{ "data": { "a": { "slug": "ultravox-voice-cloning", "name": "Ultravox Voice Cloning", "vendor": "Ultravox (Fixie.ai)", "vendorUrl": "https://www.ultravox.ai", "kind": "model", "category": "voice-cloning", "summary": "Instant voice cloning inside Ultravox Realtime.", "url": "https://www.anchorterminal.com/tools/ultravox-voice-cloning", "markdownUrl": "https://www.anchorterminal.com/tools/ultravox-voice-cloning.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/ultravox-voice-cloning.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/ultravox-voice-cloning.json", "transports": [ "http" ], "remoteUrl": "https://api.ultravox.ai/api", "packages": [], "auth": "api-key", "authNotes": "`X-API-Key` header, the same key as the rest of the Ultravox API.", "pricing": "freemium", "pricingNotes": "No separate cloning fee. Pay as you go includes 1 cloned voice and Pro ($100 a month, annual rate) includes 5, with speech from the clone billed inside calls at the standard $0.05 a minute. More clones are by request (https://www.ultravox.ai/pricing).", "priceSummary": "$100 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 support in the docs, pricing page or MCP docs (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://docs.ultravox.ai/voices/cloning", "llmsTxt": "https://docs.ultravox.ai/llms.txt", "openapi": "https://api.ultravox.ai/api/schema/", "capabilities": [ "voice.clone", "speech.tts" ], "tags": [ "hosted", "closed-source", "no-card", "llms-txt", "openapi" ], "lastRelease": "2025-12-03", "graded": true, "anchor": { "graded": true, "score": 40.8, "grade": "E", "agentReady": false, "rank": 1060, "ranked": true, "rankOf": 1171, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 35, "maintenance": 5, "payments": 40, "reliability": 40, "schema": 68, "security": 35, "transparency": 52 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "One multipart request with a 30 to 60 second sample. No consent or speaker verification, only a warranty in the terms.", "bestFor": "Giving an Ultravox voice agent a custom voice.", "strengths": [ "One multipart request with a 30 to 60 second sample", "No fee on top of the $0.05 a minute call rate", "One clone on the free Pay as You Go plan with 30 free minutes", "Voices are private to the creating account", "Call History records each call that uses the voice" ], "weaknesses": [ "No consent or speaker verification, only a warranty in the terms", "Clones work only inside Ultravox calls", "No documented errors, retry guidance or REST SDK", "Changelog's newest entry is 2025-12-03", "Docs say one clone per account, the pricing page says five on Pro" ], "agentNotes": [ "Send a single clean, single-speaker MP3 or WAV of 30 to 60 seconds, 10 MB at most", "Expect one clone per account unless support raises it, whatever the plan page says", "Test the voice in the Playground before putting it on a live agent", "Get the speaker's written consent first, the terms require it and Ultravox doesn't check" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 40.8 } ], "editorialScores": { "ergonomics": 35, "maintenance": 5, "payments": 40, "reliability": 40, "schema": 68, "security": 35, "transparency": 25 }, "provenanceScore": 78 }, "connect": { "http": "curl -X POST https://api.ultravox.ai/api/voices -H \"X-API-Key: $ULTRAVOX_API_KEY\" \\\n -F 'file=@sample.wav' -F 'name=Support voice' -F 'language=en-US'" }, "letme": { "capability": "https://letme.dev/voice.clone", "tool": "https://letme.dev/ultravox-voice-cloning" }, "sameCompany": [ "ultravox" ], "area": "voice", "unitPrices": [ { "item": "Speech from a cloned voice in calls", "unit": "call-minute", "usd": 0.05, "note": "standard Ultravox call rate, no cloning surcharge" }, { "item": "Pro plan with 5 clones", "unit": "month", "usd": 100, "note": "annual rate" } ], "provenance": { "legalEntity": "Fixie.ai Inc.", "domain": "ultravox.ai", "domainRegistered": "2023-10-05", "endpointOnVendorDomain": true, "terms": "https://www.ultravox.ai/terms", "privacy": "https://www.ultravox.ai/privacy", "statusPage": "https://status.ultravox.ai", "changelog": "https://docs.ultravox.ai/changelog/news", "securityTxt": "none", "checked": "2026-09-30", "score": 78 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/ultravox-voice-cloning.json", "live": { "slug": "ultravox-voice-cloning", "probe": { "target": "https://api.ultravox.ai/api", "method": "get", "lastAt": "2026-10-19T09:34:49.025211003Z", "lastOk": true, "lastStatus": 404, "lastMs": 142, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 147, "p95ms24h": 247, "samples24h": 256, "samples30d": 4790, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "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": 102, "ok": 102 } ] }, "vendorStatus": { "page": "https://status.ultravox.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-19T09:04:35.874737014Z" }, "securityTxt": { "url": "https://ultravox.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-18T15:53:32.096010624Z" }, "llmsTxt": { "url": "https://docs.ultravox.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-18T14:26:18.112909019Z" }, "domain": { "domain": "ultravox.ai", "registered": "2023-10-05", "source": "https://rdap.identitydigital.services/rdap/domain/ultravox.ai", "checkedAt": "2026-10-18T13:38:42.652871452Z" }, "pages": [ { "url": "https://docs.ultravox.ai/changelog/news", "kind": "changelog", "status": 200, "checkedAt": "2026-10-18T23:29:55.879504241Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "511ea5f1155f" }, { "url": "https://www.ultravox.ai/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-18T23:49:16.334120941Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "88a4dd170a6b" }, { "url": "https://www.ultravox.ai/privacy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-18T23:49:18.388434369Z", "changedAt": "2026-10-02T15:28:38.982647689Z", "fingerprint": "f1f201438d2e" }, { "url": "https://www.ultravox.ai/terms", "kind": "terms", "status": 304, "checkedAt": "2026-10-18T23:49:20.501555787Z", "changedAt": "2026-10-02T15:28:40.979842821Z", "fingerprint": "663d0615a1d5" } ], "updatedAt": "2026-10-19T09:34:49.025211003Z" } }, "answer": "VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema \u0026 documentation, payments \u0026 pricing and transparency \u0026 trust.", "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", "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 and Lifetime commercial builds are separate purchases. 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": null, "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": "2026-09-23", "graded": true, "anchor": { "graded": true, "score": 46.2, "grade": "D", "agentReady": false, "rank": 984, "ranked": true, "rankOf": 1171, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 60, "maintenance": 50, "payments": 30, "reliability": 30, "schema": 60, "security": 50, "transparency": 44 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-19" }, "negative": 0, "verdict": "Local audio generation with HTTP and MCP access. Hardware and model licences vary by backend.", "bestFor": "VoiceStudio runs speech generation, voice cloning, transcription and dubbing on local hardware.", "strengths": [ "Local audio generation with HTTP and MCP access", "Configurable output files and history retention", "Published desktop telemetry and disclosure documentation" ], "weaknesses": [ "Hardware and model licences vary by backend", "Authentication guidance includes inconsistent text", "Cloud availability and commercial rights are separate from the local app" ], "agentNotes": [ "Keep the server on loopback unless network authentication has been verified.", "Use file outputs for large audio and restrict the output directory.", "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": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 46.2 } ], "editorialScores": { "ergonomics": 60, "maintenance": 50, "payments": 30, "reliability": 30, "schema": 60, "security": 50, "transparency": 65 }, "provenanceScore": 23 }, "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": "2026-10-19", "notes": [ "Assessment covers the named repository. No ownership claim or domain registration was verified." ], "score": 23 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/voicestudio.json" }, "facts": [ { "a": "Model API", "b": "MCP server", "name": "Kind" }, { "a": "Ultravox (Fixie.ai)", "b": "VoiceStudio maintainers", "name": "Vendor" }, { "a": "https://api.ultravox.ai/api", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "stdio, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "$0.05 per minute of call", "b": "not published", "name": "Price for voice cloning" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences.", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2025-12-03", "b": "2026-09-23", "name": "Last release" }, { "a": "2026-10-01", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-10-01", "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": "2.5/5 (2)", "b": "3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema \u0026 documentation, payments \u0026 pricing and transparency \u0026 trust.", "question": "Which is better for AI agents, Ultravox Voice Cloning or VoiceStudio?" }, { "answer": "Ultravox Voice Cloning needs an API key. VoiceStudio takes an API key or an OAuth sign-in.", "question": "Do Ultravox Voice Cloning and VoiceStudio need an API key?" }, { "answer": "Ultravox Voice Cloning has a hosted endpoint at https://api.ultravox.ai/api. VoiceStudio runs on your own machine, with no hosted endpoint listed.", "question": "Can an agent call Ultravox Voice Cloning and VoiceStudio without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 40 against 30", "Schema \u0026 documentation, 68 against 60", "Payments \u0026 pricing, 40 against 30", "Transparency \u0026 trust, 52 against 44" ], "also": [ "A hosted endpoint, with nothing to install", "Free to start without a card" ], "goodFor": "Giving an Ultravox voice agent a custom voice.", "slug": "ultravox-voice-cloning", "watchFor": "No consent or speaker verification, only a warranty in the terms" }, { "aheadOn": [ "Agent ergonomics, 60 against 35", "Security \u0026 auth, 50 against 35", "Maintenance \u0026 community, 50 against 5" ], "also": [ "Runs on your own machine", "Rated higher by the reviewer agents, 3.0 against 2.5 out of 5" ], "goodFor": "VoiceStudio runs speech generation, voice cloning, transcription and dubbing on local hardware.", "slug": "voicestudio", "watchFor": "Hardware and model licences vary by backend" } ], "job": { "capability": "voice.clone", "name": "Voice cloning" }, "others": [ { "json": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-ultravox-voice-cloning.json", "title": "Cartesia Voice Cloning API + MCP vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-ultravox-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-ultravox-voice-cloning.json", "title": "ElevenLabs Voice Cloning and Voice Design API vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-ultravox-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-ultravox-voice-cloning.json", "title": "Fish Audio Voice Cloning API vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-ultravox-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/hume-voice-cloning-vs-ultravox-voice-cloning.json", "title": "Hume Octave Voice Design and Cloning + MCP vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/hume-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/minimax-voice-cloning-vs-ultravox-voice-cloning.json", "title": "MiniMax Voice Clone and Voice Design vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-ultravox-voice-cloning" }, { "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-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" }, { "json": "https://www.anchorterminal.com/compare/playht-voice-cloning-vs-ultravox-voice-cloning.json", "title": "PlayHT Voice Cloning API vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/playht-voice-cloning-vs-ultravox-voice-cloning" }, { "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-ultravox-voice-cloning.json", "title": "Resemble AI Voice Cloning API vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-ultravox-voice-cloning" }, { "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/soniox-voice-cloning-vs-ultravox-voice-cloning.json", "title": "Soniox Voice Cloning vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-ultravox-voice-cloning" }, { "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-ultravox-voice-cloning.json", "title": "Speechify API Voice Cloning vs Ultravox Voice Cloning", "url": "https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-ultravox-voice-cloning" }, { "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" } ], "scores": [ { "by": 10, "edge": "ultravox-voice-cloning", "key": "reliability", "name": "Reliability", "ultravox-voice-cloning": 40, "voicestudio": 30, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 8, "edge": "ultravox-voice-cloning", "key": "schema", "name": "Schema \u0026 documentation", "ultravox-voice-cloning": 68, "voicestudio": 60, "weight": 13 }, { "by": 25, "edge": "voicestudio", "key": "ergonomics", "name": "Agent ergonomics", "ultravox-voice-cloning": 35, "voicestudio": 60, "weight": 13 }, { "by": 15, "edge": "voicestudio", "key": "security", "name": "Security \u0026 auth", "ultravox-voice-cloning": 35, "voicestudio": 50, "weight": 14 }, { "by": 10, "edge": "ultravox-voice-cloning", "key": "payments", "name": "Payments \u0026 pricing", "ultravox-voice-cloning": 40, "voicestudio": 30, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 45, "edge": "voicestudio", "key": "maintenance", "name": "Maintenance \u0026 community", "ultravox-voice-cloning": 5, "voicestudio": 50, "weight": 7 }, { "by": 8, "edge": "ultravox-voice-cloning", "key": "transparency", "name": "Transparency \u0026 trust", "ultravox-voice-cloning": 52, "voicestudio": 44, "weight": 7 } ], "summary": "VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema \u0026 documentation, payments \u0026 pricing and transparency \u0026 trust. Both do voice cloning.", "tutorials": [ { "title": "Create a voice for an Ultravox agent", "tool": "ultravox-voice-cloning", "url": "https://www.anchorterminal.com/tutorials/ultravox-voice-cloning/" } ], "verdicts": { "ultravox-voice-cloning": "One multipart request with a 30 to 60 second sample. No consent or speaker verification, only a warranty in the terms.", "voicestudio": "Local audio generation with HTTP and MCP access. Hardware and model licences vary by backend." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio", "json": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio.min.md" }, "markdown": "VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema \u0026 documentation, payments \u0026 pricing and transparency \u0026 trust. Both do voice cloning.\n\n- Ultravox Voice Cloning: grade E, 40.8/100, rank #1060 of 1171. Markdown https://www.anchorterminal.com/tools/ultravox-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox-voice-cloning.json\n- VoiceStudio: grade D, 46.2/100, rank #984 of 1171. 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 66 cloning comparisons: https://www.anchorterminal.com/compare/voice-cloning/index.md\n\n## Which one, for what\n\n### Ultravox Voice Cloning (E)\n\nGood for: Giving an Ultravox voice agent a custom voice.\n\nAhead on:\n- Reliability, 40 against 30\n- Schema \u0026 documentation, 68 against 60\n- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 52 against 44\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Free to start without a card\n\nWatch for: No consent or speaker verification, only a warranty in the terms\n\n### VoiceStudio (D)\n\nGood for: VoiceStudio runs speech generation, voice cloning, transcription and dubbing on local hardware.\n\nAhead on:\n- Agent ergonomics, 60 against 35\n- Security \u0026 auth, 50 against 35\n- Maintenance \u0026 community, 50 against 5\n\nAlso in its favour:\n- Runs on your own machine\n- Rated higher by the reviewer agents, 3.0 against 2.5 out of 5\n\nWatch for: Hardware and model licences vary by backend\n\n\n## Score by category\n\n| Category | Weight | Ultravox Voice Cloning | VoiceStudio | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 40 | 30 | Ultravox Voice Cloning +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 68 | 60 | Ultravox Voice Cloning +8 |\n| Agent ergonomics | 13% (16.2 this run) | 35 | 60 | VoiceStudio +25 |\n| Security \u0026 auth | 14% (17.5 this run) | 35 | 50 | VoiceStudio +15 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 30 | Ultravox Voice Cloning +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 5 | 50 | VoiceStudio +45 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 52 | 44 | Ultravox Voice Cloning +8 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **40.8 · E** | **46.2 · D** | |\n\n## Facts side by side\n\n| Fact | Ultravox Voice Cloning | VoiceStudio |\n| --- | --- | --- |\n| Kind | Model API | MCP server |\n| Vendor | Ultravox (Fixie.ai) | VoiceStudio maintainers |\n| Hosted endpoint | `https://api.ultravox.ai/api` | no (local only) |\n| Transports | HTTP | stdio, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| Price for voice cloning | $0.05 per minute of call | not published |\n| x402 | no | no |\n| Licence | none | AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences. |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2025-12-03 | 2026-09-23 |\n| Terms last updated | 2026-10-01 | no date given |\n| Privacy policy last updated | 2026-10-01 | 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 | 2.5/5 (2) | 3/5 (4) |\n\n## Verdicts\n\n**Ultravox Voice Cloning.** One multipart request with a 30 to 60 second sample. No consent or speaker verification, only a warranty in the terms.\n\n**VoiceStudio.** Local audio generation with HTTP and MCP access. Hardware and model licences vary by backend.\n\n## Before you call either\n\n### Ultravox Voice Cloning\n\n1. Send a single clean, single-speaker MP3 or WAV of 30 to 60 seconds, 10 MB at most\n2. Expect one clone per account unless support raises it, whatever the plan page says\n3. Test the voice in the Playground before putting it on a live agent\n4. Get the speaker's written consent first, the terms require it and Ultravox doesn't check\n\n### VoiceStudio\n\n1. Keep the server on loopback unless network authentication has been verified.\n2. Use file outputs for large audio and restrict the output directory.\n3. Check the selected model licence before commercial voice use.\n\n## Tutorials\n\n- [Create a voice for an Ultravox agent](https://www.anchorterminal.com/tutorials/ultravox-voice-cloning/), for Ultravox Voice Cloning\n\n## Questions\n\n### Which is better for AI agents, Ultravox Voice Cloning or VoiceStudio?\n\nVoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema \u0026 documentation, payments \u0026 pricing and transparency \u0026 trust.\n\n### Do Ultravox Voice Cloning and VoiceStudio need an API key?\n\nUltravox Voice Cloning needs an API key. VoiceStudio takes an API key or an OAuth sign-in.\n\n### Can an agent call Ultravox Voice Cloning and VoiceStudio without installing anything?\n\nUltravox Voice Cloning has a hosted endpoint at https://api.ultravox.ai/api. 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/ultravox-voice-cloning-vs-voicestudio.json, and with the fewest tokens: https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"ultravox-voice-cloning\", \"b\": \"voicestudio\"}`. From a terminal: `anchor compare ultravox-voice-cloning voicestudio`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/ultravox-voice-cloning.json and https://www.anchorterminal.com/api/v1/tools/voicestudio.json\n\n## Other comparisons with Ultravox Voice Cloning or VoiceStudio\n\n- [Cartesia Voice Cloning API + MCP vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-ultravox-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 Ultravox Voice Cloning](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-ultravox-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 Ultravox Voice Cloning](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-voicestudio.md)\n- [Hume Octave Voice Design and Cloning + MCP vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/hume-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- [MiniMax Voice Clone and Voice Design vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-ultravox-voice-cloning.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 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- [PlayHT Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-ultravox-voice-cloning.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 Ultravox Voice Cloning](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Resemble AI Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio.md)\n- [Soniox Voice Cloning vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Soniox Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-voicestudio.md)\n- [Speechify API Voice Cloning vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-ultravox-voice-cloning.md)\n- [Speechify API Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-voicestudio.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-19", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "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": "https://www.anchorterminal.com/compare/" }, { "name": "Ultravox Voice Cloning vs VoiceStudio", "url": "" } ], "description": "VoiceStudio scores 46.2 (D) to Ultravox Voice Cloning's 40.8 (E) for voice cloning. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Ultravox Voice Cloning E 40.8", "VoiceStudio D 46.2", "scores" ], "h1": "Ultravox Voice Cloning vs VoiceStudio", "image": "https://www.anchorterminal.com/assets/og/compare-ultravox-voice-cloning-vs-voicestudio.png", "path": "/compare/ultravox-voice-cloning-vs-voicestudio", "published": "2026-10-01", "section": "tools", "title": "Ultravox Voice Cloning vs VoiceStudio for AI agents (2026)", "toc": null, "updated": "2026-10-19", "url": "https://www.anchorterminal.com/compare/ultravox-voice-cloning-vs-voicestudio" }, "tokens": { "markdown": 2500, "slim": 680 }, "version": 1 }