Inworld TTS

External

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.

Pricing
Starting at USD5/moView pricing
CategoryVoice Generation & Conversion
Inworld TTS

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. 1.Scalable AI games with millions of players
  2. 2.Real-time conversational AI applications
  3. 3.Voice-enabled consumer apps and telephony
  4. 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

USD 0

Inworld-TTS-1

USD 5

Inworld-TTS-1-Max

USD 10

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