These tools competes with
CartesiavsHume EVI
Real-time TTS optimized for conversational AI versus Empathic voice TTS with sub-150ms TTFA
Compare interactively in Explore →Choose Cartesia when…
- •You're building real-time voice agents where latency is critical (<80ms)
- •You need streaming TTS that works well in phone systems
- •You want SSM-based TTS as an alternative to diffusion models
Choose Hume EVI when…
- •You need emotion-aware voice synthesis for character or wellness products
- •Sub-150ms TTFA matters more than the cheapest token price
- •You want a single API for TTS + emotion conditioning
Side-by-side comparison
Field
Cartesia
Hume EVI
Category
Voice AI
Voice AI
Type
Commercial
Commercial
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Pay-as-you-go: $0.09/1000 charsScale: Custom
Starter: From $5/1k charsPro: Custom
GitHub Stars
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Health
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Cartesia
Ultra-low-latency streaming TTS (<80ms) built for real-time voice agents and phone systems. State Space Model architecture (Sonic) delivers natural prosody at production latency.
Hume EVI
Hume AI's Empathic Voice Interface and Octave TTS — emotion-aware text-to-speech with ~150ms TTFA across 20+ languages. Consistently top-5 in 2026 voice-agent platform comparisons.
Shared Connections1 tools both integrate with
Only Cartesia (3)
PlayHTLangGraphHume EVI
Only Hume EVI (1)
Cartesia
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