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Fish Audio vs Speechmatics
Fish Audio is positioned as a developer speech API and creative voice workspace; paid TTS usage is metered in UTF-8 bytes. Speechmatics is positioned as recognition APIs with cloud and private-deployment choices for transcription-
Fish Audio is positioned as a developer speech API and creative voice workspace; paid TTS usage is metered in UTF-8 bytes. 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.
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 | Fish Audio | Speechmatics |
|---|---|---|
| Billing unitDifferent records | TTS: million UTF-8 bytes; ASR: audio hours; Agents: conversation minutes | 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 |
| HIPAA pathDifferent records | Unknown | Yes |
| WebhooksDifferent records | YesAPI / webhook | YesUnknown |
Your requirements & next steps
Your requirements
Ready-made / AI receptionist · Strict evidence mode
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TTS uses UTF-8 bytes, ASR audio hours, Agents minutes plus carrier/model/add-ons. Multiple products must not share a fabricated normalized unit.
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 TTS model and Agents promotional basic LLM scope are separate.
Price page exposes a Pro 0.129 figure without a clear unit in captured content; exact model rate and enterprise commitment require confirmation.
Each product keeps its own billing unit.
Billing currency versus usage unit kept distinct.
API access; managed numbers have separate rental and enterprise agreement may differ.
No fixed subscription number inferred from credit billing.
Real sessions consume balance including relevant carrier/model charges; no monthly included minutes.
Existing pre-August accounts have different transition grant.
Destination, transfer and selected model affect cost; no complete ceiling.
No forced per-minute bundle conversion.
Rates have explicit event/destination scope, not a single maximum.
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.
Call mix, destination, transfer time, selected model/token usage and separate speech products prevent a universal complete monthly/minute ceiling.
Speech component credits and contract-specific workloads do not determine full voice-agent cost; external LLM/hosting/telephony unknown.
Call mix, destination, transfer time, selected model/token usage and separate speech products prevent a universal complete monthly/minute ceiling.
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.
Fish Audio
UTF-8 bytes and characters are not interchangeable for multilingual scripts.
TTS $15/M UTF-8 bytes; ASR $0.36/audio hour; Agents $0.06/min + applicable surcharges · V3.3 evidence review · TTS API reference; Voice Agents beta has separate minute-based billing
Excluded / confirm: Complete cost cannot be established from this reference. Call mix, destination, transfer time, selected model/token usage and separate speech products prevent a universal complete monthly/minute ceiling. · Phone destination surcharge, $1.20/month managed number, cold $0.015/min or warm $0.025/min post-transfer, non-basic LLM tokens; BYO carrier separate
TTS uses UTF-8 bytes, ASR audio hours, Agents minutes plus carrier/model/add-ons. Multiple products must not share a fabricated normalized unit.
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, Free trial, Realtime / streaming audio, 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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