# IBM Watson Speech to Text vs Speechmatics Speech-to-Text (slim)

> Speechmatics Speech-to-Text scores 67.8 (B) to IBM Watson Speech to Text's 54.5 (C) for speech-to-text. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/ibm-watson-stt-vs-speechmatics-stt.md (~4,500 tokens) · this version ~2,030 tokens · JSON https://www.anchorterminal.com/compare/ibm-watson-stt-vs-speechmatics-stt.json · canonical https://www.anchorterminal.com/compare/ibm-watson-stt-vs-speechmatics-stt
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
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Speechmatics Speech-to-Text scores 67.8 (B) on agent readiness against IBM Watson Speech to Text's 54.5 (C), and leads in 4 of 7 scored categories. Both do speech-to-text.

- IBM Watson Speech to Text: C 54.5, rank #904 of 1486 · https://www.anchorterminal.com/tools/ibm-watson-stt.min.md
- Speechmatics Speech-to-Text: B 67.8, rank #305 of 1486 · https://www.anchorterminal.com/tools/speechmatics-stt.min.md
- IBM Watson Speech to Text, good for Enterprises on IBM Cloud needing custom acoustic models, HIPAA on Premium and many locations. Also No incidents deducted, where Speechmatics Speech-to-Text loses 3 points for them.
- Speechmatics Speech-to-Text, good for Regulated or privacy-sensitive audio, multilingual batch with Melia 1, and voice agents that want speaker-attributed turns. Ahead on Reliability, 70 against 40; Schema & documentation, 90 against 55; Agent ergonomics, 80 against 66; Maintenance & community, 70 against 33. Also A hosted endpoint, with nothing to install; Free to start without a card.

| Category | IBM Watson Speech to Text | Speechmatics Speech-to-Text |
| --- | --- | --- |
| Reliability (16%) | 40 | 70 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 55 | 90 |
| Agent ergonomics (13%) | 66 | 80 |
| Security & auth (14%) | 68 | 65 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 33 | 70 |
| Transparency & trust (7%) | 80 | 76 |

| Fact (where they differ) | IBM Watson Speech to Text | Speechmatics Speech-to-Text |
| --- | --- | --- |
| Vendor | IBM | Speechmatics |
| Hosted endpoint | no (local only) | `https://eu1.asr.api.speechmatics.com/v2` |
| Transports | HTTP, websocket | HTTP |
| Pricing | Freemium | Pay per use |
| Price for speech-to-text | not published | $0.0025 per minute of audio |
| Licence | none | MIT (SDKs) |
| Tools exposed | 0 | none |
| llms.txt | no | yes |
| Last release | 2026-06-29 | 2026-10-26 |
| Privacy policy last updated | 2026-08-25 | 2026-05-27 |
| Terms restrict benchmarking | not found in the text | yes |
| Popularity | none | 20 stars, 58k npm/wk, 48k PyPI/wk |
| Agent reviews | none | 3.5/5 (2) |

Why the edge:
- Maintenance & community, Speechmatics Speech-to-Text +37: IBM Watson Speech to Text 33 (Read as a model. The newest release note is 29 June 2026 (`parameter_set` for large speech models), 130 days ago (10). No dated entries in the 90 days from 8 August (0). Release notes, IBM support and a public docs repository last changed 30 June 2026 (8 of 15). Official SDKs, `ibm-watson` 11.2.0 on PyPI (26 January 2026) and 12.2.0 on npm (January 2026) (10 of 15). CI not read (5 of 10). Total 33.); Speechmatics Speech-to-Text 70 (Model reading of the checklist, deprecation notice and support in place of release counts and issue replies. Changelog entries on 29 October 2026 for Batch SaaS and Agent STT, and speechmatics-rt 1.2.2 tagged on 26 October (30). Far more than three dated entries since 3 August, nine in October on the changelog's first page alone (10 of 10). No deprecation policy, and `operating_point`, the `region` field and the Voice SDK are marked deprecated with no removal date (0 of 10). A public changelog, a support portal with chat and email, and a community channel (10 of 15). SDK issues and reply times couldn't be read (0 of 10). Python packages speechmatics-batch 1.1.0 and speechmatics-rt 1.2.2, and JavaScript batch-client and real-time-client, current (15). A test workflow in the Python SDK, results not seen (5 of 10).)
- Schema & documentation, Speechmatics Speech-to-Text +35: IBM Watson Speech to Text 55 (No public OpenAPI or other machine-readable definition was found (0). No llms.txt (0). The reference says which parameters each model family supports and the docs cover each feature (15 of 20). Typed parameters with defaults, ranges and enums (13 of 15). curl and SDK examples on every method, and errors with `error`, `code`, `code_description` and `warnings`, with invalid arguments reported as warnings (12 of 15). Versioned `/v1` paths and dated release notes back to 2015 (15). Total 55.); Speechmatics Speech-to-Text 90 (A Swagger 2.0 file for the Batch API (5 paths, `/jobs`, `/jobs/{jobid}`, its transcript and log, and `/usage`) is linked from the API reference as a download, and has been since July 2025, and the public docs repository holds AsyncAPI 3.0 files for Realtime and Agent STT (25). llms.txt and Markdown pages (10). Reference and guide pages state purpose, and the models page says where Melia 1 and Oak 1 differ from Enhanced (15). Options are documented with types and enums, but a batch job's options travel as a JSON string in the multipart `config` field (10). Examples for each capability and documented errors, 429 reasons, 404 `expired` after 7 days and `Job rejected` (15). Versioned `/v2` paths and a dated public changelog (15).)
- Reliability, Speechmatics Speech-to-Text +30: IBM Watson Speech to Text 40 (IBM Cloud has a status page at cloud.ibm.com/status, but it is drawn by script and showed no components or history to our reader, read as gemini-live's script-shell page was (10 of 20, and 5 for no readable history). Plus allows up to 100 concurrent transcription requests across WebSocket and HTTP (15). No 429 or backoff guidance was found in the API reference or the docs repository (0). No SLA was read for the service (0, unchecked). Next-generation and large speech models are GA, language by language (10). 10 + 5 + 15 + 0 + 0 + 10 = 40.); Speechmatics Speech-to-Text 70 (Statuspage at status.speechmatics.com with components per region and history (20). Since 3 August, minor incidents only, each touching one region, one mode or a subset of requests. Batch AU slower for 2 hours on 10 August, a subset of Batch EU1, US1 and US2 jobs failing or slow for 56 minutes on 19 August, Realtime 4003 errors in the EU and US for 37 minutes on 4 September, and TLS errors for a subset of US Realtime sessions for about 2 hours on 10 September. The rest were scheduled database maintenance, a portal maintenance and a billing credit error, and nothing was posted after 10 September (20). Limits published with numbers, 10 new batch jobs and 50 status calls a second, 20,000 concurrent jobs, and 2 or 50 realtime sessions by plan (15). Both batch limits return 429 with a reason, but the docs only suggest notifications instead of polling and give no backoff or Retry-After (5). No SLA found for self-serve plans (0). Batch, Realtime and Agent STT on `/v2/agent` are GA (10).)
- Agent ergonomics, Speechmatics Speech-to-Text +14: IBM Watson Speech to Text 66 (API reading of the checklist. Timestamps, word confidence, alternatives and speaker labels are opt-in (15 of 25). Async jobs and custom models list, and async results can go to a callback URL (12 of 20). Structured errors and warnings an agent can act on (15 of 20). Async jobs take a `user_token`, results have a TTL, and jobs can be deleted, with no idempotency key (12 of 20). Most parameters are optional. Official SDKs including Python, Node and Swift, though the Python and Node SDKs last released in January 2026 (12 of 15). Total 66.); Speechmatics Speech-to-Text 80 (API reading of the checklist. Transcripts can be fetched as `txt`, `json-v2` or `srt` (20). The jobs list pages by creation date and limit (20). Documented status codes and realtime error messages an agent can act on (15). No idempotency key on job creation (10). A batch job needs a file and a language. Official SDKs in Python and JavaScript, split into batch and realtime packages (15).)

| Task | IBM Watson Speech to Text | Speechmatics Speech-to-Text |
| --- | --- | --- |
| Transcribe a one-hour meeting | $0.60 to $1.20 | $0.12 to $0.40 |