Inworld TTS
ExternalInworld AI TTS is the #1-ranked text-to-speech model on Hugging Face and Artificial Analysis leaderboards, offering real-time streaming with sub-250ms latency and expressive voice controls. It enables instant voice cloning from just 5-15 seconds of audio, supports 12 languages with cross-lingual capabilities, and delivers affordable pricing at $5 per million characters. Ideal for game developers scaling to millions of users, real-time conversational AI builders, and consumer apps needing natural, high-quality voices.
Description
Inworld AI TTS is the #1-ranked text-to-speech model on Hugging Face and Artificial Analysis leaderboards, offering real-time streaming with sub-250ms latency and expressive voice controls. It enables instant voice cloning from just 5-15 seconds of audio, supports 12 languages with cross-lingual capabilities, and delivers affordable pricing at $5 per million characters. Ideal for game developers scaling to millions of users, real-time conversational AI builders, and consumer apps needing natural, high-quality voices.
Key capabilities
- Real-time streaming TTS with sub-250ms latency
- Instant zero-shot voice cloning from 5-15s audio
- Professional voice cloning with 30+ min audio
- Multilingual support for 12 languages with cross-lingual voices
- Expressive speech via voice tags for emotions and non-verbals
Core use cases
- 1.Scalable AI games with millions of players
- 2.Real-time conversational AI applications
- 3.Voice-enabled consumer apps and telephony
- 4.Low-code/no-code voice integrations
Is Inworld TTS Right for You?
Best for
- Game developers building scalable AI games for cost savings, low latency, and custom support
- Developers creating real-time conversational AI with streaming and voice expressiveness
- Consumer app builders needing affordable, multilingual TTS with custom voice cloning
Not ideal for
- Apps requiring ultra-strict latency without optional feature overheads
- Teams needing immediate high rate limits without approval processes
Standout features
- #1 ranked quality (low WER, high similarity)
- Pricing: $5/1M chars (TTS-1), $10/1M (TTS-1-max)
- Output formats: MP3, WAV, Opus
- Timestamp alignment for captions and lipsync
- Voice parameters: temperature, speed (0.5–1.5×)
- Embedded safeguards, SOC2/GDPR compliance
- Integrations: LiveKit, NLX, Pipecat, Vapi
Pricing
Inworld TTS on-prem
Inworld-TTS-1
Inworld-TTS-1-Max
Reviews
Based on 0 reviews across 0 platforms
User Feedback Highlights
Most Praised
- High-quality speech outperforming ElevenLabs in WER and similarity
- Affordable pricing with >90% cost savings at massive scale
- Realistic, lively voices with easy playground and intuitive cloning
- 5.0/5 rating on Product Hunt
- Low p90 latency (~500ms for first 2s audio)
- Natural interjections, emotions, and multilingual authenticity
Common Complaints
- Timestamp alignment adds ~100ms latency
- Rate limits require approval for high-scale use
- Potential high costs at extreme scale under pay-as-you-go
- TTS-1-Max availability was pending at initial launch