vs Smallest.ai Instant Voice Clone", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-smallest-voice-clone" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-soniox-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Soniox Voice Cloning", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-soniox-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-speechify-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Speechify API Voice Cloning", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-speechify-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-ultravox-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-ultravox-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.json", "title": "Gradium Voice Cloning and Voice Design vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/hume-voice-cloning-vs-murf-voice-cloning.json", "title": "Hume Octave Voice Design and Cloning + MCP vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/hume-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-murf-voice-cloning.json", "title": "Inworld Instant Voice Cloning vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-murf-voice-cloning.json", "title": "MiniMax Voice Clone and Voice Design vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-murf-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-playht-voice-cloning.json", "title": "Murf Voice Cloning API vs PlayHT Voice Cloning API", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-playht-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-resemble-ai-voice-cloning.json", "title": "Murf Voice Cloning API vs Resemble AI Voice Cloning API", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-resemble-ai-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-smallest-voice-clone.json", "title": "Murf Voice Cloning API vs Smallest.ai Instant Voice Clone", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-smallest-voice-clone" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-soniox-voice-cloning.json", "title": "Murf Voice Cloning API vs Soniox Voice Cloning", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-soniox-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-speechify-voice-cloning.json", "title": "Murf Voice Cloning API vs Speechify API Voice Cloning", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-speechify-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-ultravox-voice-cloning.json", "title": "Murf Voice Cloning API vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-ultravox-voice-cloning" }, { "json": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-voicestudio.json", "title": "Murf Voice Cloning API vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/murf-voice-cloning-vs-voicestudio" } ], "panel": null, "scores": [ { "by": 20, "edge": "murf-voice-cloning", "gradium-voice-cloning": 63, "key": "reliability", "murf-voice-cloning": 83, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 1, "edge": "murf-voice-cloning", "gradium-voice-cloning": 83, "key": "schema", "murf-voice-cloning": 84, "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 4, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 67, "key": "ergonomics", "murf-voice-cloning": 63, "name": "Agent ergonomics", "weight": 13 }, { "by": 13, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 48, "key": "security", "murf-voice-cloning": 35, "name": "Security \u0026 auth", "weight": 14 }, { "by": 30, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 30, "key": "payments", "murf-voice-cloning": 0, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 30, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 70, "key": "maintenance", "murf-voice-cloning": 40, "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 3, "edge": "murf-voice-cloning", "gradium-voice-cloning": 63, "key": "transparency", "murf-voice-cloning": 66, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against Murf Voice Cloning API's 55.9 (C), and leads in 4 of 7 scored categories. Murf Voice Cloning API leads on reliability. Both do voice cloning.", "tasks": null, "tutorials": [ { "title": "Create an instant voice clone with Murf", "tool": "murf-voice-cloning", "url": "https://www.anchorterminal.com/tutorials/murf-voice-cloning/" } ], "verdicts": { "gradium-voice-cloning": "A public OpenAPI file, dated release notes and a free plan with five custom voices and no card make Gradium's clone and design endpoints easy to adopt. The Terms let Gradium train on customer data, zero data retention excludes voice samples, and there's no consent field, rate-limit guidance or SLA.", "murf-voice-cloning": "One sample of up to 30 seconds, ready in a few minutes. Enterprise only, with no self-serve or trial access." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning", "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning.min.md" }, "markdown": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against Murf Voice Cloning API's 55.9 (C), and leads in 4 of 7 scored categories. Murf Voice Cloning API leads on reliability. Both do voice cloning.\n\n- Gradium Voice Cloning and Voice Design: grade C, 60.8/100, rank #637 of 1486. Markdown https://www.anchorterminal.com/tools/gradium-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/gradium-voice-cloning.json\n- Murf Voice Cloning API: grade C, 55.9/100, rank #846 of 1486. Markdown https://www.anchorterminal.com/tools/murf-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/murf-voice-cloning.json\n- Best voice cloning and custom voice APIs for AI agents: https://www.anchorterminal.com/best/voice-cloning/index.md\n- All 133 cloning comparisons: https://www.anchorterminal.com/compare/voice-cloning/index.md\n\n## Which one, for what\n\n### Gradium Voice Cloning and Voice Design (C)\n\nGood for: Builders on Gradium's TTS who want instant clones and designed voices in five European languages with EU residency.\n\nAhead on:\n- Security \u0026 auth, 48 against 35\n- Payments \u0026 pricing, 30 against 0\n- Maintenance \u0026 community, 70 against 40\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: The Terms grant Gradium a licence to train its models on Client Data, and zero data retention excludes voice samples\n\n### Murf Voice Cloning API (C)\n\nGood for: Enterprises already on Murf Falcon 2 that want a cloned voice in the same contract.\n\nAhead on:\n- Reliability, 83 against 63\n\nWatch for: Enterprise only, with no self-serve or trial access\n\n\n## Why the edge\n\n### Payments \u0026 pricing: Gradium Voice Cloning and Voice Design +30\n\n- Gradium Voice Cloning and Voice Design (30): No x402, MPP or L402 (0). Plan prices and credits are public, 1 credit a character for speech, with no dollar price per unit, as cartesia-voice-cloning is read. Creating a clone uses no credits in the docs (10). The free plan has 45,000 credits a month, 5 custom voices and Voice Design, and the site says no credit card is required. Commercial use starts on the $12 plan (20). Signup is a browser flow in Gradium Studio (0). 0+10+20+0 = 30.\n- Murf Voice Cloning API (0): Per the 1 October check, not re-read on 5 November, since Murf's terms bar bots and automated access to its site. No x402, MPP or L402 (0). Cloning is Enterprise-only and priced by contract, which counts as contact sales even though Falcon 2 speech has a public list rate (0). No free cloning (0). A person has to talk to sales before the endpoints work (0).\n\n### Maintenance \u0026 community: Gradium Voice Cloning and Voice Design +30\n\n- Gradium Voice Cloning and Voice Design (70): Read as a model, on the lines the other hosted cloning listings use (recency 30, dated releases 10, deprecation notice 10, support 15, SDKs 15, health 10). Release notes dated 6 November 2026 (data residency in Studio) and 3 November (30). Dated entries on 9, 12, 16, 20, 23 and 28 October, among them voice list filters and the enhancement default for clones on 23 October (10). `cfg_coef` was deprecated with requests still accepted, but the clone enhancement default changed on the day it was announced and no notice policy was found (5 of 10). Public release notes, support@gradium.ai and a Discord server, with no evidence read of how they answer (10 of 15). `gradium` on PyPI at 0.6.4 (4 September 2026), with no SDK in a second language (10 of 15). The SDK repository was not cloned (5 of 10). 30+10+5+10+10+5 = 70.\n- Murf Voice Cloning API (40): Read as a model, on the lines Murf's text-to-speech listing and the other hosted speech models use (recency 30, dated releases 10, deprecation notice 10, support 15, issues 10, SDKs 15, health 10). The 1 October check used the tool lines. Murf's site wasn't re-read on 5 November, since its terms bar bots and automated access. The newest dated change this listing has read is the 20 July 2026 changelog entry, the Gen2 streaming deprecation notice, per the 1 October check, 108 days ago (10). No release touching cloning in the 90 days from 7 August that we could read. `murf-mcp` 0.1.14 (20 August) adds setup for a docs server and has no cloning tool (0). The Gen2 streaming notice gave 27 days, with no stated notice period (5 of 10). Public changelog and a Discord channel named in the docs (10 of 15). SDK issues weren't read, since GitHub's pages answer 403 in this session (3 of 10). The Python SDK is still 2.3.0 of 5 March 2026 by its tags. It streams speech from a clone but has no cloning methods (5 of 15). CI runs mypy and pytest on every push, Python 3.8 and later (7 of 10). 10+0+5+10+3+5+7 = 40.\n\n### Reliability: Murf Voice Cloning API +20\n\n- Gradium Voice Cloning and Voice Design (63): Graded on the hosted voice API with the hosted lines. Atlassian Statuspage at gradium.statuspage.io with five components, one of them Voice Cloning (20). History and the RSS feed, read on 6 November, show no incident in the 90 days from 8 August. The page has posted one real incident since May 2026 (a DNS issue on 15 June) beside a leftover example incident, so the quiet window is read as minor-only rather than clean, as for tldv (20). Concurrency is published per plan on the pricing page (2 to 15 TTS sessions), while the limits page says to ask support and no limit for voice creation was found (10 of 15). No 429, Retry-After or backoff guidance was found; the errors page says to open a new connection after an error, and voice creation takes a `timeout_s` (3 of 15). No SLA in the Terms or on the pricing page (0). Instant cloning carries no beta label (10). 20+20+10+3+0+10 = 63.\n- Murf Voice Cloning API (83): Atlassian status page at murf.statuspage.io, titled Murf Status, with API and Studio components and incident history back to February 2024, read on 5 November 2026 (20). The 1 October check missed it. Its four posted incidents end on 22 September 2025, so the 90 days from 7 August are clean (30). Concurrency published, 5 Falcon 2 requests on US-East and 2 on other endpoints for Free and Pay as You Go, custom on Enterprise, per the 1 October check, not re-read on 5 November (15). The cloning docs don't mention 429 or backoff. The official Python SDK's README documents automatic retries with exponential backoff on 408, 429 and 5xx, which cover the speech calls a clone is used with but not the cloning endpoints (8). No idempotency key for clone creation (0). No SLA published (0). Instant cloning is generally available to Enterprise workspaces, per the 1 October check (10). 20+30+15+8+0+10 = 83.\n\n### Security \u0026 auth: Gradium Voice Cloning and Voice Design +13\n\n- Gradium Voice Cloning and Voice Design (48): Graded for voice cloning as the other listings in this category, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line. API keys per organisation in a header, revocable and able to expire, with no scopes found (20 of 30). No consent or verification field and no watermark. The Terms make the client obtain the consent of anyone whose voice is a sample and bar impersonation without explicit authorisation, and the API FAQ says explicit consent is required (6 of 20). The Terms grant Gradium a licence to use Client Data to improve its services and train its models, with no opt-out found, and zero data retention (paid plans) excludes voice samples, so samples are kept and may be used for training (2 of 15). Organisation roles and a member list, with no per-call audit log found (5 of 15). SOC 2 Type II and ISO 27001:2022 audited by A-LIGN, a trust centre and security@gradium.ai. No security.txt (404) and no bug bounty found (15 of 20). 20+6+2+5+15 = 48.\n- Murf Voice Cloning API (35): Per the 1 October check, not re-read on 5 November, since Murf's terms bar bots and automated access to its site. Graded for voice cloning, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line, since the API returns audio and IDs rather than third-party text. `api-key` header plus a token endpoint for short-lived client tokens, no scopes found (25 of 30). No consent step, only a written rule to clone voices you own or have documented consent for, and no watermark found (0 of 20). Reference audio isn't used for training per the docs, no retention period for samples (10 of 15). No per-call log or usage API found (0 of 15). No security.txt, bug bounty, SOC 2 or trust centre found (0 of 20).\n\n## Score by category\n\n| Category | Weight | Gradium Voice Cloning and Voice Design | Murf Voice Cloning API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 63 | 83 | Murf Voice Cloning API +20 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 84 | Murf Voice Cloning API +1 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 63 | Gradium Voice Cloning and Voice Design +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 35 | Gradium Voice Cloning and Voice Design +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 0 | Gradium Voice Cloning and Voice Design +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 70 | 40 | Gradium Voice Cloning and Voice Design +30 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 66 | Murf Voice Cloning API +3 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.8 · C** | **55.9 · C** | |\n\n## Facts side by side\n\n| Fact | Gradium Voice Cloning and Voice Design | Murf Voice Cloning API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Gradium SAS | Murf |\n| Hosted endpoint | `https://api.gradium.ai/api/voices/` | `https://api.murf.ai/v1` |\n| Transports | HTTP, websocket | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Paid |\n| Price for voice cloning | not published | $10 per 1M characters |\n| x402 | no | no |\n| Licence | Proprietary service under Gradium's Terms of Service (version of 19 October 2026). The `gradium` Python SDK is on PyPI | MIT (SDK) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-11-06 | 2026-06-16 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | no date given | no date given |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | none | 108 stars, 669 PyPI/wk |\n| Agent reviews | none | 2/5 (2) |\n\n## How the scores have moved\n\n### Gradium Voice Cloning and Voice Design\n\nNo score change since it was listed.\n\n### Murf Voice Cloning API\n\n- +9.6 on 5 November 2026 (D to C): new evidence, correction\n- +0.2 on 27 October 2026: checklist\n- -0.4 on 8 October 2026: checklist\n\n## Verdicts\n\n**Gradium Voice Cloning and Voice Design.** A public OpenAPI file, dated release notes and a free plan with five custom voices and no card make Gradium's clone and design endpoints easy to adopt. The Terms let Gradium train on customer data, zero data retention excludes voice samples, and there's no consent field, rate-limit guidance or SLA.\n\n**Murf Voice Cloning API.** One sample of up to 30 seconds, ready in a few minutes. Enterprise only, with no self-serve or trial access.\n\n## Before you call either\n\n### Gradium Voice Cloning and Voice Design\n\n1. Send `language` on every clone. It's required and must be one of en, fr, de, es or pt and match the recording\n2. Clones are enhanced by default since 23 October 2026. Pass `enhance=false` to keep the raw voice, then check `enhance` on GET\n3. Pass a clone as `voice_id` in TTS, not `voice`\n4. On a non-2xx synthesis reply, parse the `error from server \u003ccode\u003e` prefix; 1008 means a bad or revoked key\n5. Check the custom-voice allowance first. The free plan holds 5 voices shared by clones and designs\n\n### Murf Voice Cloning API\n\n1. Expect 403 until Murf enables cloning for the workspace\n2. Send a WAV, MP3 or FLAC at 24 kHz or above. A low sample rate is accepted and fails later\n3. Poll `GET /v1/speech/voice-clone-creation-status/{requestId}`, there are no webhooks\n4. Call the cloning endpoints over HTTP. The Python SDK has no cloning methods\n5. Use clones only with Falcon 2 streaming. Gen2 or the non-streaming endpoint returns 400\n\n## Tutorials\n\n- [Create an instant voice clone with Murf](https://www.anchorterminal.com/tutorials/murf-voice-cloning/), for Murf Voice Cloning API\n\n## Questions\n\n### Which is better for AI agents, Gradium Voice Cloning and Voice Design or Murf Voice Cloning API?\n\nGradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against Murf Voice Cloning API's 55.9 (C), and leads in 4 of 7 scored categories. Murf Voice Cloning API leads on reliability.\n\n### Do Gradium Voice Cloning and Voice Design and Murf Voice Cloning API need an API key?\n\nBoth need an API key.\n\n### Can an agent call Gradium Voice Cloning and Voice Design and Murf Voice Cloning API without installing anything?\n\nYes. Gradium Voice Cloning and Voice Design has a hosted endpoint at https://api.gradium.ai/api/voices/ and Murf Voice Cloning API at https://api.murf.ai/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gradium-voice-cloning\", \"b\": \"murf-voice-cloning\"}`. From a terminal: `anchor compare gradium-voice-cloning murf-voice-cloning`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gradium-voice-cloning.json and https://www.anchorterminal.com/api/v1/tools/murf-voice-cloning.json\n\n## Other comparisons with Gradium Voice Cloning and Voice Design or Murf Voice Cloning API\n\n- [Cartesia Voice Cloning API + MCP vs Gradium Voice Cloning and Voice Design](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-gradium-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-murf-voice-cloning.md)\n- [ElevenLabs Voice Cloning and Voice Design API vs Gradium Voice Cloning and Voice Design](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-gradium-voice-cloning.md)\n- [ElevenLabs Voice Cloning and Voice Design API vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-murf-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Gradium Voice Cloning and Voice Design](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-gradium-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-murf-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Hume Octave Voice Design and Cloning + MCP](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-hume-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Inworld Instant Voice Cloning](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-inworld-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs MiniMax Voice Clone and Voice Design](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-minimax-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs PlayHT Voice Cloning API](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-playht-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-resemble-ai-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-smallest-voice-clone.md)\n- [Gradium Voice Cloning and Voice Design vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-soniox-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-speechify-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Gradium Voice Cloning and Voice Design vs VoiceStudio](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.md)\n- [Hume Octave Voice Design and Cloning + MCP vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-murf-voice-cloning.md)\n- [Inworld Instant Voice Cloning vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-murf-voice-cloning.md)\n- [MiniMax Voice Clone and Voice Design vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-murf-voice-cloning.md)\n- [Murf Voice Cloning API vs PlayHT Voice Cloning API](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-playht-voice-cloning.md)\n- [Murf Voice Cloning API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-resemble-ai-voice-cloning.md)\n- [Murf Voice Cloning API vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-smallest-voice-clone.md)\n- [Murf Voice Cloning API vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-soniox-voice-cloning.md)\n- [Murf Voice Cloning API vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-speechify-voice-cloning.md)\n- [Murf Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Murf Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-voicestudio.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": 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Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Gradium Voice Cloning and Voice Design C 60.8", "Murf Voice Cloning API C 55.9", "scores" ], "h1": "Gradium Voice Cloning and Voice Design vs Murf Voice Cloning API", "image": "https://www.anchorterminal.com/assets/og/default.png", "path": "/compare/gradium-voice-cloning-vs-murf-voice-cloning", "published": "2026-10-01", "section": "tools", "title": "Gradium Voice Cloning and Voice Design vs Murf Voice Cloning (2026)", "toc": null, "updated": "2026-11-07", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-voice-cloning" }, "tokens": { "markdown": 4750, "slim": 2430 }, "version": 1 }