Voiceover (text-to-speech) for apps and AI agents
Text-to-speech APIs and open models for narration and app voices. 19 sources compared on price, license terms and how an agent connects. Read on official pages, checked Oct 10, 2026.
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| Pick for your agent | Source | Price | License | Monetized YouTube | Agent access |
|---|---|---|---|---|---|
| Cartesia Sonic Sonic TTS API (Sonic 3.6 claims 44 languages) with instant and pro voice cloning. |
Free tier · from $5/mo | Commercial: conditions | With conditions | MCP API | |
| ElevenLabs Text-to-speech and voice cloning API in many languages, with an official MCP server. |
Free tier · from $6/mo | Commercial: conditions | With conditions | MCP API | |
| Fish Audio TTS app and pay-as-you-go API priced per UTF-8 byte; S2.1-Pro claims 83 languages. |
Free tier · from $11/mo | Commercial: conditions | With conditions | MCP API | |
| Hume Octave Octave TTS with voice cloning and an official MCP server. |
Free tier · from $3/mo | Commercial: conditions | With conditions | MCP API | |
| Speechify API TTS API (Simba models) with a free plan that lists commercial use. |
Free tier · from $10/mo | Commercial OK | With conditions | API | |
| WellSaid TTS voices with commercial rights on paid plans; API access is available. |
Free tier · from $10/mo | Commercial: conditions | With conditions | API | |
| Chatterbox MIT-licensed open TTS with zero-shot cloning in 23 languages and a built-in Perth watermark. |
Free | Commercial OK No credit | Yes | PyPI | |
| Kokoro-82M 82M-parameter open-weight TTS model under Apache-2.0 with fixed voice packs. |
Free | Commercial OK No credit | Yes | npm | |
| Piper Fast local TTS engine (GPL-3.0) with downloadable voices under per-voice licenses. |
Free | Commercial: conditions Credit varies | With conditions | PyPI | |
| Amazon Polly AWS text-to-speech with Standard, Neural, Long-Form and Generative voices. |
Free tier | Commercial: unclear | Unclear | API | |
| Azure AI Speech (Text to Speech) Azure neural text-to-speech with HD voices, long audio and Limited Access custom voices. |
Free tier | Commercial: unclear | Unclear | API | |
| Deepgram Aura Aura-2 text-to-speech API priced per 1,000 characters. |
Free tier | Commercial: unclear | Unclear | API | |
| Google Cloud Text-to-Speech Cloud TTS with Standard, WaveNet, Neural2, Chirp 3 HD, Studio and Gemini-TTS voices. |
Free tier | Commercial: unclear | Unclear | API | |
| Coqui XTTS-v2 Zero-shot voice-cloning TTS model; weights under the non-commercial Coqui Public Model License. |
Free | Non-commercial | No | PyPI | |
| F5-TTS Zero-shot voice-cloning TTS; code MIT, pre-trained weights CC BY-NC. |
Free | Non-commercial Credit required | No | PyPI | |
| Murf API Murf Falcon 2 TTS API at 1 cent per 1,000 characters, with an official MCP server. |
Falcon 2: '1 cent per 1000 characters' ($10/1M). | Commercial: unclear | Unclear | MCP API | |
| OpenAI Text-to-Speech TTS API (gpt-4o-mini-tts, tts-1, tts-1-hd) with built-in voices and custom voices for eligible customers. |
Pay as you go: tts-1 $15/1M chars; tts-1-hd $30/1M;... | Commercial: unclear | With conditions | API | |
| Resemble AI Hosted TTS and voice cloning API; pricing page now centers on deepfake detection and watermarking. |
No public TTS price; Team plan $350/month (detection-centric). | Commercial: unclear | Unclear | API | |
| LMNT Closed Former TTS API; the company has shut down. |
Paid · on request | Commercial: unclear | Unclear | Download |
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Voice (speech-to-text, text-to-speech) (6 APIs with prices, 6 with a free tier)
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Not legal advice. Each source's page links the license we read; check it before you ship.