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Voice platformDeveloper API

Deepgram

Developer voice AI platform with a unified Voice Agent API for building real-time conversational agents.

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Starting price
From $4.50/hr
Setup
Developer build
Pricing model
Per Minute
Try it
Public web demo
Try the voice-agent playground

Explore real-time voice interaction in the browser.

Your business actions and telephony setup remain untested.

At a glance

Calls & telephony

  • DetailCalls

    Inbound & outbound

  • SupportedHuman handoff

    Yes

  • Not supportedPhone numbers included

    No

  • SupportedBring your own carrier

    Yes

  • Not publishedSIP trunking

    Not published

Trust & access

  • With conditionsHIPAA

    Enterprise plans

    BAAs for Enterprise customers; contact sales

  • SupportedSOC 2

    Type II

    Type 1 and Type 2

  • SupportedGDPR

    Yes

    Fully compliant; EU endpoint

  • DetailLanguages

    10 conversational languages

  • SupportedFree to start

    Free credits

    $200 free credit

  • 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 controlModerate

    Documented: inbound, outbound, human handoff and bring-your-own carrier.

  • Compliance readinessStrong

    Published: SOC 2 Type II, GDPR and HIPAA on enterprise plans.

  • 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 developer APIs

Use a unified voice API inside your application

What you get

Bring speech capabilities together for a real-time conversational agent.

What to account for

Business integrations, telephony and fallback behavior remain implementation work for your team.

Best for

  • Developer teams
  • Real-time voice agents
  • Enterprise voice infrastructure
  • Teams wanting a unified voice stack

Not a fit for

  • Non-technical buyers wanting a turnkey receptionist
  • Teams needing built-in CRM workflows without engineering
  • Businesses that only need human answering

What the platform provides

Speech stack
Speech-to-text, text-to-speech and audio intelligence, plus a Voice Agent API combining speech with LLM orchestration.
Conversation controls
Turn-taking, interruption handling and function calling in a real-time stack. Business integrations still need implementation.

Connections & compatibility

Telephony

  • Twilio

AI models & voice

  • BYO LLM
  • BYO TTS

Automation & APIs

  • WebSocket API
  • Custom API
  • Function calling

Data access & permissions

What an agent built on Deepgram 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, tool-call permissions, deployment mode, HIPAA/GDPR needs, regional data residency, and any self-hosted or VPC requirements.

Cost at your volume

From $4.50/hrPer Minute

Deepgram lists Voice Agent API pricing at $4.50/hour ($0.075/min) when using Deepgram's full stack, with built-in rate reductions when bringing your own models. Deepgram also offers managed, dedicated single-tenant, VPC, and self-hosted deployment options. Verify with vendor.

Before committing

Interrupt a response and fail a function call. Check endpointing and recovery using real call audio.

How it compares

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

Deepgram compared with Synthflow and AssemblyAI
Detail
Deepgram
This product

Developer voice AI platform with a unified Voice Agent API for building real-time conversational agents.

Synthflow
A different approach

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

Why compare: Consider Synthflow if the real requirement is a configured business phone agent with less engineering work.

AssemblyAI
Similar product

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

Starting priceFrom $4.50/hrFrom $30,000/yrFrom $4.50/hr
Free to startFree creditsNot publishedFree credits
CallsInbound & outboundInbound & outboundInbound & outbound
HIPAAEnterprise plansEnterprise plansBAA available
Morak scorecard How we score
Ease of setup
2 of 5, Developer build
5 of 5, No-code setup
2 of 5, Developer build
Pricing transparency
5 of 5, Rates published
4 of 5, Starting price
5 of 5, Rates published
Try before you buy
4 of 5, Self-serve trial
5 of 5, Call it now
4 of 5, Self-serve trial
Call & telephony control
3 of 5, Moderate
5 of 5, Full control
4 of 5, Broad
Compliance readiness
5 of 5, Strong
5 of 5, Strong
5 of 5, Strong
Integration coverage
3 of 5, 2 of 4 covered
4 of 5, 3 of 4 covered
3 of 5, 2 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.
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