Cartesia
by Cartesia
At a glance
Real-time voice generation platform built on state-space models for low-latency speech synthesis.
text-to-speech real-time voice
- Licence
- Not recorded
- Category
- Audio, Voice & Music
- Business model
- Freemium
- Availability
- Global
- Launched
- 2024-05
Overview
Cartesia is a real-time voice generation platform built on state-space models for very low-latency speech synthesis. Its Sonic models target conversational voice agents that need fast, natural responses. Access is through a developer API with usage-based pricing and free credits.
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Key features
- Sonic text-to-speech and Ink streaming speech-to-text models
- State-space model research for low-latency inference
- Managed Agents platform for enterprise voice agents
- One API across cloud, on-premises, and on-device deployment
Use cases
- Real-time voice agents and assistants
- Interactive voice applications
- Low-latency narration and dubbing
Pricing
Access is via a usage-based developer API with free starter credits and paid tiers for scale.
Record details
Provenance, dates and links are kept here so the main sections stay about the product itself.
Links, dates and provenance
- Record updated
- 2026-10-09
- Pricing
- www.cartesia.ai ↗
- Documentation
- docs.cartesia.ai ↗
- Founded
- 2023
- Headquarters
- US
- Canonical URL
- https://globalaiproductindex.com/products/cartesia/
Selection profile
Every field says where its value comes from. "Unknown" means we have not confirmed it — it does not mean the product lacks the feature.
Selection profile11 fields3 unknown
- Tasks it fits
- Audio and voice
Derived from the record: category "audio-voice".
Suggest a correction - How you use it
- Web app
Hosted product with no desktop/CLI tag in the record; assumed web-delivered.
Suggest a correction - Runs on
- Web
Derived from platform words in the record description/features/tags.
Suggest a correction - Where it runs
- Vendor cloud
Vendor-hosted product; no self-hosted option is recorded.
Suggest a correction - Works offline
- Not recorded
The record contains no offline-operation claim.
Suggest a correction - Official service region
- Global
Mirrors the availability field already on the record ("global").
Suggest a correction - Public API
- Yes
Matched on the vendor page: “or JavaScript. Playground Try every model in the browser and grab an API key. API reference API conventions, errors, and the reference for every REST and WebSocket endpo”
Suggest a correction - Licence
- proprietary
Commercial product; no source licence is published in the record.
Suggest a correction - Commercial use
- Not recorded
Commercial product; the terms reviewed here do not state a non-commercial restriction, but that was not verified.
Suggest a correction - Interface languages
- Not recorded
No vendor page read in this pass states the product's own interface languages; the key exists so the field can be answered later rather than left absent.
Suggest a correction - Billing
- Subscription Free allowance: Limited Subscription required: No
Prices are the vendor’s advertised entry price and exclude taxes; always confirm on the vendor’s own page.
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Where each value comes from
- Tasks it fits
- Our inference
- How you use it
- Our inference
- Runs on
- Our inference
- Where it runs
- Our inference
- Works offline
- Our inference
- Official service region
- Our inference
- Public API
- Verified 2026-10-09 docs.cartesia.ai ↗
- Licence
- Our inference
- Commercial use
- Our inference
- Interface languages
- Unknown
Key facts and their evidence
Each fact lists the conditions it holds under, the page it was read from and the day it was checked.
-
API: Public API documented Verified 2026-10-09 docs.cartesia.ai ↗
Applies to: As stated on docs.cartesia.ai on 2026-10-09
Matched on the vendor page: “or JavaScript. Playground Try every model in the browser and grab an API key. API reference API conventions, errors, and the reference for every REST and WebSocket endpo”
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Frequently asked questions
What is Cartesia known for?
Cartesia is known for very low-latency speech synthesis built on state-space models, aimed at real-time voice agents.
How do developers use Cartesia?
Developers access Cartesia's Sonic voice models through a streaming API.
Is Cartesia free?
Cartesia offers free starter credits; production usage is priced by usage.
What are Cartesia's main limitations?
Cartesia's licence terms, supported language coverage and region availability are not established in this record, so teams needing those guarantees should confirm them with the vendor first.
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- Deepdub — AI voice platform for dubbing, localization, text-to-speech, and voice conversion, supporting 100+ languages.
- Respeecher — Speech AI platform offering speech-to-speech conversion, voice cloning, a real-time text-to-speech API, a Pro Tools plugin, and a marketplace of licensed voice talents.
- Resemble AI — Voice cloning and speech synthesis platform with real-time voice generation and deepfake detection.
- Sesame — Conversational voice AI from the Oculus co-founder's startup, known for its lifelike Maya voice companion demo.
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This record was last reviewed on 2026-10-09.
Machine-readable record: /api/products/cartesia.json · Spot an error? Suggest a correction