Cartesia
Fast streaming text-to-speech with a web playground and API. AI model and agent, with a free plan; runs on web. The stack builder picks it for voiceover.
What it is known for
- Strengths: Sonic text-to-speech and Ink speech-to-text; managed voice agents; on-premise and on-device deployment.
- For: finance, healthcare and government; customer support and fraud teams.
- Runs on: API on regional cloud endpoints, on-premise or on-device.
- Learning curve: easy: claims a voice agent reaches production in minutes.
- Works with: nothing named on its page.
Read on October 9, 2026 from cartesia.ai.
Plans and prices
| Plan | Price | What you get |
|---|---|---|
| Free | Free | 20,000 credits a month |
| Pro | $5/mo | |
| Startup | $49/mo | |
| Scale | $299/mo |
Checked by hand against cartesia.ai/pricing on October 9, 2026; confidence high. Prices are monthly in US dollars unless the row says otherwise; the builder counts the plan it starts on, Pro.
When the stack builder picks it
The builder reads each job's rules from the top and takes the first step whose conditions hold and whose plan fits the money left. Cartesia is named in these steps:
- Voiceover, step 3 of 3, otherwise: Pro ($5/mo); the step also names ElevenLabs, Murf AI, WellSaid, Speechify Studio, Typecast and Resemble AI, and the best score takes it.
The rules are public in stack-rules.json, and how the stack builder scores explains the tie-break.
Alternatives the same rules name
- ElevenLabs: Lifelike AI voices and voiceovers in many languages, and sound effects made from a text description, paid from the same credits. From free.
- Murf AI: Turns typed text into narrated audio with a library of synthetic voices and a timeline editor for voiceovers. From free.
- WellSaid: Makes voiceover audio from text with a set of synthetic voices, priced by the minutes you download. From free.
- Speechify Studio: An online studio that makes voiceovers and dubbing from text with synthetic voices. From free.
- Typecast: Character voices for explainers and animation. From free.
- Resemble AI: Voice cloning with watermarking and deepfake detection. From free.
Signals and what people say
- Hacker News, 30 days to October 9, 2026: 1 story
Change log
- October 9, 2026: added to the tool list; plans and prices first recorded from cartesia.ai/pricing.
Logo: Nameryn monogram (no free mark on file), CC0 1.0.