voiceagent.best
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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.

Vendor intelligence

Speechify

A developer TTS API under SpeechifyAI, distinct from the consumer reading subscription.

At a glance / documented capabilities

Read the signals. Keep the scope.

All evidence ↗

Voice

Conditional
Scope & source
YesConditional · 2026-09-28Simba 3.0 or eligible pinned legacy model
Source ↗

Telephony / SIP

Unknown after research
Scope & source
UnknownUnknown after research · 2026-09-28Current captured product corpus; not a universal unsupported claim
Source ↗

Agent tools

Unknown after research
Scope & source
UnknownUnknown after research · 2026-09-28Current captured product corpus; not a universal unsupported claim
Source ↗

Integrations / webhooks

Conditional
Scope & source
YesConditional · 2026-09-28Unknown
Source ↗

Enterprise / HIPAA path

Unknown after research
Scope & source
UnknownUnknown after research · 2026-09-28
Source ↗
Voice Engines

A place in your stack.

Best for

  • Product teams adding read-aloud or narration
  • Developers budgeting speech by characters with explicit included balances

Watch-outs

  • Consumer and API plans are different products.
  • Simba 3.2 is English-only; multilingual needs require a compatible model and voice.
  • Self-serve API plans do not price enterprise voice agents.
Visit SpeechifyOfficial site · no affiliate tracking
Product evidence coverage

Documented claims, not tested performance.

5 / 23 fields

Product specification

What the evidence says.

Unknown means we have not established it. It does not mean No. Compliance claims require plan and contract review.

White label

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Client tenancy

UnknownUnknown after research

Project budget isolation and reader affiliate domain restrictions do not establish branded agency workspaces.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Client billing

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

ISO 27001

Unknown

Not established by the evidence reviewed. This does not mean unsupported.

No verified source

BAA availability

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

SIP

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Warm transfer

UnknownNot applicable

Selected self-serve product is a TTS stage. These phone, input-recognition, conversational-orchestration and call-recording functions belong to the surrounding stack; enterprise Voice Agents need a separate contract and are not assumed.

Source ↗ (opens in new tab)

Cold transfer

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Batch calling

Unknown

Not established by the evidence reviewed. This does not mean unsupported.

No verified source

MCP tools

UnknownUnknown after research

Docs MCP and Claude coding tools provide developer documentation search, not runtime voice-agent MCP or Anthropic model hosting.

Source ↗ (opens in new tab)

Webhooks

DocumentedConditional

Per-key, project and workspace spend alerts at80/100%; billed-usage lag permits brief overshoot.

Source ↗ (opens in new tab)

Calendar

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

CRM

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Bring your carrier

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Bring your model

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Bring your voice

UnknownNot applicable

Speechify is the chosen TTS component; selecting another TTS provider occurs in the buyer-owned orchestrator.

Source ↗ (opens in new tab)

HIPAA / BAA

UnknownUnknown after research

Trust page Type II statement does not establish Type I, HIPAA covered-service agreement or customer audit-log controls.

Source ↗ (opens in new tab)

SOC 2

DocumentedVendor claim

Trust page supplier statement only; independent report not inspected.

Source ↗ (opens in new tab)

GDPR

UnknownUnknown after research

No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.

Source ↗ (opens in new tab)Source ↗ (opens in new tab)

Languages

DocumentedConditional

Mixed-language synthesis and model/language selection; selected model must support languages.

Source ↗ (opens in new tab)

Voices

Unknown

Not established by the evidence reviewed. This does not mean unsupported.

No verified source

Realtime audio

Streaming TTS

Source ↗ (opens in new tab)

Voice cloning

Paid API plans

Free plan does not include voice cloning.

Source ↗ (opens in new tab)

Architecture & connections

Understand the moving parts.

STT

Provider options not established by current research

LLM

Runtime provider options not established by current research

TTS

Speechify Simba 3.2 · Speechify Simba 3.0

TELEPHONY

Unknown — provider details not established by reviewed evidence.

Integrations

Unknown — provider details not established by reviewed evidence.

SpeechifyAI API pricing (opens in new tab)SpeechifyAI TTS API (opens in new tab)Speechify affiliate program (opens in new tab)Speechify affiliate terms (opens in new tab)
Research outcomes / sources / limitations

Evidence you can inspect.

A documented feature, a supplier claim and an unanswered question are different kinds of evidence.

Buyer-relevant evidence88 / 88 applicable P0 fields researched

29 strong-source resolved · 49 unknown after research

Evidence coverage details
Strong-source resolved
29
Vendor-claim only
1
Conditional
9
Other sourced outcomes
0
Unknown after research
49
Conflicting evidence
0
Not applicable
26
Not researched
0

P1: 129 / 129 researched · Relevant P2: 26 / 26 researched.

Checked 2026-09-28. P0 means buyer-critical. Research coverage measures the work completed, not product quality, trust, or a benchmark score. A researched field can still be Unknown.

Inspect detailed evidence, sources and research gaps

September 2026 remains the historical baseline. A new research date does not mean a feature launched that day. Unknown after research and not researched are separate states.

Official documentation establishes what the supplier documents. No paid calls, independent product benchmarks or compliance audits were performed in this research pass. Coverage measures research work, never product quality.

Buyer intelligence / September 2026 baseline

The operating decision.

Price structure

Characters / credits

V3.3 evidence review · Starter TTS API plan; credit/character schedule unresolved; Enterprise Agents separate quote

character-creditVerified Yes · 2026-09-28

Paid monthly subscription includes USD usage balance consumed by character-priced synthesis. Agent quote separate.

pricing ↗

Human fallback

Unknown — no established fallback mode

UnknownUnknown after research · 2026-09-28

No individually verified capability establishes this selection. Conditional support and vendor claims do not satisfy Strict Must-have.

integrations ↗pricing ↗text to speech api ↗

Documented transfer is not a staffed human service. Verify who answers, when they answer and what happens if they do not.

Try it yourself

Unknown — no independently checked public demo entry is attached.

External signals

No dated external signal in this record. Missing evidence is not a negative review.

Underlying model context: the documented stack above does not establish an exact benchmark checkpoint or its deployed settings. Public model results cannot become a Speechify score.

Plan a Speechify pilotSee something outdated? Report a correction.Public model evidence →

Append-only price history

Every capture leaves a trace.

A new check creates a new snapshot. Deltas appear only for the same currency, unit, model and scope.

Checked datePrevious → currentDeltaEvidence
No earlier captureStarter $10/month

Tracked: $10 / month · SpeechifyAI Starter TTS API

First captureSpeechifyAI API pricing (opens in new tab)
Starter $10/monthFree $0; Starter $10; Pro $99; Scale $499 per month

Tracked: $10 / month · V3.3 evidence review · Starter TTS API plan; credit/character schedule unresolved; Enterprise Agents separate quote

Evidence improvedpricing (opens in new tab)
Free $0; Starter $10; Pro $99; Scale $499 per monthFree $0; Starter $10; Pro $99; Scale $499 per month

Tracked: $10 / month · V3.3 evidence review · Starter TTS API plan; credit/character schedule unresolved; Enterprise Agents separate quote

Evidence improvedpricing (opens in new tab)text to speech api (opens in new tab)
Free $0; Starter $10; Pro $99; Scale $499 per monthFree $0; Starter $10; Pro $99; Scale $499 per month

Tracked: $10 / month · V3.3 evidence review · Starter TTS API plan; credit/character schedule unresolved; Enterprise Agents separate quote

Evidence improvedpricing (opens in new tab)text to speech api (opens in new tab)pipecat (opens in new tab)api limits (opens in new tab)

New research observations preserve earlier captures. “Evidence improved” records what we learned; it does not claim the market changed on that date. September 2026 is the historical baseline.

Cost estimator

Price the actual workflow.

Complete cost cannot be established from this reference. Self-serve TTS balance does not determine telephony, recognition, LLM and hosting spend; enterprise agent quote unknown. · External STT, LLM, orchestrator, carrier and hosting

Carry the current source into your estimate, then enter the model, voice, carrier and fixed fees your configuration needs.

Estimate Speechify costs

Alternatives by category

Other voice engines to inspect.

Alphabetical alternatives within the same category. An editorial starting point, not a performance ranking.

CartesiaVoice Engines

Developers choosing a streaming TTS layer

Compare
ElevenLabsVoice Engines

Teams wanting speech and agent tooling from one vendor

Compare
Fish AudioVoice Engines

Developers prototyping expressive speech

Compare

Evidence archive

Inspect the record.

SpeechifyAI API pricingreviewed

Current API plans: Free 500K characters/month; Starter $10/month with 1.9M characters and $10/1M additional; Pro $99 with $8/1M additional; Scale $499 with $6/1M additional. Monthly included balance expires; purchased top-ups do not. Voice agents are enterprise-only quoted deployments, separate from self-serve TTS.

v2-voice-speechify-price · official · Captured 2026-09-27T02:53:32Z

Inspect official source ↗
SpeechifyAI TTS APIreviewed

Simba 3.2 supports English; Simba 3.0 supports six languages across seven locales. Both offer streaming; voice cloning requires a paid plan. Catalog voice compatibility varies by model and language. Vendor claims SOC 2 Type II availability; latency claims are not VoiceBench results.

v2-voice-speechify-product · official · Captured 2026-09-27T02:53:32Z

Inspect official source ↗
Speechify affiliate programunresolved

Speechify has a public affiliate program centered on reading and Studio products. The page advertises 30% but disagrees internally on attribution (30-day headline versus 60-day FAQ). API/enterprise-agent eligibility is not established.

v2-voice-speechify-affiliate · conflicted · Captured 2026-09-27T02:53:32Z

Inspect official source ↗
Speechify affiliate termsunresolved

Published terms distinguish consumer and business offers and include a 90-day consumer qualification condition plus trademark/keyword restrictions. These differ from the marketing page. Do not assume API coverage or a tracking window without the approved offer.

v2-voice-speechify-terms · conflicted · Captured 2026-09-27T02:53:32Z

Inspect official source ↗

Evidence describes documented scope, not a tested platform score. Unknown means a conclusion has not been established; API connectivity does not establish a native integration. Read our research methodology →

Commercial transparency

Public program exists. API eligibility, attribution and trademark restrictions need confirmation; no approved link on file.

Partner eligibility and commercial terms are Unknown in this review.

Visit SpeechifyOfficial site · no affiliate tracking