Cartesia Voice Agent stack

by Cartesia

Don’t want to wire up the Cartesia Voice Agent stack API? Drop the file here.

The first 20 minutes of any recording are transcribed free: a recording up to 20 minutes transcribes in full, a longer one is previewed, and a pack from $6 (500 minutes) transcribes the rest and opens every export, and credits never expire.

Cartesia's Sonic TTS plus partner ASR/LLM for low-latency voice agents.

Cloud, API  ·  see vendor pricing

TL;DR

Best for developers prioritizing sub-100ms TTS first-byte latency in agents. Pricing: see vendor pricing.

Category
Transcription APIs
Pricing
see vendor pricing
Platforms
Cloud, API

What it is

Cartesia ships the Sonic family of state-space TTS models claimed to deliver sub-100ms first-audio latency. Combined with Deepgram or AssemblyAI ASR plus an LLM, Cartesia powers a popular low-latency voice-agent stack widely deployed in Pipecat, LiveKit Agents, and Vapi configurations.

Best for: Developers prioritizing sub-100ms TTS first-byte latency in agents.
Watch out for: TTS-led; needs paired ASR and LLM providers.

What people actually do with Cartesia Voice Agent stack-style transcription

The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.

Wire it into Amazon S3n8nMake.comGoogle DriveZapierSlack

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supportedNone
HIPAA eligibleNo

Cartesia Voice Agent stack vs Whipscribe

FeatureCartesia Voice Agent stackWhipscribe
CategoryTranscription APIsTranscription APIs
PricingNot verified$6–$24 one-time packs (credits never expire) · first 20 minutes free
Speaker identificationNot verifiedNamed in the summary, key quotes and chapters
Word timestampsNot verifiedYes
StreamingNot verifiedNo
Languages—99
PlatformsCloud, APIWeb, API, MCP

Alternatives to Cartesia Voice Agent stack

Frequently asked about Cartesia Voice Agent stack

How much does Cartesia Voice Agent stack cost?

Cartesia Voice Agent stack does not publish a self-serve price — it is quoted by the vendor on contact. Expect an enterprise-style agreement rather than a card-and-go signup.

Does Cartesia Voice Agent stack work on Mac, Windows and Linux?

Cartesia Voice Agent stack runs on Cloud and API. It is not listed for other platforms; check the vendor for anything beyond Cloud and API.

What are the limitations of Cartesia Voice Agent stack?

TTS-led; needs paired ASR and LLM providers.

Who is Cartesia Voice Agent stack best for?

Developers prioritizing sub-100ms TTS first-byte latency in agents.

Is Cartesia Voice Agent stack open source?

No. Cartesia Voice Agent stack is a proprietary API. If you need source you can read and run yourself, the open-source tools in this directory are the place to look.

Can I use Cartesia Voice Agent stack in the browser?

No — Cartesia Voice Agent stack is a Cloud and API application, not a web app. You install it rather than sign in to it.

What kind of tool is Cartesia Voice Agent stack?

In this directory Cartesia Voice Agent stack is filed under voice agent, voice middleware as a API.

What are the alternatives to Cartesia Voice Agent stack?

There is a side-by-side page at /tools/cartesia-voice-agent-alternatives comparing Cartesia Voice Agent stack with the closest tools in the same category on price, platform and features.

Can I automate Cartesia Voice Agent stack-style transcription without running it myself?

Yes. If what you want is transcripts rather than the tool itself, Whipscribe does the same job as a hosted API: submit a file or URL, poll a job id, pull the result as txt, json, srt, vtt or docx. $0.012 a minute — about $0.72 an audio hour — bought as credits that never expire. The automation recipes on this site show it wired to Drive folders, Zoom recordings, S3 buckets and no-code platforms.

How is Whipscribe different from Cartesia Voice Agent stack?

Cartesia Voice Agent stack is another vendor's product; Whipscribe is a per-minute transcription service. Recordings are transcribed on our own servers and never used for training, and every job returns five formats plus an AI summary, quotes and topics. The first 20 minutes of any recording are transcribed free, and a pack from $6 (500 minutes) transcribes the rest and opens every export.

What does transcription cost if I use Whipscribe instead of Cartesia Voice Agent stack?

$0.012 a minute — about $0.72 an audio hour — bought as credits that never expire. There is no subscription and no monthly minimum: a 3-hour recording is about $2.16, a thousand-hour archive is about $720 once. The first 20 minutes of any recording are transcribed free, and a pack from $6 (500 minutes) transcribes the rest and opens every export, so you can see what your recording holds before paying anything.

Where is the Cartesia Voice Agent stack category heading?

Three things are moving across the whole speech-to-text market right now: summaries, action items and speaker insights generated on top of the transcript rather than sold separately; private, secured deployment where the audio never leaves a boundary you control; and agent access — transcription exposed as a tool that Claude, Cursor or a workflow runner can call directly. Whipscribe ships all three today: per-job insights, our own servers, and an MCP server.

Whipscribe is a hosted transcription service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.

Transcribe your recordings

Explore

Have the recording already?

Skip the setup and send the file or the link: see how to transcribe an MP3 of any length, transcribing a podcast episode and the SRT generator.

Looking at paid options?

Before you choose a transcription tool or service: see an honest roundup of the best transcription services, affordable transcription priced per hour and transcription services from $6.