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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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CloudTalk vs OpenAI Realtime API

CloudTalk is positioned as aI reception and specialist workflows connected to a business phone system. OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. Start by dec

The decision in context

CloudTalk is positioned as aI reception and specialist workflows connected to a business phone system. OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. 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.

7 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
CloudTalkOpenAI Realtime API
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 pointCloudTalkOpenAI Realtime API
Billing modelDifferent records
monthly-bundleVerified Yes · 2026-09-28Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
component-stackVerified Yes · 2026-09-28
Billing unitDifferent records
customVerified Yes · 2026-09-28Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
1 million text/audio/image tokens; transcription separately meteredVerified Yes · 2026-09-28
Bring your telephonyDifferent records
UnknownUnknown after research · 2026-09-28Documented product/configuration only; see research notes
YesConditional · 2026-09-28Realtime SIP inbound
Warm transferDifferent records
YesConditional · 2026-09-28CloudTalk agent/group targets
UnknownUnknown after research · 2026-09-28
HIPAA pathDifferent records
YesVendor claim · 2026-09-28General CloudTalk security claim; VoiceAgent/provider eligibility needs contract review
UnknownUnknown after research · 2026-09-28
WebhooksDifferent records
UnknownUnknown after research · 2026-09-28UnknownDocumented product/configuration only; see research notes
YesConditional · 2026-09-28Unknown
Your requirements & next steps
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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
CloudTalkFull Platforms
OpenAI Realtime APIDeveloper Frameworks
Pricing model
CloudTalk
monthly-bundleVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
component-stackVerified Yes · 2026-09-28

Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.

Headline / base price
CloudTalk
UnknownConflicting evidence · 2026-09-28

Same captured pricing page mixes currencies, recurring prices and introductory allowances without a clear scoped reconciliation.

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
GPT-Realtime-2 audio input $32/M, audio output $64/M; text input $4/M, output $24/MVerified Yes · 2026-09-28

Cached audio/text and image inputs have separate rates. Rate is not per-minute.

Billing unit
CloudTalk
customVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
1 million text/audio/image tokens; transcription separately meteredVerified Yes · 2026-09-28

Model scope fixed to GPT-Realtime-2, not all voice models.

Platform fee
CloudTalk
Page header/FAQ says $99/mo; visible EUR table says €0/mo; Specialist €349/moVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Included usage
CloudTalk
Header/FAQ: 200 minutes; EUR Receptionist table: 50 first-month minutes; Specialist 1,000Verified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Overage
CloudTalk
Custom from €0.15/min; complete plan/destination schedule not establishedVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Pass-through costs
CloudTalk
UnknownUnknown after research · 2026-09-28

Same captured pricing page mixes currencies, recurring prices and introductory allowances without a clear scoped reconciliation.

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
Input transcription, tool/backend calls, carrier and application infrastructureVerified Yes · 2026-09-28

Repeated context, cache behavior and turn count affect token charges.

Free offer
CloudTalk
50 initial minutes / 14-day trial advertised; confirm selected offerVerified Yes · 2026-09-28

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

Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownNot researched

Not yet researched against this buyer-critical field standard.

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

Same captured pricing page mixes currencies, recurring prices and introductory allowances without a clear scoped reconciliation.

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.

What remains unresolved
CloudTalk
Same captured pricing page mixes currencies, recurring prices and introductory allowances without a clear scoped reconciliation.Verified Yes · 2026-09-28

Research conclusion about cost completeness, not a vendor capability.

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.

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.

CloudTalk

Get a written currency-specific quote: the current pricing page mixes plan and trial presentations.

Page header/FAQ says $99/mo; visible EUR table says €0/mo; Specialist €349/mo · V3.3 evidence review · Localized Receptionist/Specialist offer conflict; request a currency-specific quote

Excluded / confirm: Complete cost cannot be established from this reference. Same captured pricing page mixes currencies, recurring prices and introductory allowances without a clear scoped reconciliation. · Provider, carrier and custom contract terms require separate verification

monthly-bundleVerified Yes · 2026-09-28

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

Documented product/configuration only; see research notes · Localized Receptionist / Specialist offers conflict
Read the complete profile →

OpenAI Realtime API

A token rate cannot be compared directly with a bundled call-minute price.

GPT-Realtime-2 audio input $32/M, audio output $64/M; text input $4/M, output $24/M · V3.3 evidence review · GPT-Realtime-2 input audio tokens only; output/audio/text/cache have different rates; not 2.1 rate evidence

Excluded / confirm: Complete cost cannot be established from this reference. Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient. · Input transcription, tool/backend calls, carrier and application infrastructure

component-stackVerified Yes · 2026-09-28

Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.

Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Pricing model, OpenAI models, Function / tool calling, Interruption controls, 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.