Benchmarks
Voice AI Benchmarks
Independent, data-driven comparisons of voice AI providers. Every number cited, every source linked.
Head-to-Head Comparisons
STT
Deepgram vs AssemblyAI
Word error rate, latency, and cost per hour for the two leading speech-to-text APIs.
TTS
ElevenLabs vs Cartesia
Voice quality, time-to-first-byte, and pricing for next-gen text-to-speech providers.
S2S
OpenAI Realtime vs Gemini Live
End-to-end latency, turn-taking, and naturalness for speech-to-speech models.
Platform
Vapi vs Retell
Developer experience, pricing, and reliability for voice agent platforms.
Inference
Groq vs Cerebras
Tokens per second, cold start, and cost for ultra-fast LLM inference providers.