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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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Murf AI vs Retell AI

Murf AI is positioned as a speech-generation API alongside creative production tools; Falcon targets live conversational output. Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated

The decision in context

Murf AI is positioned as a speech-generation API alongside creative production tools; Falcon targets live conversational output. Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. Start by deciding who owns the missing layers, then inspect the documented differences below.

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

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

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Test opening hours, booking conflicts and an unanswered transfer.

2 of 4 slots
Murf AIRetell AI
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 pointMurf AIRetell AI
Billing modelDifferent records
character-creditVerified Yes · 2026-09-28
component-stackVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
Billing unitDifferent records
1,000 charactersVerified Yes · 2026-09-28
minuteVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
Bring your telephonyDifferent records
Not applicableNot applicable · 2026-09-28Murf API TTS component
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
Bring your modelDifferent records
Not applicableNot applicable · 2026-09-28Murf API TTS component
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
Warm transferDifferent records
Not applicableNot applicable · 2026-09-28Murf API TTS component
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
HIPAA pathDifferent records
UnknownUnknown after research · 2026-09-28Murf service, not AWS controls
YesVendor claim · 2026-09-28PHI processing through Retell, subject to signed BAA and deployment configuration · BAA self-signing; no extra agreement fee stated · No EU operation stated in this compliance document
Your requirements & next steps
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Ready-made / AI receptionist · Strict evidence mode

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Unknown ≠ No
Evidence, side by sideNo benchmark scores
Murf AIVoice Engines
Retell AIFull Platforms
Pricing model
Murf AI
character-creditVerified Yes · 2026-09-28

PAYG character-metered API; enterprise license/contract options remain separate.

Retell AI
component-stackVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Headline / base price
Murf AI
Gen2 $0.03 / 1,000 characters; Falcon $0.01 / 1,000 charactersVerified Yes · 2026-09-28

Help-page model label is Falcon. Falcon 2 exact contracted rate should be confirmed; not silently assumed identical.

Retell AI
Voice-agent configuration range $0.07–$0.31/minVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Billing unit
Murf AI
1,000 charactersVerified Yes · 2026-09-28

Characters are not converted to fabricated minutes.

Retell AI
minuteVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Platform fee
Murf AI
UnknownUnknown after research · 2026-09-28

Reviewed targeted documentation, API schemas and pricing/enterprise/partner passages. AWS CLI/IAM references do not establish a Murf CLI or product RBAC; workspace-scoped clones do not establish agency subaccounts; sample code licenses do not license model weights. Exact current product/plan detail remains unresolved.

Retell AI
PAYG $0; optional recurring number/concurrency/KB chargesVerified Yes · 2026-09-28

Zero platform fee is not zero total fixed cost.

Included usage
Murf AI
100000characters one-time free API allowanceVerified Yes · 2026-09-28

Paid plan character balances differ from free allowance; no calling minutes inferred.

Retell AI
20 concurrent call slots and first 10 knowledge bases; call usage billed separatelyVerified Yes · 2026-09-28

Paid extras$8/slot/month and$8/KB/month; usage separate.

Overage
Murf AI
PAYG Gen2 reference $0.03/1000characters;minimum$2Verified Yes · 2026-09-28

Model/endpoint-specific pricing; current Falcon2 and Enterprise contracts must be checked separately.

Retell AI
Metered usage; selected model, voice, carrier and add-ons determine rateVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Pass-through costs
Murf AI
Separate STT, LLM, application hosting and transport/carrier billsVerified Yes · 2026-09-28

Buyer pays external stack providers; not all costs are invoiced by Murf.

Retell AI
Telephony, selected LLM/TTS, add-ons and concurrency burst can add chargesVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Free offer
Murf AI
UnknownNot researched

Not yet researched against this buyer-critical field standard.

Retell AI
$10 free creditsVerified Yes · 2026-09-28

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

PAYG
Complete cost ceiling
Murf AI
UnknownUnknown after research · 2026-09-28

Character-metered TTS does not determine a complete phone-agent bill; external STT/LLM/carrier/runtime choices and text volume are unspecified.

Retell AI
UnknownUnknown after research · 2026-09-28

A headline configuration range is not a ceiling on telephony, model, add-on or burst charges.

Documented product/configuration only; see research notes · PAYG
What remains unresolved
Murf AI
UnknownUnknown after research · 2026-09-28

Character-metered TTS does not determine a complete phone-agent bill; external STT/LLM/carrier/runtime choices and text volume are unspecified.

Retell AI
A headline configuration range is not a ceiling on telephony, model, add-on or burst charges.Verified Yes · 2026-09-28

Research conclusion about cost completeness, not a vendor capability.

Documented product/configuration only; see research notes · PAYG

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.

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What to verify together.

Murf AI

Falcon and Gen 2 use different rates.

Gen2 $0.03 / 1,000 characters; Falcon $0.01 / 1,000 characters · V3.3 evidence review · Murf Gen2 PAYG TTS; Falcon family separately priced

Excluded / confirm: Complete cost cannot be established from this reference. Character-metered TTS does not determine a complete phone-agent bill; external STT/LLM/carrier/runtime choices and text volume are unspecified. · Separate STT, LLM, application hosting and transport/carrier bills

character-creditVerified Yes · 2026-09-28

PAYG character-metered API; enterprise license/contract options remain separate.

Read the complete profile →

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

component-stackVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · PAYG
Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Technical setup, Pricing model, Published numeric pricing, Zapier, Make, n8n, Analytics dashboard, 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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Editorial index gate: noindex-cross-category. Different product layers. This pair is useful for architecture inspection, not a like-for-like purchase ranking.