Inworld TTS
Inworld TTS is a text-to-speech service available through the web and an API.
What Inworld TTS is
Inworld TTS is a text-to-speech service available through the web and an API. It supports commercial use, voice cloning, and audio output in MP3, WAV, and Opus formats. The service lists support for 200 languages, and the API can stream audio chunks while generating speech. Custom voices can be made from 5 to 15 seconds of audio, or designed from natural-language descriptions without an audio sample. The On-Demand plan starts free with up to 70 minutes of text-to-speech and 400 minutes of speech-to-text. Paid subscriptions include monthly credits: Creator is $25 a month, Builder is $100 a month, Developer is $300 a month, and Growth is $1,500 a month. Unused credits can roll over for up to three months with an active qualifying subscription; overage is charged at the selected plan rate. Yearly billing offers two months free. HIPAA and BAA are available as Growth plan add-ons. The pricing comparison lists GDPR and SOC 2 Type II.
Good
- Free On-Demand tier includes up to 70 TTS minutes.
- Supports commercial use and voice cloning.
- API streams audio as it is generated.
- Output formats include MP3, WAV, and Opus.
- Unused credits can roll over up to three months.
Watch out
- Free On-Demand TTS is limited to 70 minutes.
- HIPAA and BAA are Growth add-ons.
Who it suits
Inworld TTS may suit creators and developers who need speech generation through a web interface or API, including projects that use custom voices. Its plans also include options for teams and larger deployments.
Verdict
Inworld TTS offers a free starting tier, custom voice options, and an API with streaming output. Review the plan credits and rollover conditions against expected usage.
Plans and prices
From Inworld TTS's own pricing page, checked 28 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| On-Demand | Free | Evaluation and prototyping; starts free with up to 70 minutes of TTS included. · Up to 70 min TTS included · 100 custom voices · Start free; TTS-2 is $25 per 1M characters and TTS-2 Flash is $15 per 1M characters. |
| Creator | $25 a month | Content creation and small projects; includes $25 in credits per month. · $25 credits per month · 500 custom voices · 40K chars per TTS Playground request · billed monthly |
| Builder | $100 a month | Growing projects and small teams; includes $100 in credits per month. · $100 credits per month · 3,000 custom voices · billed monthly |
| Developer | $300 a month | Production applications; includes $300 in credits per month. · $300 credits per month · 10,000 custom voices · billed monthly |
| Growth | $1,500 a month | Large deployments and compliance; includes $1,500 in credits per month. · $1,500 credits per month · 30,000 custom voices · 1 professional voice clone · billed monthly |
| Enterprise | Priced on request | Custom pricing, limits, and terms; contact sales. · Custom limits |
The facts
Each one read from Inworld TTS's own pages, with the date it was checked.
Money
- Annual billing discount
- Yearly billing offers two months free.checked 28 Sep 2026
- Free plan
- Yeschecked 20 Sep 2026
- Free STT limit
- The On-Demand plan includes up to 400 minutes of STT for free.checked 28 Sep 2026
- Free tier limit
- The On-Demand plan includes up to 70 minutes of TTS.checked 28 Sep 2026
- Overage billing
- Overage usage is charged at the same rate as the selected plan.checked 28 Sep 2026
What it does
- API access
- Yeschecked 20 Sep 2026
- API streaming
- The API streams audio chunks as the model generates them.checked 28 Sep 2026
- Commercial use
- Yeschecked 20 Sep 2026
- Credit rollover
- Unused subscription credits roll over for up to 3 months with an active qualifying subscription.checked 28 Sep 2026
- Export formats
- MP3,WAV,Opuschecked 20 Sep 2026
- Healthcare compliance
- HIPAA and BAA are available as add-ons on the Growth plan.checked 28 Sep 2026
- Languages
- 200checked 20 Sep 2026
- Language support
- The service supports 200+ languages with native-speaker quality and cross-lingual cloning.checked 28 Sep 2026
- Maximum input
- 40000checked 20 Sep 2026
- Paid from
- 25checked 20 Sep 2026
- Realtime TTS pricing
- Realtime TTS-2 costs as low as $5 per million characters at scale.checked 28 Sep 2026
- Security certifications
- The pricing comparison lists GDPR and SOC 2 Type II.checked 28 Sep 2026
- Support levels
- Support ranges from community support to priority email, AM, and Slack support.checked 28 Sep 2026
- TTS output formats
- Supported output formats include MP3, Linear PCM (WAV), and Opus.checked 28 Sep 2026
- Voice cloning
- Yeschecked 20 Sep 2026
- Voice cloning input
- Custom voices can be created from 5 to 15 seconds of audio.checked 28 Sep 2026
- Voice design
- Voices can be generated from natural-language descriptions without an audio sample.checked 28 Sep 2026
The company
- Company foundation
- Inworld AI copyright is shown as 2021-2026.checked 28 Sep 2026
Where it runs
- Platforms
- web,apichecked 20 Sep 2026
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