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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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Retell AI vs ServiceAgent

Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. ServiceAgent is positioned as a home-service front-office product combining call handling with business administ

The decision in context

Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. ServiceAgent is positioned as a home-service front-office product combining call handling with business administration. Start by deciding who owns the missing layers, then inspect the documented differences below.

8 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
Retell AIServiceAgent
Decision signals / differences first

Start where the records differ.

6 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 pointRetell AIServiceAgent
Billing modelDifferent records
component-stackVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
character-creditConditional · 2026-09-28
Billing unitDifferent records
minuteVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
Action credits;15credits/AI voice minute,2/SMS segment,5/ad creative,1/review replyVerified Yes · 2026-09-28
Bring your telephonyDifferent records
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
Bring your modelDifferent records
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
Warm transferDifferent records
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
YesVendor claim · 2026-09-28Vendor-described receptionist; current waitlist
HIPAA pathDifferent records
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
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
Your requirements & next steps
Carried from your shortlist

Your requirements

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Ready-made / AI receptionist · Strict evidence mode

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Unknown ≠ No
Evidence, side by sideNo benchmark scores
Retell AIFull Platforms
ServiceAgentFull Platforms
Pricing model
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
ServiceAgent
character-creditConditional · 2026-09-28

Monthly bundle plus action/telecom credits;15credits/AI voice minute. Not a single all-in minute price.

Headline / base price
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
ServiceAgent
Launch $0; paid Core $49/month or $39/month billed yearlyVerified Yes · 2026-09-28

Growth119monthly/95annual-equivalent;Franchise349/279. Display separates monthly and annual commitment.

Billing unit
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
ServiceAgent
Action credits;15credits/AI voice minute,2/SMS segment,5/ad creative,1/review replyVerified Yes · 2026-09-28

Top-up credit price is$0.02–$0.04; platform fees, included credits and other actions must be modeled separately.

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

Zero platform fee is not zero total fixed cost.

ServiceAgent
0/49/119/349 USD monthly (Launch/Core/Growth/Franchise)Verified Yes · 2026-09-28

Annual equivalents39/95/279requireyearlybilling;location/ad/paymentfees separate.

Included usage
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.

ServiceAgent
0/2000/6000/20000action credits per monthVerified Yes · 2026-09-28

Different activities draw from credits; do not convert the entire allowance to guaranteed calling minutes.

Overage
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
ServiceAgent
$0.02–$0.04 per separately purchased creditVerified Yes · 2026-09-28

AI voice15credits/minute; top-up package and selected plan determine cost.

Pass-through costs
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
ServiceAgent
SMS, campaigns and payment/other service fees varyVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Core published offer; account availability requires confirmation
Free offer
Retell AI
$10 free creditsVerified Yes · 2026-09-28

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

PAYG
ServiceAgent
Launch platform plan $0; no included credits; current waitlistVerified Yes · 2026-09-28

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

Core published offer; account availability requires confirmation
Complete cost ceiling
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
ServiceAgent
UnknownUnknown after research · 2026-09-28

Variable credit purchase tiers, nonvoice consumption, fees and current waitlist prevent a guaranteed all-in voice rate.

Documented product/configuration only; see research notes · Core published offer; account availability requires confirmation
What remains unresolved
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
ServiceAgent
Variable credit purchase tiers, nonvoice consumption, fees and current waitlist prevent a guaranteed all-in voice rate.Verified Yes · 2026-09-28

Research conclusion about cost completeness, not a vendor capability.

Documented product/configuration only; see research notes · Core published offer; account availability requires confirmation

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.

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 →

ServiceAgent

The public site still carries a launch-soon banner; confirm availability before migrating calls.

Launch $0; paid Core $49/month or $39/month billed yearly · V3.3 evidence review · Core monthly subscription and action-credit allowance; current waitlist, not general availability

Excluded / confirm: Complete cost cannot be established from this reference. Variable credit purchase tiers, nonvoice consumption, fees and current waitlist prevent a guaranteed all-in voice rate. · SMS, campaigns and payment/other service fees vary

character-creditConditional · 2026-09-28

Monthly bundle plus action/telecom credits;15credits/AI voice minute. Not a single all-in minute price.

Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Technical setup, Published numeric pricing, Call summary, Zapier, Webhooks, 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-low-intent. Browseable utility pair. Independent demand evidence and unique editorial review have not passed the index gate.