Inworld AI
Low-latency AI voices and voice-agent infrastructure for developers
Overview
Inworld AI provides Realtime TTS-2 and TTS-2 Flash text-to-speech, speech-to-text with voice profiling, a Realtime API for voice agents, voice cloning and a Router to 220+ LLMs at cost, and has acquired Ultravox. On-Demand starts free; TTS-2 $25 per 1M characters, plans from $25 a month.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 1 Oct 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
- TTS-2 $25/1M chars, Flash $15/1M
- STT $0.15/hour
- 100 custom voices
- Realtime API, commercial licence
- TTS-2 $20/1M chars
- 500 custom voices
- Workspaces and team management
- TTS-2 $17.50/1M chars
- 3,000 custom voices
- Higher concurrency
- TTS-2 $15/1M chars
- 10,000 custom voices
- Priority email support
- TTS-2 $12.50/1M chars
- 30,000 custom voices
- Zero data retention and HIPAA add-ons
- SLA and DPA
- EU and India data residency
- Dedicated account manager
What you can produce with Inworld AI
- Realtime TTS-2 and TTS-2 Flash speech
- Voice cloning and voice design
- Speech-to-text with voice profiling
- Realtime API for voice agents
- Router to 220+ LLMs at cost
- On-premises TTS option
Inworld has turned itself from a game-character platform into a strong voice-infrastructure provider: fast TTS-2 voices, cloning from short samples, profiling speech-to-text and, with Ultravox, a fuller voice-agent stack. Its prices fell sharply in 2026 and drop further on monthly plans. Its leaderboard claims need checking — TTS-2 sits fifth on Artificial Analysis's arena rather than first — and several customer logos are from its gaming era. A good option for developers building real-time voice products; compare voice quality with ElevenLabs on your own scripts.
What we found
Inworld AI began as a platform for AI game characters and now describes itself as a research lab and inference provider for real-time AI at consumer scale. Its main products are text-to-speech models — Realtime TTS-2, generally available since August 2026, and a faster TTS-2 Flash — plus speech-to-text that can profile a speaker's emotion, age, accent and style, a Realtime API for voice agents, and a Router giving access to more than 220 language models from other providers at cost, with no markup. Voices can be cloned from about 15 seconds of audio or designed from a description, and speech covers more than 200 languages and locales. Inworld claims latency under 100 milliseconds for TTS-2 and 25 for Flash. On Artificial Analysis's voice arena Realtime TTS-2 ranked fifth on 1 October 2026; Inworld's claim to the top spot referred to an earlier model. In September 2026 Inworld bought Ultravox, a platform for building real-time voice agents, and an on-premises TTS option is available for H100 GPUs.
Theai, Inc., trading as Inworld AI, is based in Mountain View, California, and was founded in 2021 by Ilya Gelfenbeyn, Kylan Gibbs, its chief executive, and Michael Ermolenko. It raised $50 million at a $500 million valuation in 2023, led by Lightspeed, with Microsoft's M12, Samsung Next and Disney Accelerator among its backers. It holds SOC 2 Type II certification and offers data residency in the EU and India.
After cutting prices in June 2026, Inworld sells usage in dollar credits. The On-Demand plan starts free, with up to 70 minutes of speech included, then charges $25 per million characters for TTS-2, $15 for Flash and $0.15 an hour for transcription. Monthly plans return their fee as credits at lower rates: Creator at $25, Builder at $100, Developer at $300 and Growth at $1,500, where TTS-2 falls to $12.50 per million; Enterprise goes as low as $5. Credits roll over for three months, and yearly billing gives two months free.
It suits developers building voice agents, games and apps who want low-latency speech at falling prices.
Compiled by RECATOOLS from public sources: vendor documentation and pricing, code repositories and published reporting.
About this listing
This entry was compiled from publicly available data including Inworld AI's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with Inworld AI unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
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