Compare Lab
Fish Audio vs PolyAI
Fish Audio is positioned as a developer speech API and creative voice workspace; paid TTS usage is metered in UTF-8 bytes. PolyAI is positioned as enterprise dialog-agent platform with a builder, developer tooling and system integ
Fish Audio is positioned as a developer speech API and creative voice workspace; paid TTS usage is metered in UTF-8 bytes. 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.
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 | PolyAI |
|---|---|---|
| Billing modelDifferent records | component-stack | per-minute |
| Billing unitDifferent records | TTS: million UTF-8 bytes; ASR: audio hours; Agents: conversation minutes | Voice agent minute |
| Bring your telephonyDifferent records | Yes | Yes |
| Bring your modelDifferent records | Yes | Yes |
| Warm transferDifferent records | Yes | Unknown |
| HIPAA pathDifferent records | Unknown | Yes |
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.
Sales-led per-minute contract rate, not a public numerical rate.
Free TTS model and Agents promotional basic LLM scope are separate.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Each product keeps its own billing unit.
Published unit; precise fee and minimum quote unresolved.
API access; managed numbers have separate rental and enterprise agreement may differ.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Real sessions consume balance including relevant carrier/model charges; no monthly included minutes.
No included minute allowance published in reviewed page.
Destination, transfer and selected model affect cost; no complete ceiling.
Sales-led per-minute service and build credits are documented; no public complete rate/commitment, recurring free entitlement or provider cost inclusions established.
Rates have explicit event/destination scope, not a single maximum.
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.
Call mix, destination, transfer time, selected model/token usage and separate speech products prevent a universal complete monthly/minute ceiling.
Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.
Call mix, destination, transfer time, selected model/token usage and separate speech products prevent a universal complete monthly/minute 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.
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.
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, Call recording, Knowledge base / RAG, Function / tool calling, 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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