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Cartesia

Real-time text-to-speech, speech-to-text and managed voice agents through a usage-based API.

Free accessFree plan20000 credits per month, plus 1 USD of agent credit, which covers about 27 minutes with Sonic or about 1 hour 51 minutes with Ink. Concurrency limits are 2 for text-to-speech (TTS) and 8 each for speech-to-text (STT) and agents.
Paid fromPro100000 credits/month, 5 USD agent credit; Sonic ~133 min, Ink ~9h16; TTS 3, STT/agents 12/12 concurrent

At a Glance

Cartesia is an AI tool for Voice & speech (category: Audio & Voice). Free access: Free plan. Paid from 5 USD per month (Pro). Documented: 5 plans with prices and limits.

Category
Voice & speech
Paid from
5 USD / month (Pro)
Free Option
Free plan
Plans
5
Sources
4 verified sources
Website
cartesia.ai (opens in a new tab)

Category: Audio & Voice · Voice & speech

Features

Cartesia combines speech synthesis, transcription and voice agents. Monthly plans include credits and agent credit, but telephony and call minutes are billed separately. Documented minutes are model estimates, not a blanket output promise. Inputs and outputs may serve model training by terms; a future opt-out and Enterprise ZDR are narrower.

Prices and plans

TierPricePeriodWhat you get
Freefreefree20000 credits/month, 1 USD agent credit; Sonic ~27 min, Ink ~1h51; TTS 2, STT/agents 8/8 concurrent
Pro5 USDmonth100000 credits/month, 5 USD agent credit; Sonic ~133 min, Ink ~9h16; TTS 3, STT/agents 12/12 concurrent
Startup49 USDmonth1.25M credits/month, 49 USD agent credit; Sonic ~1667 min, Ink ~115h44; TTS 5, STT/agents 20/20 concurrent
Scale299 USDmonth8M credits/month, 299 USD agent credit; Sonic ~10667 min, Ink ~740h44; TTS 15, STT/agents 60/60 concurrent
Enterprisecontact salescustomCustom credits, agent usage and concurrency; DPA/BAA, SSO, ZDR for TTS/STT by agreement

Prices per vendor, excl. taxes/VAT where applicable.

Price history and plan updates

  • : [Pro] Expanded Sonic TTS model on $5/mo Pro plan with 100,000 credits (~133 min audio) and ultra-low latency.

Limits

Free/Pro/Startup/Scale include 20,000/100,000/1.25M/8M credits and 1/5/49/299 USD agent credit monthly. Sonic-3.6 includes about 27/133/1,667/10,667 minutes, Ink-2 about 1h51/9h16/115h44/740h44. TTS concurrency is 2/3/5/15, STT 8/12/20/60, agent calls 8/12/20/60. Instant/professional voice cloning and organizations depend on plan. Terms allow inputs, outputs and interactions for model training unless otherwise agreed; opt-out covers selected categories only prospectively. Zero Data Retention is Enterprise TTS/STT only. Outputs can be similar; commercial use depends on tier.

Alternatives and similar tools to Cartesia

A selection for “Voice & speech” and curated direct comparisons. Direct comparisons carry the most weight, followed by the shared subcategory and shared tasks. Matching free-access types carry less weight. Ties are resolved consistently. No quality rating.

ElevenLabsGenerate speech, voiceovers, dubbing, and voice agents with synthetic voices.StarterWispr FlowSystem-wide AI dictation app that turns spoken speech into polished, ready-to-use text in any application on Mac, Windows, iOS, and Android.ProSmallest.aiVoice AI platform offering low-latency (sub-100ms) text-to-speech, speech-to-text, and voice agents for enterprises.Enterprise
V
VoiskeyAI dictation that turns rough speech into ready-to-send text. macOS, Windows, iOS, Android. Not Wispr alone.Monthly PremiumVapiDeveloper platform for building and deploying voice AI agents (phone call bots) that handle customer calls, support, and appointment scheduling.ScaleSuperwhisperAI-powered dictation for macOS, Windows and iOS, works offline with local Whisper models and optionally with cloud/bring-your-own AI models.ProFineVoiceCreate AI narration, cloned voices and sound effects in one audio platform.Basic · monthlyFish AudioAI text-to-speech and voice-cloning platform (plus speech-to-text and voice changer) positioned as a cheaper alternative to ElevenLabs.Plus

Cartesia alternatives comparison →

More tools for the same task, alphabetical and sourced. Not a quality ranking.

Voice and voiceover

Two tools at a glance: prices, limits and sources from the catalog. Side by side, not a ranking.

ElevenLabs vs Cartesia

FAQ

Is Cartesia available for free?

Yes. A permanently free plan is published, not a time-limited trial. 20000 credits per month, plus 1 USD of agent credit, which covers about 27 minutes with Sonic or about 1 hour 51 minutes with Ink. Concurrency limits are 2 for text-to-speech (TTS) and 8 each for speech-to-text (STT) and agents.

Where is the vendor of Cartesia based?

Cartesia AI, Inc. is based in the USA. Regardless of that location, data processing and privacy terms are governed by the vendor's own contract.

How is Cartesia billed?

All plans list unlimited workspace seats but different model credits, agent credit and concurrency. Agent calls cost 0.06 USD/minute from Free through Scale. Cartesia telephony adds 0.014 USD/minute. The advertised free LLM use for UI-created agents and evaluations is expressly limited in time. Enterprise is custom.

How much does Cartesia cost?

The cheapest paid plan of Cartesia is Pro at 5 USD per month. 5 plans are documented in total, each with its price and limits.

Is Cartesia currently available?

Cartesia is still active. speech-AI API with Free through Enterprise offers.

How we compare

We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.

Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.

Edited and checked by the AI Compare Ninja team

Sources

All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.

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