{ "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 VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories.", "b": { "slug": "voicestudio", "name": "VoiceStudio", "vendor": "VoiceStudio maintainers", "vendorUrl": "https://voicestudio.sh", "kind": "mcp", "category": "voice-cloning", "summary": "VoiceStudio runs speech generation, voice cloning, transcription and dubbing on local hardware. Its desktop application exposes HTTP and MCP interfaces for agent-controlled audio workflows.", "url": "https://www.anchorterminal.com/tools/voicestudio", "markdownUrl": "https://www.anchorterminal.com/tools/voicestudio.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/voicestudio.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/voicestudio.json", "dns": "voicestudio.grade.anchorterminal.com", "repo": "https://github.com/debpalash/VoiceStudio", "license": "AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences.", "transports": [ "stdio", "streamable-http" ], "packages": [], "auth": "mixed", "authNotes": "Local MCP over HTTP or a stdio shim. LAN sharing uses a PIN. A local reverse proxy must enforce its own authentication because loopback requests can bypass the sharing PIN.", "pricing": "freemium", "pricingNotes": "The AGPL desktop app is free to run on your own hardware. Pro lists $99 per user a year at launch ($199 list) and Lifetime $199 one-time ($499 list), with purchases marked as coming soon on 5 November 2026. Cloud is an early-access enquiry, not a generally available hosted API.", "priceSummary": "Freemium", "where": "local", "x402": { "level": "no", "evidence": "No machine payment protocol established in the reviewed project documentation.", "endpoints": [] }, "toolCount": 9, "popularity": { "githubStars": 76032, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-19" }, "docsUrl": "https://github.com/debpalash/VoiceStudio#readme", "capabilities": [ "audio.generate", "voice.clone", "audio.transcribe" ], "tags": [ "voice-cloning", "mcp", "freemium" ], "lastRelease": "2026-10-26", "graded": true, "anchor": { "graded": true, "score": 50.4, "grade": "D", "agentReady": false, "rank": 1052, "ranked": true, "rankOf": 1486, "categoryRank": 13, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 70, "maintenance": 50, "payments": 30, "reliability": 45, "schema": 60, "security": 45, "transparency": 49 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-05" }, "negative": 0, "verdict": "VoiceStudio runs speech generation, voice cloning and transcription on local hardware and exposes nine MCP tools, with file output confined to a configured base path. Since 0.5.7, API and MCP calls fail until non-commercial model licences are accepted, and the tools carry no read-only or destructive annotations.", "bestFor": "An agent builder who wants local speech generation, cloning and transcription without a hosted API, and can run models on a GPU, or on a CPU at lower speed.", "strengths": [ "Nine compact MCP tools, with an output mode that returns file paths instead of base64 audio", "File inputs and outputs confined to `OMNIVOICE_MCP_BASE_PATH`, with symlinks resolved before the check", "SECURITY.md promises acknowledgement within 48 hours and names a private reporting route", "Four stable releases between 20 September and 26 October 2026, with a dated changelog", "AGPL-3.0 desktop app, free to download with no account" ], "weaknesses": [ "No readOnlyHint or destructiveHint annotations on any tool", "Plain-HTTP sharing sends the PIN unencrypted, and loopback requests through a local proxy bypass it", "Non-commercial models, the default OmniVoice model included, return a licence error until accepted in the app", "Version 0.5.7, with remote compute moved to the paid Pro build in that release", "The Pro build sends usage and error metadata with no switch to turn it off" ], "agentNotes": [ "Keep the server on loopback unless network authentication has been verified.", "Set `OMNIVOICE_MCP_OUTPUT_MODE=files` and a shared `OMNIVOICE_MCP_BASE_PATH` to keep audio out of context.", "Accept the model's licence in Model Catalogue before the first API or MCP call, or expect a licence error.", "Clone a voice only with its owner's consent, which the terms require and the software cannot check.", "Check the selected model licence before commercial voice use." ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 4, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 50.4 } ], "editorialScores": { "ergonomics": 70, "maintenance": 50, "payments": 30, "reliability": 45, "schema": 60, "security": 45, "transparency": 65 }, "provenanceScore": 33, "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 } }, "letme": { "capability": "https://letme.dev/audio.generate", "tool": "https://letme.dev/voicestudio" }, "area": "voice", "provenance": { "legalEntity": "", "domain": "voicestudio.sh", "domainRegistered": "", "endpointOnVendorDomain": false, "terms": "https://raw.githubusercontent.com/debpalash/VoiceStudio/main/LICENSE", "privacy": "https://voicestudio.sh/privacy", "statusPage": "", "changelog": "https://github.com/debpalash/VoiceStudio/releases", "securityTxt": "unknown", "checked": "2026-11-05", "notes": [ "Assessment covers the named repository. No ownership claim or domain registration was verified.", "The website terms (last updated 4 November 2026) say the repository maintainers own them and that Pro and Lifetime purchases are coming soon. They ask users not to scrape the site at a volume that degrades it and set no ban on automated reading.", ".github/SECURITY.md names security@voicestudio.sh and GitHub Security Advisories for reports. No security.txt was requested." ], "score": 33 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/voicestudio.json", "live": { "slug": "voicestudio", "versions": [ { "registry": "github", "name": "debpalash/VoiceStudio", "version": "v0.5.7", "released": "2026-10-26", "seenAt": "2026-11-07T00:16:12.200288869Z" } ], "githubStars": 102883, "securityTxt": { "url": "https://voicestudio.sh/.well-known/security.txt", "state": "valid", "expires": "2027-08-12T00:00:00.000Z", "checkedAt": "2026-11-07T16:01:41.230397168Z" }, "domain": { "domain": "voicestudio.sh", "checkedAt": "2026-11-01T14:25:58.9012663Z" }, "pages": [ { "url": "https://voicestudio.sh/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:23:30.488565553Z", "changedAt": "2026-11-07T14:23:30.488565553Z", "fingerprint": "3ab0fc57ece5" }, { "url": "https://raw.githubusercontent.com/debpalash/VoiceStudio/main/LICENSE", "kind": "terms", "status": 304, "checkedAt": "2026-11-07T14:20:35.708168466Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "a9905841fee0" } ], "github": { "repo": "debpalash/voicestudio", "checkedAt": "2026-11-02T08:24:55.967220051Z", "stars": 98321, "archived": false, "issuesEnabled": true, "pushedAt": "2026-11-02T07:48:12Z", "openIssues": 71, "openPRs": 48, "issuesOpened90d": 895, "issuesClosed90d": 853, "prsMerged90d": 993, "ci": { "branch": "main", "runs": 50, "success": 48, "failure": 1, "other": 1, "latest": "success", "latestAt": "2026-11-01T21:12:28Z" }, "replies": { "sampled": 18, "unanswered": 17, "medianDays": 2 } }, "updatedAt": "2026-11-07T16:01:41.230397168Z" } }, "edges": [ { "by": 23, "category": "schema", "leads": "gradium-voice-cloning", "name": "Schema \u0026 documentation", "reasons": { "a": "Public OpenAPI 3.1 file at docs.gradium.ai/api-reference/openapi.json (25). llms.txt and Markdown pages (10). The guides say when to clone, design, enhance or localise a voice, and the custom-voice page explains the enhancement default and how to opt out (14 of 20). The clone body has `audio_file`, `name` and `language` required, a five-value language enum and typed defaults for `start_s`, `enhance` and `timeout_s` (14 of 15). curl and Python examples. The create call documents only 201 and 422, and the errors page covers synthesis, with plain-text 500 bodies (9 of 15). Routes carry no version, the OpenAPI file is 0.1.0, and release notes are dated per entry, newest 6 November 2026 (11 of 15). The API reference FAQ gives a 300-second session where the limits page says 3,000. 25+10+14+14+9+11 = 83.", "b": "docs/mcp.md is a Markdown guide in the repository, and voicestudio.sh says its docs also ship as Markdown and llms.txt (10). The guide's tool table names nine tools with a line on what each does, and the tool docstrings say what each returns and when a path or base64 input applies (15). Parameters are typed in the tool signatures and documented in the guide (format one of wav, ogg or opus, output modes, base path rules), but no JSON Schema is published on a docs page, so the contract line scores 0 (10 for typed inputs). Client configuration examples for Claude Code, Cursor and Codex CLI and documented refusals and error objects (10). CHANGELOG.md with dated releases, a Tauri to Electron migration guide and a supported-versions table (15). 0+10+15+10+10+15 = 60." }, "scores": { "a": 83, "b": 60 } }, { "by": 20, "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": "Version 0.5.7 released on 26 October 2026, 10 days before this check (30). Four stable releases since 7 August, 0.5.4 (20 September), 0.5.5 (22 September), 0.5.6 (23 September) and 0.5.7 (26 October). The three 0.5.7 betas don't count (20). Issue and pull request replies couldn't be read, since GitHub's pages are closed to us (0, unchecked). No official MCP registry entry was found on a readable page (0). Package health not established. CI is public and 0.5.7 updated bundled dependencies past published advisories, but the CI results couldn't be read (0). 30+20+0+0+0 = 50." }, "scores": { "a": 70, "b": 50 } }, { "by": 18, "category": "reliability", "leads": "gradium-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": "Read with the local-package rubric, as a desktop app with a local MCP server over Streamable HTTP or a stdio shim. Installers for Windows, macOS, Linux, Android and iPhone on each GitHub release, with platforms and runtime setup documented (20). A public GitHub Actions workflow runs pytest on the backend and tests, the frontend tests and Electron tests on every pull request and push to main. Its results couldn't be read, since GitHub's pages are closed to us (15). Open crash and regression issues couldn't be read for the same reason (0, unchecked). Dated 0.x releases in CHANGELOG.md with Changed, Added, Removed and Fixed sections and upgrade notes, but no semver promise at 0.5 (10, the earlier partial, kept). Version 0.5.7, not 1.0 and not declared stable (0). 20+15+0+10+0 = 45." }, "scores": { "a": 63, "b": 45 } }, { "by": 14, "category": "transparency", "leads": "gradium-voice-cloning", "name": "Transparency \u0026 trust", "reasons": { "a": "Closed service with clear terms, version of 19 October 2026, naming Gradium SAS with its Paris registration (15 of 30). The Terms allow training on Client Data, zero data retention excludes voice samples, the privacy policy gives retention criteria without periods, and a DPA is published as an exhibit. The statements agree but give no retention period for samples (15 of 30). Deprecations appear in dated release notes, with no written notice policy (10 of 20). EU and US residency is documented and selectable from the XS plan. Sub-processors sit in the trust centre, not read (12 of 20). 15+15+10+12 = 52.", "b": "AGPL-3.0 source for the desktop app, with the Pro build under a separate commercial licence (30). Desktop retention settings and the website privacy notice (last updated 4 November 2026) are documented. The notice says the Pro desktop app sends usage and error metadata to Supermetry with no switch to turn it off, while the open-source app's analytics stay opt-in (15). A dated notice that Tauri 0.5.3 is the final Tauri release, with a migration guide, and no stated notice period (5). Open-source desktop analytics are opt-in and disclosed in docs/electron-privacy.md (15). 30+15+5+15 = 65." }, "scores": { "a": 63, "b": 49 } } ], "facts": [ { "a": "Model API", "b": "MCP server", "name": "Kind" }, { "a": "Gradium SAS", "b": "VoiceStudio maintainers", "name": "Vendor" }, { "a": "https://api.gradium.ai/api/voices/", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP, websocket", "b": "stdio, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "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": "AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences.", "name": "Licence" }, { "a": "none", "b": "9", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2026-11-06", "b": "2026-10-26", "name": "Last release" }, { "a": "no date given", "b": "no date given", "name": "Terms last updated" }, { "a": "no date given", "b": "2026-10-08", "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": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "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": "76k stars", "name": "Popularity" }, { "a": "none", "b": "3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories.", "question": "Which is better for AI agents, Gradium Voice Cloning and Voice Design or VoiceStudio?" }, { "answer": "Gradium Voice Cloning and Voice Design needs an API key. VoiceStudio takes an API key or an OAuth sign-in.", "question": "Do Gradium Voice Cloning and Voice Design and VoiceStudio need an API key?" }, { "answer": "Gradium Voice Cloning and Voice Design has a hosted endpoint at https://api.gradium.ai/api/voices/. VoiceStudio runs on your own machine, with no hosted endpoint listed.", "question": "Can an agent call Gradium Voice Cloning and Voice Design and VoiceStudio without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 63 against 45", "Schema \u0026 documentation, 83 against 60", "Maintenance \u0026 community, 70 against 50", "Transparency \u0026 trust, 63 against 49" ], "also": [ "A hosted endpoint, with nothing to install", "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": null, "also": [ "Runs on your own machine" ], "goodFor": "An agent builder who wants local speech generation, cloning and transcription without a hosted API, and can run models on a GPU, or on a CPU at lower speed.", "slug": "voicestudio", "watchFor": "No readOnlyHint or destructiveHint annotations on any tool" } ], "history": { "gradium-voice-cloning": null, "voicestudio": [ { "causes": [ "evidence", "correction" ], "date": "2026-11-05", "delta": 3.7, "from": 46.7, "fromGrade": "D", "to": 50.4, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.5, "from": 46.2, "fromGrade": "D", "to": 46.7, "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-voicestudio.json", "title": "Cartesia Voice Cloning API + MCP vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-voicestudio" }, { "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-voicestudio.json", "title": "ElevenLabs Voice Cloning and Voice Design API vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-voicestudio" }, { "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-voicestudio.json", "title": "Fish Audio Voice Cloning API vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-voicestudio" }, { "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-murf-voice-cloning.json", "title": "Gradium Voice Cloning and Voice Design vs Murf Voice Cloning API", "url": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-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/hume-voice-cloning-vs-voicestudio.json", "title": "Hume Octave Voice Design and Cloning + MCP vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/hume-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-voicestudio.json", "title": "Inworld Instant Voice Cloning vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-voicestudio.json", "title": "MiniMax Voice Clone and Voice Design vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-voicestudio" }, { "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" }, { "json": "https://www.anchorterminal.com/compare/playht-voice-cloning-vs-voicestudio.json", "title": "PlayHT Voice Cloning API vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/playht-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio.json", "title": "Resemble AI Voice Cloning API vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/smallest-voice-clone-vs-voicestudio.json", "title": "Smallest.ai Instant Voice Clone vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/smallest-voice-clone-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-voicestudio.json", "title": "Soniox Voice Cloning vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-voicestudio.json", "title": "Speechify API Voice Cloning vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-voicestudio" }, { "json": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio.json", "title": "Ultravox Voice Cloning vs VoiceStudio", "url": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio" } ], "panel": null, "scores": [ { "by": 18, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 63, "key": "reliability", "name": "Reliability", "voicestudio": 45, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 23, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 83, "key": "schema", "name": "Schema \u0026 documentation", "voicestudio": 60, "weight": 13 }, { "by": 3, "edge": "voicestudio", "gradium-voice-cloning": 67, "key": "ergonomics", "name": "Agent ergonomics", "voicestudio": 70, "weight": 13 }, { "by": 3, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 48, "key": "security", "name": "Security \u0026 auth", "voicestudio": 45, "weight": 14 }, { "by": 0, "edge": "", "gradium-voice-cloning": 30, "key": "payments", "name": "Payments \u0026 pricing", "voicestudio": 30, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 20, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 70, "key": "maintenance", "name": "Maintenance \u0026 community", "voicestudio": 50, "weight": 7 }, { "by": 14, "edge": "gradium-voice-cloning", "gradium-voice-cloning": 63, "key": "transparency", "name": "Transparency \u0026 trust", "voicestudio": 49, "weight": 7 } ], "summary": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories. Both do voice cloning.", "tasks": null, "tutorials": [], "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.", "voicestudio": "VoiceStudio runs speech generation, voice cloning and transcription on local hardware and exposes nine MCP tools, with file output confined to a configured base path. Since 0.5.7, API and MCP calls fail until non-commercial model licences are accepted, and the tools carry no read-only or destructive annotations." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio", "json": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.min.md" }, "markdown": "Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories. 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- VoiceStudio: grade D, 50.4/100, rank #1052 of 1486. Markdown https://www.anchorterminal.com/tools/voicestudio.md · JSON https://www.anchorterminal.com/api/v1/tools/voicestudio.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- Reliability, 63 against 45\n- Schema \u0026 documentation, 83 against 60\n- Maintenance \u0026 community, 70 against 50\n- Transparency \u0026 trust, 63 against 49\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\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### VoiceStudio (D)\n\nGood for: An agent builder who wants local speech generation, cloning and transcription without a hosted API, and can run models on a GPU, or on a CPU at lower speed.\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: No readOnlyHint or destructiveHint annotations on any tool\n\n\n## Why the edge\n\n### Schema \u0026 documentation: Gradium Voice Cloning and Voice Design +23\n\n- Gradium Voice Cloning and Voice Design (83): Public OpenAPI 3.1 file at docs.gradium.ai/api-reference/openapi.json (25). llms.txt and Markdown pages (10). The guides say when to clone, design, enhance or localise a voice, and the custom-voice page explains the enhancement default and how to opt out (14 of 20). The clone body has `audio_file`, `name` and `language` required, a five-value language enum and typed defaults for `start_s`, `enhance` and `timeout_s` (14 of 15). curl and Python examples. The create call documents only 201 and 422, and the errors page covers synthesis, with plain-text 500 bodies (9 of 15). Routes carry no version, the OpenAPI file is 0.1.0, and release notes are dated per entry, newest 6 November 2026 (11 of 15). The API reference FAQ gives a 300-second session where the limits page says 3,000. 25+10+14+14+9+11 = 83.\n- VoiceStudio (60): docs/mcp.md is a Markdown guide in the repository, and voicestudio.sh says its docs also ship as Markdown and llms.txt (10). The guide's tool table names nine tools with a line on what each does, and the tool docstrings say what each returns and when a path or base64 input applies (15). Parameters are typed in the tool signatures and documented in the guide (format one of wav, ogg or opus, output modes, base path rules), but no JSON Schema is published on a docs page, so the contract line scores 0 (10 for typed inputs). Client configuration examples for Claude Code, Cursor and Codex CLI and documented refusals and error objects (10). CHANGELOG.md with dated releases, a Tauri to Electron migration guide and a supported-versions table (15). 0+10+15+10+10+15 = 60.\n\n### Maintenance \u0026 community: Gradium Voice Cloning and Voice Design +20\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- VoiceStudio (50): Version 0.5.7 released on 26 October 2026, 10 days before this check (30). Four stable releases since 7 August, 0.5.4 (20 September), 0.5.5 (22 September), 0.5.6 (23 September) and 0.5.7 (26 October). The three 0.5.7 betas don't count (20). Issue and pull request replies couldn't be read, since GitHub's pages are closed to us (0, unchecked). No official MCP registry entry was found on a readable page (0). Package health not established. CI is public and 0.5.7 updated bundled dependencies past published advisories, but the CI results couldn't be read (0). 30+20+0+0+0 = 50.\n\n### Reliability: Gradium Voice Cloning and Voice Design +18\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- VoiceStudio (45): Read with the local-package rubric, as a desktop app with a local MCP server over Streamable HTTP or a stdio shim. Installers for Windows, macOS, Linux, Android and iPhone on each GitHub release, with platforms and runtime setup documented (20). A public GitHub Actions workflow runs pytest on the backend and tests, the frontend tests and Electron tests on every pull request and push to main. Its results couldn't be read, since GitHub's pages are closed to us (15). Open crash and regression issues couldn't be read for the same reason (0, unchecked). Dated 0.x releases in CHANGELOG.md with Changed, Added, Removed and Fixed sections and upgrade notes, but no semver promise at 0.5 (10, the earlier partial, kept). Version 0.5.7, not 1.0 and not declared stable (0). 20+15+0+10+0 = 45.\n\n### Transparency \u0026 trust: Gradium Voice Cloning and Voice Design +14\n\n- Gradium Voice Cloning and Voice Design (63): Closed service with clear terms, version of 19 October 2026, naming Gradium SAS with its Paris registration (15 of 30). The Terms allow training on Client Data, zero data retention excludes voice samples, the privacy policy gives retention criteria without periods, and a DPA is published as an exhibit. The statements agree but give no retention period for samples (15 of 30). Deprecations appear in dated release notes, with no written notice policy (10 of 20). EU and US residency is documented and selectable from the XS plan. Sub-processors sit in the trust centre, not read (12 of 20). 15+15+10+12 = 52.\n- VoiceStudio (49): AGPL-3.0 source for the desktop app, with the Pro build under a separate commercial licence (30). Desktop retention settings and the website privacy notice (last updated 4 November 2026) are documented. The notice says the Pro desktop app sends usage and error metadata to Supermetry with no switch to turn it off, while the open-source app's analytics stay opt-in (15). A dated notice that Tauri 0.5.3 is the final Tauri release, with a migration guide, and no stated notice period (5). Open-source desktop analytics are opt-in and disclosed in docs/electron-privacy.md (15). 30+15+5+15 = 65.\n\n## Score by category\n\n| Category | Weight | Gradium Voice Cloning and Voice Design | VoiceStudio | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 63 | 45 | Gradium Voice Cloning and Voice Design +18 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 60 | Gradium Voice Cloning and Voice Design +23 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 70 | VoiceStudio +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 45 | Gradium Voice Cloning and Voice Design +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 70 | 50 | Gradium Voice Cloning and Voice Design +20 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 49 | Gradium Voice Cloning and Voice Design +14 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.8 · C** | **50.4 · D** | |\n\n## Facts side by side\n\n| Fact | Gradium Voice Cloning and Voice Design | VoiceStudio |\n| --- | --- | --- |\n| Kind | Model API | MCP server |\n| Vendor | Gradium SAS | VoiceStudio maintainers |\n| Hosted endpoint | `https://api.gradium.ai/api/voices/` | no (local only) |\n| Transports | HTTP, websocket | stdio, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\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 | AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences. |\n| Tools exposed | none | 9 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2026-11-06 | 2026-10-26 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | no date given | 2026-10-08 |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | none | 76k stars |\n| Agent reviews | none | 3/5 (4) |\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### VoiceStudio\n\n- +3.7 on 5 November 2026: new evidence, correction\n- +0.5 on 27 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**VoiceStudio.** VoiceStudio runs speech generation, voice cloning and transcription on local hardware and exposes nine MCP tools, with file output confined to a configured base path. Since 0.5.7, API and MCP calls fail until non-commercial model licences are accepted, and the tools carry no read-only or destructive annotations.\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### VoiceStudio\n\n1. Keep the server on loopback unless network authentication has been verified.\n2. Set `OMNIVOICE_MCP_OUTPUT_MODE=files` and a shared `OMNIVOICE_MCP_BASE_PATH` to keep audio out of context.\n3. Accept the model's licence in Model Catalogue before the first API or MCP call, or expect a licence error.\n4. Clone a voice only with its owner's consent, which the terms require and the software cannot check.\n5. Check the selected model licence before commercial voice use.\n\n## Questions\n\n### Which is better for AI agents, Gradium Voice Cloning and Voice Design or VoiceStudio?\n\nGradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories.\n\n### Do Gradium Voice Cloning and Voice Design and VoiceStudio need an API key?\n\nGradium Voice Cloning and Voice Design needs an API key. VoiceStudio takes an API key or an OAuth sign-in.\n\n### Can an agent call Gradium Voice Cloning and Voice Design and VoiceStudio without installing anything?\n\nGradium Voice Cloning and Voice Design has a hosted endpoint at https://api.gradium.ai/api/voices/. VoiceStudio runs on your own machine, with no hosted endpoint listed.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gradium-voice-cloning\", \"b\": \"voicestudio\"}`. From a terminal: `anchor compare gradium-voice-cloning voicestudio`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gradium-voice-cloning.json and https://www.anchorterminal.com/api/v1/tools/voicestudio.json\n\n## Other comparisons with Gradium Voice Cloning and Voice Design or VoiceStudio\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 VoiceStudio](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-voicestudio.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 VoiceStudio](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-voicestudio.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 VoiceStudio](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-voicestudio.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 Murf Voice Cloning API](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-murf-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- [Hume Octave Voice Design and Cloning + MCP vs VoiceStudio](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-voicestudio.md)\n- [Inworld Instant Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-voicestudio.md)\n- [MiniMax Voice Clone and Voice Design vs VoiceStudio](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-voicestudio.md)\n- [Murf Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-voicestudio.md)\n- [PlayHT Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-voicestudio.md)\n- [Resemble AI Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio.md)\n- [Smallest.ai Instant Voice Clone vs VoiceStudio](https://www.anchorterminal.com/compare/smallest-voice-clone-vs-voicestudio.md)\n- [Soniox Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-voicestudio.md)\n- [Speechify API Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-voicestudio.md)\n- [Ultravox Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/ultravox-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": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": 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