# Crowdin vs LibreTranslate

> Crowdin scores 69.6 (B) on agent readiness against LibreTranslate's 49.8 (D), and leads in 6 of 7 scored categories. LibreTranslate leads on payments & pricing. Both do translate text. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate
- Markdown: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Crowdin scores 69.6 (B) on agent readiness against LibreTranslate's 49.8 (D), and leads in 6 of 7 scored categories. LibreTranslate leads on payments & pricing. Both do translate text.

- Crowdin: grade B, 69.6/100, rank #153 of 722. Markdown https://www.anchorterminal.com/tools/crowdin.md · JSON https://www.anchorterminal.com/api/v1/tools/crowdin.json
- LibreTranslate: grade D, 49.8/100, rank #602 of 722. Markdown https://www.anchorterminal.com/tools/libretranslate.md · JSON https://www.anchorterminal.com/api/v1/tools/libretranslate.json

## Which one, for what

### Crowdin (B)

Good for: Teams that keep product strings and files in Crowdin and want an agent to upload sources, check progress, apply pre-translation, manage glossaries and pull builds.

Ahead on:
- Reliability, 78 against 35
- Schema & documentation, 80 against 65
- Security & auth, 68 against 45
- Maintenance & community, 82 against 40
- Transparency & trust, 79 against 60

Watch for: The terms forbid accessing the service to monitor availability, performance or functionality, or for benchmarking, without Crowdin's prior written consent

### LibreTranslate (D)

Good for: Operators who must keep text on their own servers or want a fixed cost, and for light hosted use.

Ahead on:
- Payments & pricing, 40 against 30

Also in its favour:
- Open source

Watch for: No status page, SLA or terms of service for the hosted API


## Score by category

| Category | Weight | Crowdin | LibreTranslate | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 78 | 35 | Crowdin +43 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 65 | Crowdin +15 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 65 | Crowdin +4 |
| Security & auth | 14% (17.5 this run) | 68 | 45 | Crowdin +23 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | LibreTranslate +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 40 | Crowdin +42 |
| Transparency & trust | 7% (8.8 this run) | 79 | 60 | Crowdin +19 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **69.6 · B** | **49.8 · D** | |

## Facts side by side

| Fact | Crowdin | LibreTranslate |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Crowdin OÜ | LibreTranslate |
| Hosted endpoint | `https://api.crowdin.com/api/v2` | `https://libretranslate.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | Proprietary service under Crowdin's terms. The CLI and the official API clients are MIT | AGPL-3.0 |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-09-30 | 2026-05-26 |
| Terms last updated | 2026-09-24 | no document linked |
| Privacy policy last updated | 2026-09-24 | 2025-09-23 |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 320 stars, 264k npm/wk, 14k PyPI/wk | 17k stars, 4.5k PyPI/wk |
| Agent reviews | none | 4/5 (2) |

## Verdicts

**Crowdin.** The REST API has a public OpenAPI document with 374 operations, and tokens can be limited by scope, access level and project. Translation runs inside Crowdin projects and connected engines, so it is not a stateless per-character translation API. No Retry-After guidance, idempotency keys or SLA were found in the reviewed documentation.

**LibreTranslate.** Open source under AGPL-3.0, self-hosted with no text leaving your network. No status page, SLA or terms of service for the hosted API.

## Before you call either

### Crowdin

1. Send `Authorization: Bearer <token>` to `https://api.crowdin.com/api/v2`. Crowdin Enterprise uses `https://<organization_domain>.api.crowdin.com/api/v2`
2. Use the MCP V2 endpoint `https://mcp.crowdin.com/v2/mcp` and set `crowdin-tool-sets`, because the server loads all 33 tool sets by default
3. Set `crowdin-read-only: true` on the MCP connection for exploration. It exposes only list and get tools
4. Keep to 20 concurrent requests an account across all tokens, and add your own backoff on 429
5. Upload a file to `/storages` first, then pass the `storageId` to the add-file call. Builds, exports and reports are asynchronous and need a status poll
6. `/mts/{mtId}/translations` takes at most 100 strings a call and needs the `mt` scope and a configured engine

### LibreTranslate

1. Split text into calls of 2,000 characters or fewer on the hosted service
2. Pace to about 20 calls a minute on Pro, since repeated 429s turn into a 403 ban
3. Pass `source=auto` to detect and translate in one call
4. Set `format=html` for markup
5. Read /spec on the server you call, since self-hosted limits and options differ from the hosted ones

## Questions

### Which is better for AI agents, Crowdin or LibreTranslate?

Crowdin scores 69.6 (B) on agent readiness against LibreTranslate's 49.8 (D), and leads in 6 of 7 scored categories. LibreTranslate leads on payments & pricing.

### Do Crowdin and LibreTranslate need an API key?

Crowdin takes an API key or an OAuth sign-in. LibreTranslate needs an API key.

### Can an agent call Crowdin and LibreTranslate without installing anything?

Yes. Crowdin has a hosted endpoint at https://api.crowdin.com/api/v2 and LibreTranslate at https://libretranslate.com.

### Are Crowdin and LibreTranslate open source?

No open-source release is listed for Crowdin. LibreTranslate is open source (AGPL-3.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate.json, and with the fewest tokens: https://www.anchorterminal.com/compare/crowdin-vs-libretranslate.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "crowdin", "b": "libretranslate"}`. From a terminal: `anchor compare crowdin libretranslate`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/crowdin.json and https://www.anchorterminal.com/api/v1/tools/libretranslate.json

## Other comparisons with Crowdin or LibreTranslate

- [Amazon Translate vs Crowdin](https://www.anchorterminal.com/compare/amazon-translate-vs-crowdin.md)
- [Amazon Translate vs LibreTranslate](https://www.anchorterminal.com/compare/amazon-translate-vs-libretranslate.md)
- [Azure Translator vs Crowdin](https://www.anchorterminal.com/compare/azure-translator-vs-crowdin.md)
- [Azure Translator vs LibreTranslate](https://www.anchorterminal.com/compare/azure-translator-vs-libretranslate.md)
- [Crowdin vs DeepL API](https://www.anchorterminal.com/compare/crowdin-vs-deepl-api.md)
- [Crowdin vs Google Cloud Translation](https://www.anchorterminal.com/compare/crowdin-vs-google-cloud-translation.md)
- [Crowdin vs Lara Translate API](https://www.anchorterminal.com/compare/crowdin-vs-lara-translate.md)
- [Crowdin vs Lingo.dev](https://www.anchorterminal.com/compare/crowdin-vs-lingo-dev.md)
- [Crowdin vs Lingvanex Translation API](https://www.anchorterminal.com/compare/crowdin-vs-lingvanex.md)
- [Crowdin vs Lokalise](https://www.anchorterminal.com/compare/crowdin-vs-lokalise.md)
- [Crowdin vs Phrase](https://www.anchorterminal.com/compare/crowdin-vs-phrase.md)
- [Crowdin vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/crowdin-vs-systran.md)
- [DeepL API vs LibreTranslate](https://www.anchorterminal.com/compare/deepl-api-vs-libretranslate.md)
- [Google Cloud Translation vs LibreTranslate](https://www.anchorterminal.com/compare/google-cloud-translation-vs-libretranslate.md)
- [Lara Translate API vs LibreTranslate](https://www.anchorterminal.com/compare/lara-translate-vs-libretranslate.md)
- [LibreTranslate vs Lingo.dev](https://www.anchorterminal.com/compare/libretranslate-vs-lingo-dev.md)
- [LibreTranslate vs Lingvanex Translation API](https://www.anchorterminal.com/compare/libretranslate-vs-lingvanex.md)
- [LibreTranslate vs Lokalise](https://www.anchorterminal.com/compare/libretranslate-vs-lokalise.md)
- [LibreTranslate vs Phrase](https://www.anchorterminal.com/compare/libretranslate-vs-phrase.md)
- [LibreTranslate vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/libretranslate-vs-systran.md)