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Cartesia vs Pipecat
Cartesia is positioned as speech models for teams assembling a voice stack, with a separate managed-agent product. Pipecat is positioned as open-source Python orchestration for a voice stack assembled by developers. Start by decid
Cartesia is positioned as speech models for teams assembling a voice stack, with a separate managed-agent product. Pipecat is positioned as open-source Python orchestration for a voice stack assembled by developers. Start by deciding who owns the missing layers, then inspect the documented differences below.
Voice Engines and Developer Frameworks are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.
10 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 | Cartesia | Pipecat |
|---|---|---|
| Billing unitDifferent records | TTS/STT credits; Managed Agents conversation minutes | Active/reserved agent minute; participant minute; telephony minute; SIP REFER event |
| Bring your modelDifferent records | Yes | Yes |
| Warm transferDifferent records | Unknown | Yes |
| WebhooksDifferent records | YesAPI / webhook | YesUnknown |
| Billing modelShared state | component-stack | component-stack |
| Bring your telephonyShared state | Yes | Yes |
Your requirements & next steps
Your requirements
Ready-made / AI receptionist · Strict evidence mode
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TTS/STT credit subscriptions and Managed Agents minute charges remain separate.
Framework open source; Cloud compute, reservation, transport, recording and providers separately priced.
Speech model credits and selected LLM/evaluation charges have separate scope.
Compute only. Transport/models/recording and reserved idle time excluded.
Product-specific units preserved.
Different units cannot be normalized without usage and provider assumptions.
Plan allowances include separate agent prepayment; do not double-count as universal included voice minutes.
Public component table and Enterprise sales path were reviewed; an exact platform subscription floor, contractual minimum and billing-rounding policy were not established. Per-minute display alone does not prove per-second metering.
Separate credit and agent budgets; no arbitrary cross-product minute conversion.
Does not make hosting or model inference free.
Free allowances and product rates are available; old changelog, bandwidth trial and speech volume controls do not establish these current billing terms.
This is the audio-filter allowance overage, not an all-in call rate.
LLM promotion ends October 1, 2026; quoted model/usage mix determines bill.
Enterprise integrated inference billing by agreement.
Not yet researched against this buyer-critical field standard.
Not yet researched against this buyer-critical field standard.
Product mix, LLM promotion expiry, carrier routing and other metered components prevent a universal all-in ceiling.
No all-in ceiling from minutes alone: reservation, transport, providers, recording and carrier legs vary.
Product mix, LLM promotion expiry, carrier routing and other metered components prevent a universal all-in ceiling.
No all-in ceiling from minutes alone: reservation, transport, providers, recording and carrier legs vary.
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.
Cartesia
A speech credit plan is not a complete phone-call bill.
Managed Agents $0.06/min; Cartesia-provided-number telephony $0.014/min · V3.3 evidence review · Managed Agents base rate; carrier/model charges and prepaid plan balances separate
Excluded / confirm: Complete cost cannot be established from this reference. Product mix, LLM promotion expiry, carrier routing and other metered components prevent a universal all-in ceiling. · LLM tokens after promotional coverage; telephony and evaluation usage
TTS/STT credit subscriptions and Managed Agents minute charges remain separate.
Pipecat
Free framework licensing does not cover inference, hosting or carriers.
agent-1x active $0.01/min, reserved $0.0005/min; agent-2x $0.02/$0.001; agent-3x $0.03/$0.0015 · V3.3 evidence review · Pipecat Cloud agent-1x active compute only; reserved runtime/provider/carrier bills extra
Excluded / confirm: Complete cost cannot be established from this reference. No all-in ceiling from minutes alone: reservation, transport, providers, recording and carrier legs vary. · LLM/STT/TTS provider invoices, transport, telephony, reserved runtime, recording and storage
Framework open source; Cloud compute, reservation, transport, recording and providers separately priced.
The evidence overlap.
Both records have documented values for Product type, Technical setup, Pricing model, Published numeric pricing, Cartesia TTS, Realtime / streaming audio, Function / tool calling, Official product documentation, 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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