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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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Hume AI vs ServiceAgent

Hume AI is positioned as hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. ServiceAgent is positioned as a home-service front-office produc

The decision in context

Hume AI is positioned as hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. 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.

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

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

TTS + EVI API sunset · Announced end: 13 Nov 2026, 05:01 UTC. Read notice & sources →

Compare for the job

Test opening hours, booking conflicts and an unanswered transfer.

2 of 4 slots
Hume 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 pointHume AIServiceAgent
Billing modelDifferent records
monthly-bundleVerified Yes · 2026-09-28
character-creditConditional · 2026-09-28
Billing unitDifferent records
Monthly subscription + EVI minutes / TTS characters / supplemental LLM usageVerified Yes · 2026-09-28
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 · 2026-09-28
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
Bring your modelDifferent records
YesVerified Yes · 2026-09-28
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
Warm transferDifferent records
UnknownUnknown after research · 2026-09-28
YesVendor claim · 2026-09-28Vendor-described receptionist; current waitlist
HIPAA pathDifferent records
YesVendor claim · 2026-09-28EVI API
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

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

Unknown ≠ No
Evidence, side by sideNo benchmark scores
Hume AIVoice Engines
ServiceAgentFull Platforms
Pricing model
Hume AI
monthly-bundleVerified Yes · 2026-09-28

Subscription includes TTS/EVI/Voice allowances; overage and managed external LLM usage add cost.

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
Hume AI
$3/month Starter; included EVI minutes and overage depend on planVerified Yes · 2026-09-28

Free plan exists; paid entry is not a complete phone-call bill.

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
Hume AI
Monthly subscription + EVI minutes / TTS characters / supplemental LLM usageVerified Yes · 2026-09-28

Incompatible product allowances are not collapsed into one all-in minute price.

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
Hume AI
$0 Free; $3 Starter; $14 Creator regular; $70 Pro; $200 Scale; $500 BusinessVerified Yes · 2026-09-28

First-month Creator promotion is separate from regular price; Enterprise custom.

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
Hume AI
Starter: 40 EVI minutes; TTS character allowance separateVerified Yes · 2026-09-28

Plan-scoped EVI allowance; does not include every third-party carrier/model charge.

Starter
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
Hume AI
Plan-specific usage rates after included allowancesVerified Yes · 2026-09-28

TTS characters, EVI minutes and supplemental model usage remain separate.

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
Hume AI
Hume-managed external LLM usage extra; BYO key/custom model paid outside Hume; Twilio separateVerified Yes · 2026-09-28

Hume not charging BYO LLM usage does not make the provider free.

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
Hume AI
UnknownNot researched

Not yet researched against this buyer-critical field standard.

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
Hume AI
UnknownUnknown after research · 2026-09-28

Selected external LLM, carrier, token/character consumption and overages prevent a complete cost ceiling from monthly minutes alone.

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
Hume AI
UnknownUnknown after research · 2026-09-28

Selected external LLM, carrier, token/character consumption and overages prevent a complete cost ceiling from monthly minutes alone.

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.

Hume AI

VoiceAgent.best recommends evaluating migration options rather than starting a new long-term TTS or EVI API deployment. This is our editorial judgment; replacement compatibility has not been established.

$3/month Starter; included EVI minutes and overage depend on plan · V3.3 evidence review · Starter subscription reference; EVI 40 minutes; external LLM/telephony extra

Excluded / confirm: Complete cost cannot be established from this reference. Selected external LLM, carrier, token/character consumption and overages prevent a complete cost ceiling from monthly minutes alone. · Hume-managed external LLM usage extra; BYO key/custom model paid outside Hume; Twilio separate

monthly-bundleVerified Yes · 2026-09-28

Subscription includes TTS/EVI/Voice allowances; overage and managed external LLM usage add cost.

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, 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.

Review Hume API sunset & migration guidance →

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