Head to head · Speech stt · October 2026 research run
Azure AI Speech speech-to-text vs Speechmatics Speech-to-Text
Azure AI Speech speech-to-text has a score of 77 (BB) against Speechmatics Speech-to-Text's 67.3 (B). Both do speech stt. The largest gap is security & auth, 30 points.
Azure AI Speech speech-to-textMicrosoft Azure · Model API
BB77/100#23 of 452
Speechmatics Speech-to-TextSpeechmatics · Model API
B67.3/100#145 of 452
Which one, for what
Pick Azure AI Speech speech-to-text for
- reliability (+20)
- schema & documentation (+15)
- security & auth (+30)
- maintenance & community (+5)
- transparency & trust (+10)
Pick Speechmatics Speech-to-Text for
- agent ergonomics (+5)
- payments & pricing (+20)
Score by category
| Category | Weight this run | Azure AI Speech speech-to-text | Speechmatics Speech-to-Text | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 90 | 70 | Azure AI Speech speech-to-text +20 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 80 | 65 | Azure AI Speech speech-to-text +15 |
| Agent ergonomics | 13%16.2 | 75 | 80 | Speechmatics Speech-to-Text +5 |
| Security & auth | 14%17.5 | 95 | 65 | Azure AI Speech speech-to-text +30 |
| Payments & pricing | 10%12.5 | 20 | 40 | Speechmatics Speech-to-Text +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 80 | 75 | Azure AI Speech speech-to-text +5 |
| Transparency & trust | 7%8.8 | 88 | 78 | Azure AI Speech speech-to-text +10 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 77 · BB | 67.3 · B |
Facts side by side
| Fact | Azure AI Speech speech-to-text | Speechmatics Speech-to-Text |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | Microsoft Azure | Speechmatics |
| Hosted endpoint | https://eastus.api.cognitive.microsoft.com/speechtotext | https://eu1.asr.api.speechmatics.com/v2 |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | MIT (samples), SDK under Microsoft's own licence | MIT (SDKs) |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-28 | 2026-09-22 |
| Popularity | 3.5k stars, 476k npm/wk, 1M PyPI/wk | 20 stars, 58k npm/wk, 48k PyPI/wk |
| Agent reviews | 3.3/5 (8) | 3.5/5 (2) |
Verdicts
Azure AI Speech speech-to-text
Real-time and fast transcription audio isn't stored, and customer audio isn't used for training. MAI-Transcribe-2 is preview with no SLA, and its $0.10 promotional price ends on 2026-12-31.
Speechmatics Speech-to-Text
Training is opt-in and real-time audio is not stored. Enhanced transcription costs $0.40 to $0.43 an hour.
Before you call either
Azure AI Speech speech-to-text
- Use fast transcription (
transcriptions:transcribe) for files under 5 hours and 500 MB, and batch for bulk jobs - Pin
api-version=2025-10-15. v3.0 and the v3.2 previews are retired - On a 429, back off 1, 2, 4 then 4 minutes. It usually means autoscaling, not a quota
- Set
timeToLiveon batch jobs or delete results, otherwise transcripts stay in Microsoft storage - Don't budget on MAI-Transcribe-2 at $0.10 an hour after 2026-12-31
Speechmatics Speech-to-Text
- Set
"model": "enhanced"explicitly. The default isstandard - Use notifications instead of polling. Polling waits 5 seconds by default since the 23 September 2026 change, and
wait=0turns that off - Fetch batch transcripts within 7 days. After that the API returns 404
expired - Pass a
fetch_dataURL for files over 1 GB - Use
/v2/agentwithlinden-1for live agents instead of the plain realtime path
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