Cartesia AI vs Inworld AI
Ultra-low latency voice synthesis vs complete game character engine: Compare for interactive experiences.
Cartesia AI
Voice samples
Natural Conversation
"what is 6 7 anyway?"
Gen Z Slang
"low-key that's such a vibe though"
Educational Content
"the mitochondria is the powerhouse of the cell, and also the only thing i remember from biology"
Inworld AI
Voice samples
Natural Conversation
"what is 6 7 anyway?"
Gen Z Slang
"low-key that's such a vibe though"
Educational Content
"the mitochondria is the powerhouse of the cell, and also the only thing i remember from biology"
About Cartesia AI
Cartesia focuses on ultra-low-latency voice models for real-time agents. Its Sonic 3 streaming TTS emphasizes fast time-to-first-audio, fine-grained prosody control, and developer-friendly WebSocket/SSE APIs.
Sonic 3 (Streaming TTS)
Latest streaming model with industry-leading latency and controls for volume, speed, and emotion.
WebSocket & SSE APIs
Real-time synthesis via WebSocket/SSE with input-streaming to preserve prosody during incremental generation.
Speech-to-Text
Streaming STT for conversational agents that pair with Sonic in low-latency pipelines.
About Inworld AI
Inworld AI offers a full character engine and a modern TTS stack aimed at interactive apps. The platform includes instant/professional voice cloning, rich multilingual TTS with emotion and non-verbal tags, and battle-tested Unity/Unreal SDKs for real-time characters.
Inworld TTS
Low-latency TTS with emotion & non-verbal controls, streaming, and instant cloning.
Character Engine
Runtime pipelines and templates for building AI NPCs with memory, goals, and tools.
Unity & Unreal SDKs
Production-ready SDKs and sample templates for fast game/engine integration.
Professional Voice Cloning
Enterprise fine-tuning for high-fidelity cloned voices (by request).
Transparent Pricing Comparison
Compare pricing and value
Provider
Price per Character
Estimate per Minute*
Estimate per Hour*
Inworld AI
$0.00005
$0.06
$3.73
Cartesia AI
$0.00004
$0.05
$2.93
*this is a best guess estimate
Pricing Summary
Cartesia AI offers approximately 20% lower pricing than Inworld AI for pure TTS functionality with industry-leading sub-90ms latency. Inworld provides a complete character engine with behavior systems, Unity/Unreal SDKs, and game-specific features at slightly higher TTS cost. Choose Cartesia for cost-effective streaming voice synthesis; choose Inworld if you need comprehensive character AI systems with integrated game engine support.
Choose the Right Platform for Your Use Case
Compare voice synthesis speed, game features, and pricing to find your ideal solution.