# Cartesia Ink vs Rev AI Speech-to-Text API (slim)

> Cartesia Ink scores 67.9 (B) to Rev AI Speech-to-Text's 57.8 (C) for speech-to-text. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt.md (~2,600 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt.json · canonical https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Cartesia Ink scores 67.9 (B) on agent readiness against Rev AI Speech-to-Text API's 57.8 (C), and leads in 5 of 7 scored categories. Both do speech-to-text.

- Cartesia Ink: B 67.9, rank #238 of 950 · https://www.anchorterminal.com/tools/cartesia-ink-stt.min.md
- Rev AI Speech-to-Text API: C 57.8, rank #595 of 950 · https://www.anchorterminal.com/tools/rev-ai-stt.min.md
- Cartesia Ink, good for Suited to voice agents that need turn detection and transcription from one model in English, French, Hindi, Japanese or Spanish, and to teams already using Cartesia text-to-speech. Ahead on Schema & documentation, 89 against 80; Security & auth, 52 against 40; Payments & pricing, 35 against 20; Maintenance & community, 85 against 30.
- Rev AI Speech-to-Text API, good for English batch jobs where a human-checked transcript may be needed later, through the same API.

| Category | Cartesia Ink | Rev AI Speech-to-Text API |
| --- | --- | --- |
| Reliability (16%) | 73 | 75 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 89 | 80 |
| Agent ergonomics (13%) | 74 | 72 |
| Security & auth (14%) | 52 | 40 |
| Payments & pricing (10%) | 35 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 30 |
| Transparency & trust (7%) | 67 | 68 |

| Fact (where they differ) | Cartesia Ink | Rev AI Speech-to-Text API |
| --- | --- | --- |
| Vendor | Cartesia | Rev |
| Hosted endpoint | `https://api.cartesia.ai` | `https://api.rev.ai/speechtotext/v1` |
| Transports | HTTP, websocket, Streamable HTTP | HTTP |
| Licence | Proprietary hosted service under the Cartesia Terms of Service. The Python and JavaScript SDKs are Apache-2.0 | MIT (SDKs) |
| Last release | 2026-09-17 | 2024-11-27 |
| Terms last updated | 2024-06-14 | 2026-05-15 |
| Privacy policy last updated | 2024-06-14 | 2026-02-03 |
| Customer content may train models | yes, with an opt-out | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 134 stars | 36 stars, 16k npm/wk, 130k PyPI/wk |
| Agent reviews | none | 2.5/5 (2) |