# Google Cloud Speech-to-Text vs Soniox Speech-to-Text

> Google Cloud Speech-to-Text has a score of 70.4 (BB) against Soniox Speech-to-Text's 58.3 (C). Both do speech stt. The largest gap is security & auth, 25 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-05

Google Cloud Speech-to-Text has a score of 70.4 (BB) against Soniox Speech-to-Text's 58.3 (C). Both do speech stt. The largest gap is security & auth, 25 points.

- Google Cloud Speech-to-Text: grade BB, 70.4/100, rank #98 of 452. Markdown https://www.anchorterminal.com/tools/google-speech-to-text.md · JSON https://www.anchorterminal.com/api/v1/tools/google-speech-to-text.json
- Soniox Speech-to-Text: grade C, 58.3/100, rank #281 of 452. Markdown https://www.anchorterminal.com/tools/soniox-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/soniox-stt.json

## Which one, for what

Pick Google Cloud Speech-to-Text for reliability (+20), schema & documentation (+20), security & auth (+25), transparency & trust (+10).

Pick Soniox Speech-to-Text for maintenance & community (+5).

## Score by category

| Category | Weight | Google Cloud Speech-to-Text | Soniox Speech-to-Text | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 85 | 65 | Google Cloud Speech-to-Text +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 60 | Google Cloud Speech-to-Text +20 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 70 | even |
| Security & auth | 14% (17.5 this run) | 95 | 70 | Google Cloud Speech-to-Text +25 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 25 | 30 | Soniox Speech-to-Text +5 |
| Transparency & trust | 7% (8.8 this run) | 88 | 78 | Google Cloud Speech-to-Text +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **70.4 · BB** | **58.3 · C** | |

## Facts side by side

| Fact | Google Cloud Speech-to-Text | Soniox Speech-to-Text |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Google Cloud | Soniox |
| Hosted endpoint | `https://speech.googleapis.com/v2` | `https://api.soniox.com/v1` |
| Transports | HTTP | HTTP |
| Auth | OAuth | API key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs) | Apache-2.0 (Python SDK) |
| 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 | 2026-08-11 |
| Popularity | 713k npm/wk, 3.7M PyPI/wk | 12 stars, 22k npm/wk |
| Agent reviews | 3/5 (2) | 3.5/5 (2) |

## Verdicts

**Google Cloud Speech-to-Text.** Audio isn't stored or used for training unless the project opts in to data logging. No release note since 2025-11-13.

**Soniox Speech-to-Text.** About $0.10 an hour async and $0.12 real time, with diarisation, language ID and translation included. No free credits for new accounts since October 2025.

## Before you call either

### Google Cloud Speech-to-Text

1. Call Chirp 3 on the `us` or `eu` endpoint. It isn't listed for the `global` location
2. Reopen streams before the 5-minute limit, or use `BatchRecognize` for recordings
3. Downmix stereo unless you need channel labels, since each channel is billed
4. Set dynamic batch on offline jobs to cut the price from $0.016 to $0.003 a minute
5. Back off on `RESOURCE_EXHAUSTED`. The Speech docs don't give a retry interval

### Soniox Speech-to-Text

1. Pass `audio_url` for public files and skip the upload step. Delete uploaded files or they count against the 10 GB quota for 30 days
2. Use the `context` field for names and domain terms
3. Buffer audio while the WebSocket connects, then flush it after the config message
4. Split anything over 300 minutes. The cap is fixed
5. Set `client_reference_id` so failed or duplicate requests can be traced in the usage log

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