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Hume AI vs PolyAI
Hume AI is positioned as hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. PolyAI is positioned as enterprise dialog-agent platform with a
Hume AI is positioned as hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. PolyAI is positioned as enterprise dialog-agent platform with a builder, developer tooling and system integrations. Start by deciding who owns the missing layers, then inspect the documented differences below.
Voice Engines and Enterprise Platforms are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.
8 jointly documented catalog fields. This measures evidence coverage, not equivalent quality or an overall winner.
TTS + EVI API sunset · Announced end: 13 Nov 2026, 05:01 UTC. Read notice & sources →
Test opening hours, booking conflicts and an unanswered transfer.
Start where the records differ.
Values and evidence states are compared together. Shared facts follow the differences; Unknown never means No.
| Decision point | Hume AI | PolyAI |
|---|---|---|
| Billing modelDifferent records | monthly-bundle | per-minute |
| Billing unitDifferent records | Monthly subscription + EVI minutes / TTS characters / supplemental LLM usage | Voice agent minute |
| Bring your telephonyDifferent records | Yes | Yes |
| Bring your modelDifferent records | Yes | Yes |
| WebhooksDifferent records | YesAPI / webhook | YesUnknown |
| Warm transferShared state | Unknown | Unknown |
Your requirements & next steps
Your requirements
Ready-made / AI receptionist · Strict evidence mode
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Subscription includes TTS/EVI/Voice allowances; overage and managed external LLM usage add cost.
Sales-led per-minute contract rate, not a public numerical rate.
Free plan exists; paid entry is not a complete phone-call bill.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Incompatible product allowances are not collapsed into one all-in minute price.
Published unit; precise fee and minimum quote unresolved.
First-month Creator promotion is separate from regular price; Enterprise custom.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Plan-scoped EVI allowance; does not include every third-party carrier/model charge.
No included minute allowance published in reviewed page.
TTS characters, EVI minutes and supplemental model usage remain separate.
Sales-led per-minute service and build credits are documented; no public complete rate/commitment, recurring free entitlement or provider cost inclusions established.
Sales-led per-minute service and build credits are documented; no public complete rate/commitment, recurring free entitlement or provider cost inclusions established.
Not yet researched against this buyer-critical field standard.
Not yet researched against this buyer-critical field standard.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Anyone with this link can view the encoded decision criteria.
Vendor documentation establishes a claim. Public model benchmarks are separate context, not measurements of these platforms.
Open saved comparison ↗What to verify together.
Hume AI
VoiceAgent.best recommends evaluating migration options rather than starting a new long-term TTS or EVI API deployment. This is our editorial judgment; replacement compatibility has not been established.
$3/month Starter; included EVI minutes and overage depend on plan · V3.3 evidence review · Starter subscription reference; EVI 40 minutes; external LLM/telephony extra
Excluded / confirm: Complete cost cannot be established from this reference. Selected external LLM, carrier, token/character consumption and overages prevent a complete cost ceiling from monthly minutes alone. · Hume-managed external LLM usage extra; BYO key/custom model paid outside Hume; Twilio separate
Subscription includes TTS/EVI/Voice allowances; overage and managed external LLM usage add cost.
PolyAI
The public pricing page gives a billing basis, not a numeric quote.
Custom quote / current rate unresolved · V3.3 evidence review · Contract-defined minute billing; no public numeric quote
Excluded / confirm: Complete cost cannot be established from this reference. Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling. · Provider, carrier and custom contract terms require separate verification
Sales-led per-minute contract rate, not a public numerical rate.
The evidence overlap.
Both records have documented values for Product type, Technical setup, Pricing model, OpenAI models, Anthropic models, Transcripts, Checked within 30 days, Retained price snapshot. Matching availability does not measure behavior under your call conditions.
Run the same booking, tool failure and unsuccessful human-transfer cases. Record both outcomes and billable units before signing a deployment agreement.
Review Hume API sunset & migration guidance →