Pick Coval if
voice-agent teams who will pay $100 / mo for 100 simulation minutes.
Read the Coval pageCoval vs Retell
Our take
Pick Coval if you're on a voice-agent team who will pay $100 / mo for 100 simulation minutes. Pick Retell if you're on a team that want a voice agent today and will pay minutes + add-ons, without an annual commit. Skip Coval if you're people who only need a prompt eval YAML (Promptfoo). Skip Retell if you're buyers who want one all-in minute that already includes the LLM (Bland).
Best for
Coval Measure the agent before customers hear it
Retell A phone or chat agent billed by the minute
Free plan
Coval No free plan
Retell $0 · to start. Retell Voice Infra $0.055/min. Platform voices / Minimax / Fish / Cartesia / OpenAI / Inworld TTS $0.015/min. ElevenLabs Flash $0.040/min (higher ElevenLabs rows on the same table). LLM rows are per-minute (example GPT 4.1 $0.045/min). 20 concurrent included
Lowest paid
Coval Enterprise $4
Retell Telephony $0.015
Next step up
Coval Starter $100
Retell Monthly add-ons $2/mo
Coding agent
Coval Simulations
Retell Simulation testing
Watch out
Coval No public $0 plan
Retell Infra is not the all-in rate
Last checked
Coval 2026-10-28 · coval.ai/pricing
Retell 2026-10-22 · retellai.com/pricing
Which one, then?
Pick Retell if
teams that want a voice agent today and will pay minutes + add-ons, without an annual commit.
Read the Retell page