# Azure AI Speech speech-to-text vs Cartesia Ink (slim)

> Azure AI Speech speech-to-text scores 73 (BB) to Cartesia Ink's 67.9 (B) for speech-to-text. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt.md (~2,900 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt.json · canonical https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Azure AI Speech speech-to-text scores 73 (BB) on agent readiness against Cartesia Ink's 67.9 (B), and leads in 4 of 7 scored categories. Cartesia Ink leads on schema & documentation, payments & pricing and maintenance & community. Both do speech-to-text.

- Azure AI Speech speech-to-text: BB 73, rank #93 of 950 · https://www.anchorterminal.com/tools/azure-speech-to-text.min.md
- Cartesia Ink: B 67.9, rank #238 of 950 · https://www.anchorterminal.com/tools/cartesia-ink-stt.min.md
- Azure AI Speech speech-to-text, good for Teams on Azure who need several modes (real time, synchronous files, cheap batch, custom models) under one resource, or strict default data handling. Ahead on Reliability, 80 against 73; Security & auth, 85 against 52; Transparency & trust, 85 against 67. Also Agent-ready, a grade of BB or better.
- 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; Payments & pricing, 35 against 20; Maintenance & community, 85 against 80.

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

| Fact (where they differ) | Azure AI Speech speech-to-text | Cartesia Ink |
| --- | --- | --- |
| Vendor | Microsoft Azure | Cartesia |
| Hosted endpoint | `https://eastus.api.cognitive.microsoft.com/speechtotext` | `https://api.cartesia.ai` |
| Transports | HTTP | HTTP, websocket, Streamable HTTP |
| Auth | OAuth or key | API key |
| Licence | MIT (samples), SDK under Microsoft's own licence | Proprietary hosted service under the Cartesia Terms of Service. The Python and JavaScript SDKs are Apache-2.0 |
| llms.txt | no | yes |
| Last release | 2026-09-28 | 2026-09-17 |
| Terms last updated | couldn't be read | 2024-06-14 |
| Privacy policy last updated | 2026-09-01 | 2024-06-14 |
| Customer content may train models | yes | yes, with an opt-out |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 3.5k stars, 476k npm/wk, 1M PyPI/wk | 134 stars |
| Agent reviews | 3.3/5 (8) | none |