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Retell AI vs Speechmatics
Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. Speechmatics is positioned as recognition APIs with cloud and private-deployment choices for transcription-heavy
Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. 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.
Full Platforms and STT 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.
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 | Retell AI | Speechmatics |
|---|---|---|
| Billing unitDifferent records | minute | 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 |
| Warm transferDifferent records | Yes | Unknown |
| WebhooksDifferent records | YesAPI / webhook | YesUnknown |
| Billing modelShared state | component-stack | component-stack |
Your requirements & next steps
Your requirements
Ready-made / AI receptionist · Strict evidence mode
No personal requirements yet. Add criteria in Advanced Filter to prioritize this comparison.
Reviewed current public offer; retain original billing scope and units.
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.
Reviewed current public offer; retain original billing scope and units.
Price page exposes a Pro 0.129 figure without a clear unit in captured content; exact model rate and enterprise commitment require confirmation.
Reviewed current public offer; retain original billing scope and units.
Billing currency versus usage unit kept distinct.
Zero platform fee is not zero total fixed cost.
No fixed subscription number inferred from credit billing.
Paid extras$8/slot/month and$8/KB/month; usage separate.
Existing pre-August accounts have different transition grant.
Reviewed current public offer; retain original billing scope and units.
No forced per-minute bundle conversion.
Reviewed current public offer; retain original billing scope and units.
Buyer-selected component costs sit outside speech API usage.
Reviewed current public offer; retain original billing scope and units.
Not yet researched against this buyer-critical field standard.
A headline configuration range is not a ceiling on telephony, model, add-on or burst charges.
Speech component credits and contract-specific workloads do not determine full voice-agent cost; external LLM/hosting/telephony unknown.
Research conclusion about cost completeness, not a vendor capability.
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.
Retell AI
The advertised price band is not a ceiling for every model configuration.
Voice-agent configuration range $0.07–$0.31/min · V3.3 evidence review · Published configured-agent range lower reference; not a guaranteed all-in floor or ceiling
Excluded / confirm: Complete cost cannot be established from this reference. A headline configuration range is not a ceiling on telephony, model, add-on or burst charges. · Telephony, selected LLM/TTS, add-ons and concurrency burst can add charges
Reviewed current public offer; retain original billing scope and units.
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, 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.
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