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Comparison LabCompare 27 voice AI platforms and components across seven buying contexts, with sourced capabilities, current price captures and visible unknowns.Voice AI Price Index: prices, evidence and historyUnderstand the complete voice-agent cost stack: models, voice, transcription, telephony, subscriptions, capacity and add-ons.Know the cost before the first callEstimate monthly voice-agent costs, AI minutes, setup expenses and volume scenarios using your own transparent assumptions.AI voice agents for dentalAppointments, rescheduling and after-hours calls—with a person ready for clinical questions. Explore call flows, safe automation, integrations, tests and cost considerations.

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Hermes vs Pipecat

Hermes is positioned as an agency operations layer bundling voice providers, client workspaces and billing. Pipecat is positioned as open-source Python orchestration for a voice stack assembled by developers. Start by deciding who

The decision in context

Hermes is positioned as an agency operations layer bundling voice providers, client workspaces and billing. 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.

Full Platforms and Developer Frameworks are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.

6 jointly documented catalog fields. This measures evidence coverage, not equivalent quality or an overall winner.

Compare for the job

Test opening hours, booking conflicts and an unanswered transfer.

2 of 4 slots
HermesPipecat
Decision signals / differences first

Start where the records differ.

7 of 8 priority fields differ

Values and evidence states are compared together. Shared facts follow the differences; Unknown never means No.

Selected platforms: buyer-critical differences before detailed dimensions
Decision pointHermesPipecat
Billing modelDifferent records
monthly-bundleVerified Yes · 2026-09-28Documented product/configuration only; see research notes · Private beta; Starter
component-stackVerified Yes · 2026-09-28
Billing unitDifferent records
monthVerified Yes · 2026-09-28Documented product/configuration only; see research notes · Private beta; Starter
Active/reserved agent minute; participant minute; telephony minute; SIP REFER eventVerified Yes · 2026-09-28
Bring your telephonyDifferent records
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
YesConditional · 2026-09-28
Bring your modelDifferent records
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
YesVerified Yes · 2026-09-28
Warm transferDifferent records
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
YesConditional · 2026-09-28Daily PSTN example implementation
HIPAA pathDifferent records
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
YesVendor claim · 2026-09-28Enabled Pipecat Cloud account
Your requirements & next steps
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Ready-made / AI receptionist · Strict evidence mode

No personal requirements yet. Add criteria in Advanced Filter to prioritize this comparison.

Unknown ≠ No
Evidence, side by sideNo benchmark scores
HermesFull Platforms
PipecatDeveloper Frameworks
Pricing model
Hermes
monthly-bundleVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
component-stackVerified Yes · 2026-09-28

Framework open source; Cloud compute, reservation, transport, recording and providers separately priced.

Headline / base price
Hermes
Starter $149/monthVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
agent-1x active $0.01/min, reserved $0.0005/min; agent-2x $0.02/$0.001; agent-3x $0.03/$0.0015Verified Yes · 2026-09-28

Compute only. Transport/models/recording and reserved idle time excluded.

Billing unit
Hermes
monthVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
Active/reserved agent minute; participant minute; telephony minute; SIP REFER eventVerified Yes · 2026-09-28

Different units cannot be normalized without usage and provider assumptions.

Platform fee
Hermes
Starter $149; Business $399; Agency $699/month; Enterprise customVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
UnknownUnknown after research · 2026-09-28

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.

Included usage
Hermes
Starter 300; Business 1,000; Agency 1,650 minutesVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
1:1 voice WebRTC transport free on Pipecat Cloud; first 10,000 monthly Krisp minutes freeVerified Yes · 2026-09-28

Does not make hosting or model inference free.

Overage
Hermes
UnknownConflicting evidence · 2026-09-28

Official overage rates conflict, messaging pass-through varies and beta account terms need confirmation.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
Krisp beyond 10,000 active minutes/month: $0.0015/min; other components metered separatelyVerified Yes · 2026-09-28

This is the audio-filter allowance overage, not an all-in call rate.

Pass-through costs
Hermes
A2P messaging pass-through and customer billing configuration varyVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
LLM/STT/TTS provider invoices, transport, telephony, reserved runtime, recording and storageVerified Yes · 2026-09-28

Enterprise integrated inference billing by agreement.

Free offer
Hermes
UnknownUnknown after research · 2026-09-28

Official overage rates conflict, messaging pass-through varies and beta account terms need confirmation.

Private beta; Starter
Pipecat
UnknownNot researched

Not yet researched against this buyer-critical field standard.

Complete cost ceiling
Hermes
UnknownUnknown after research · 2026-09-28

Official overage rates conflict, messaging pass-through varies and beta account terms need confirmation.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
UnknownUnknown after research · 2026-09-28

No all-in ceiling from minutes alone: reservation, transport, providers, recording and carrier legs vary.

What remains unresolved
Hermes
Official overage rates conflict, messaging pass-through varies and beta account terms need confirmation.Verified Yes · 2026-09-28

Research conclusion about cost completeness, not a vendor capability.

Documented product/configuration only; see research notes · Private beta; Starter
Pipecat
UnknownUnknown after research · 2026-09-28

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.

Hermes

The service is advertised as a private beta with public launch pending.

Starter $149/month · V3.3 evidence review · Starter private beta subscription; unresolved overage scope

Excluded / confirm: Complete cost cannot be established from this reference. Official overage rates conflict, messaging pass-through varies and beta account terms need confirmation. · A2P messaging pass-through and customer billing configuration vary

monthly-bundleVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · Private beta; Starter
Read the complete profile →

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

component-stackVerified Yes · 2026-09-28

Framework open source; Cloud compute, reservation, transport, recording and providers separately priced.

Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Pricing model, Published numeric pricing, Twilio, 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.

Build a buyer-operated pilot →

Editorial index gate: noindex-cross-category. Different product layers. This pair is useful for architecture inspection, not a like-for-like purchase ranking.