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Coval vs Hume AI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Public API
Both have one
Best fit
Coval: Product and QA teams shipping voice agents in regulated industries such as finance, insurance or healthcare · Hume AI: Voice AI labs comparing model checkpoints on expression, timing and naturalness
Trust score
About even — Coval 88, Hume AI 91
Status
Both up at our last check — Coval Oct 2, 2026, Hume AI Sep 6, 2026

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

CovalSimulation, monitoring and human review platform for testing and evaluating voice and chat AI agents before and after launch.Hume AIEvaluation platform and expression-measurement APIs for testing how voice AI sounds to people

Side by side

FactCovalHume AI
CategoryLLM Observability & EvaluationVoice Agents & Phone AI
Pricing modelPaidContact
Starts at$100/mo—
Public APIYesYes
Trust score88 / 10091 / 100
PlatformsWeb, APIWeb, API
CompanyDatawave, Inc. (dba Coval)Hume AI, Inc.
Launched20242021
Last verifiedOct 2, 2026Sep 6, 2026

What our research says

Coval

Coval is built for teams that already have a voice or chat agent heading to production and need repeatable evidence that it behaves, which a handful of manual test calls cannot give. It covers simulation, live monitoring and human review under one roof, and the price list is published. It is more tooling than a solo builder prototyping a bot will need, and simulation minutes burn through the cheaper tiers quickly.

Pros

  • Covers simulation, production monitoring and human review in one platform
  • Published tiers with unlimited seats from the Starter plan
  • API, CLI and MCP server fit into existing developer workflows
  • SOC 2 Type II, HIPAA and GDPR coverage is claimed on every plan

Cons

  • Entry price is $100 a month with only 100 simulation minutes
  • Starter retains traces for 30 days and offers email support only
  • The Starter and Growth trial needs a credit card

Hume AI

Hume AI has turned from a voice-model vendor into an evaluation lab for other people's voice AI, and its decade of emotion research makes the expression scoring and human-rater pipeline unusual in that market. It fits labs and companies shipping voice agents that need to know how they sound, not developers looking for a text-to-speech API. Anyone still on Octave TTS or EVI has until 13 November 2026 to migrate, after which account data is deleted.

Pros

  • Expression scoring across hundreds of vocal dimensions in 50+ languages
  • Combines automated metrics with trained human raters in one evaluation loop
  • Public VoiceEQ leaderboard and published methodology
  • Backed by more than ten years of emotion-science research

Cons

  • Octave TTS and EVI APIs end on 13 November 2026
  • No public pricing; every product goes through sales or an access request
  • Expression Measurement API is in limited release

Which one fits

Choose Coval if you need

  • Product and QA teams shipping voice agents in regulated industries such as finance, insurance or healthcare
  • Companies comparing voice-agent vendors on the same scripted scenarios
  • Engineering teams who want regression tests for prompt and model changes

Choose Hume AI if you need

  • Voice AI labs comparing model checkpoints on expression, timing and naturalness
  • Companies deploying voice agents that need structured human and automated evaluation
  • Researchers who need vocal or facial expression scores at scale

Coval vs Hume AI: the questions people ask

Is Coval cheaper than Hume AI?

Coval starts at $100/mo; Hume AI prices on request, so a quote is the only way to compare.

Which has a public API, Coval or Hume AI?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.

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