Morak
Browse platforms
Voice platformVoice Agent Platform

AssemblyAI

Voice AI infrastructure and managed Voice Agent API for production real-time voice agents.

Visit website Compare alternatives
Pricing at a glance
$4.50/hour ($0.075/min)
Starting price
From $4.50/hr
Setup
Developer build
Pricing model
Per Minute
Try it
Public web demo
Try the speech playground

Examine transcription, speaker detection and summaries on real audio without signing up.

A booking workflow still needs business-system actions and telephony integration.

At a glance

Calls & telephony

  • DetailCalls

    Inbound & outbound

  • Not supportedHuman handoff

    No

  • SupportedPhone numbers included

    Yes

  • SupportedBring your own carrier

    Yes

  • SupportedSIP trunking

    Yes

    Twilio SIP; bring your own number or use an AssemblyAI-owned one

Trust & access

  • SupportedHIPAA

    BAA available

    BAA signable without sales call, no premium pricing

  • SupportedSOC 2

    Type II

  • SupportedGDPR

    Yes

    GDPR included at no premium; EU endpoints

  • DetailLanguages

    Understands 18; speaks 6

  • SupportedFree to start

    Free credits

    $50 free credits, no card

  • SupportedDeveloper API

    Yes

Morak scorecard

How we score →
  • Ease of setupDeveloper build

    Expect developers to build call logic, integrations and deployment.

  • Pricing transparencyRates published

    Per-minute rates are public, so you can estimate cost at your volume.

  • Try before you buySelf-serve trial

    Sign up and test it yourself before paying.

  • Call & telephony controlBroad

    Documented: inbound, outbound, phone numbers, bring-your-own carrier and SIP.

  • Compliance readinessStrong

    Published: SOC 2 Type II, GDPR and HIPAA BAA.

  • Integration coverage2 of 4 covered

    Connects to phone system and automation or API. Not listed: customer records (CRM, EHR or POS) and calendar.

Typical score among voice agent platforms

Start with speech infrastructure, then build the workflow

What you get

Build real-time voice interaction on a managed speech layer instead of assembling each speech component yourself.

What to account for

A booking agent still needs your business actions, telephony connections and fallback paths. Testing speech capabilities does not establish a working booking integration.

Best for

  • Developer teams
  • Real-time voice agents
  • Streaming speech accuracy

Not a fit for

  • Non-technical teams wanting no-code phone setup
  • Buyers needing a fully packaged receptionist
  • Teams that want telephony, CRM, and campaign tooling bundled together

What the platform provides

Speech capabilities
Streaming speech-to-text, speech understanding, transcripts and a managed Voice Agent API.
Conversation controls
Turn detection, interruption handling, guardrails and tool calls, with WebSocket-based integration.

Connections & compatibility

Telephony

  • Twilio

AI models & voice

  • LLM Gateway
  • Guardrails

Automation & APIs

  • WebSocket API
  • Custom API
  • Tool calling

Data access & permissions

What an agent built on AssemblyAI can touch once deployed. These are the first questions a security review will ask.

  • Reads customer dataYes
  • Writes to your systemsYes
  • Sends messagesNo
  • Triggers workflowsYes
  • Records callsYes
  • Needs API keysYes
  • Human approval stepYes

Review audio and transcript retention, API key handling, temporary browser tokens, tool-call permissions, guardrails, and data residency needs before production use.

Cost at your volume

From $4.50/hrPer Minute

AssemblyAI lists Voice Agent API pay-as-you-go pricing at $4.50/hour ($0.075/min), covering the speech-to-speech voice agent pipeline. The pricing page also lists $50 in free credits and custom rate limits/concurrency through contact-sales packaging. Verify with vendor.

Before committing

Interrupt the agent during a tool call. Check turn detection, action timing and the fallback when a connected system does not respond.

How it compares

Side by side with two alternatives buyers weigh against it, on the same facts and scorecard.

AssemblyAI compared with Vapi and Synthflow
Detail
AssemblyAI
This product

Voice AI infrastructure and managed Voice Agent API for production real-time voice agents.

Vapi
A different approach

Developer-oriented voice agent platform for building phone agents with custom workflows and integrations.

Why compare: Investigate Vapi if your next step is custom phone-call orchestration rather than evaluating speech alone.

Synthflow
A different approach

No-code AI voice agent platform for business call automation, now sold through enterprise contracts.

Why compare: Consider Synthflow if your team needs a no-code phone-workflow builder rather than owning the API implementation.

Starting priceFrom $4.50/hrFrom $0.05/minFrom $30,000/yr
Free to startFree creditsFree creditsNot published
CallsInbound & outboundInbound & outboundInbound & outbound
HIPAABAA availablePaid add-onEnterprise plans
Morak scorecard How we score
Ease of setup
2 of 5, Developer build
2 of 5, Developer build
5 of 5, No-code setup
Pricing transparency
5 of 5, Rates published
5 of 5, Rates published
4 of 5, Starting price
Try before you buy
4 of 5, Self-serve trial
4 of 5, Self-serve trial
5 of 5, Call it now
Call & telephony control
4 of 5, Broad
5 of 5, Full control
5 of 5, Full control
Compliance readiness
5 of 5, Strong
4 of 5, Good
5 of 5, Strong
Integration coverage
3 of 5, 2 of 4 covered
5 of 5, All covered
4 of 5, 3 of 4 covered
Head-to-head View profile
Head-to-head View profile
Compare all 3 in detailPricing, capabilities, integrations and limits on one page.
Browse platforms →Not sure where to start? Find your match →