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Hume AI vs Speechmatics
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. Speechmatics is positioned as recognition APIs with cloud and pr
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. Speechmatics is positioned as recognition APIs with cloud and private-deployment choices for transcription-heavy products. Start by deciding who owns the missing layers, then inspect the documented differences below.
Voice Engines and STT are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.
9 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 | Speechmatics |
|---|---|---|
| Billing modelDifferent records | monthly-bundle | component-stack |
| Billing unitDifferent records | Monthly subscription + EVI minutes / TTS characters / supplemental LLM usage | Credits (1 credit = $1); product-specific per-hour rates, calculated to the second |
| Bring your telephonyDifferent records | Yes | Unknown |
| Bring your modelDifferent records | Yes | Not applicable |
| 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.
Credit billing: one credit equals $1; usage measured by product hours/seconds. This does not mean a character-priced TTS rate or flat agent minute rate.
Free plan exists; paid entry is not a complete phone-call bill.
Price page exposes a Pro 0.129 figure without a clear unit in captured content; exact model rate and enterprise commitment require confirmation.
Incompatible product allowances are not collapsed into one all-in minute price.
Billing currency versus usage unit kept distinct.
First-month Creator promotion is separate from regular price; Enterprise custom.
No fixed subscription number inferred from credit billing.
Plan-scoped EVI allowance; does not include every third-party carrier/model charge.
Existing pre-August accounts have different transition grant.
TTS characters, EVI minutes and supplemental model usage remain separate.
No forced per-minute bundle conversion.
Buyer-selected component costs sit outside speech API usage.
Not yet researched against this buyer-critical field standard.
Not yet researched against this buyer-critical field standard.
Speech component credits and contract-specific workloads do not determine full voice-agent cost; external LLM/hosting/telephony unknown.
Speech component credits and contract-specific workloads do not determine full voice-agent cost; external LLM/hosting/telephony unknown.
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.
Speechmatics
The lowest advertised batch price is not a real-time price.
Pro self-serve PAYG; Enterprise contract billing · V3.3 evidence review · STT exact-second metering billed in audio hours; no verified current complete rate schedule
Excluded / confirm: Complete cost cannot be established from this reference. Speech component credits and contract-specific workloads do not determine full voice-agent cost; external LLM/hosting/telephony unknown. · External LLM, orchestrator, telephony and application hosting
Credit billing: one credit equals $1; usage measured by product hours/seconds. This does not mean a character-priced TTS rate or flat agent minute rate.
The evidence overlap.
Both records have documented values for Product type, Technical setup, Pricing model, Published numeric pricing, Realtime / streaming audio, Transcripts, Published included concurrency at least, 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 →