# Lokalise vs SYSTRAN Translate API

> Lokalise scores 71.3 (BB) on agent readiness against SYSTRAN Translate API's 40 (E), and leads in 6 of 7 scored categories. SYSTRAN Translate API leads on payments & pricing. Both do translate text. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/lokalise-vs-systran
- Markdown: https://www.anchorterminal.com/compare/lokalise-vs-systran.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/lokalise-vs-systran.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/lokalise-vs-systran.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

Lokalise scores 71.3 (BB) on agent readiness against SYSTRAN Translate API's 40 (E), and leads in 6 of 7 scored categories. SYSTRAN Translate API leads on payments & pricing. Both do translate text.

- Lokalise: grade BB, 71.3/100, rank #115 of 722. Markdown https://www.anchorterminal.com/tools/lokalise.md · JSON https://www.anchorterminal.com/api/v1/tools/lokalise.json
- SYSTRAN Translate API: grade E, 40/100, rank #691 of 722. Markdown https://www.anchorterminal.com/tools/systran.md · JSON https://www.anchorterminal.com/api/v1/tools/systran.json

## Which one, for what

### Lokalise (BB)

Good for: Agents that manage localisation work, such as adding keys, uploading and exporting string files, keeping a glossary and starting AI or machine translation tasks for a team that already uses Lokalise.

Ahead on:
- Reliability, 84 against 25
- Schema & documentation, 76 against 42
- Agent ergonomics, 69 against 54
- Security & auth, 73 against 55
- Maintenance & community, 84 against 4
- Transparency & trust, 81 against 51

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: The Master Service Agreement forbids using the service for benchmarking or competitive analysis

### SYSTRAN Translate API (E)

Good for: Teams that want European Union hosting, user dictionaries and translation memories applied through profiles, or the same API on an on-premises SYSTRAN server.

Ahead on:
- Payments & pricing, 40 against 30

Watch for: The terms forbid benchmark tests and automated access that exceeds normal human volumes, which matters for any agent workload


## Score by category

| Category | Weight | Lokalise | SYSTRAN Translate API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 84 | 25 | Lokalise +59 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 76 | 42 | Lokalise +34 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 54 | Lokalise +15 |
| Security & auth | 14% (17.5 this run) | 73 | 55 | Lokalise +18 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | SYSTRAN Translate API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 84 | 4 | Lokalise +80 |
| Transparency & trust | 7% (8.8 this run) | 81 | 51 | Lokalise +30 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **71.3 · BB** | **40 · E** | |

## Facts side by side

| Fact | Lokalise | SYSTRAN Translate API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Lokalise, Inc. | SYSTRAN (ChapsVision) |
| Hosted endpoint | `https://api.lokalise.com/api2` | `https://api-translate.systran.net` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the Lokalise Master Service Agreement. The CLI and the Node SDK on GitHub are BSD 3-Clause | Proprietary service under the SYSTRAN Translate PRO terms and conditions |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-10-05 | 2023-06-16 |
| Terms last updated | 2025-11-01 | no date given |
| Privacy policy last updated | 2026-03-01 | no document linked |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 124 stars, 338k npm/wk, 39k PyPI/wk | none |

## Verdicts

**Lokalise.** The REST API has public OpenAPI files, Markdown docs, published rate limits, read-only tokens, scoped OAuth and an audit log endpoint. Access needs a paid plan after a 14-day trial, a person signs up in a browser, and the Master Service Agreement forbids benchmarking. No idempotency keys or deprecation policy were found in the reviewed documentation.

**SYSTRAN Translate API.** Five documented REST APIs cover text, files, dictionaries, translation memories and profiles, with a Google-compatible mode and a public price of €14.99 per million characters. The reference pages date from June 2023, and no changelog, status page, rate limit, SDK or downloadable OpenAPI file was found. The terms bar benchmark tests and automated use beyond human volumes.

## Before you call either

### Lokalise

1. Send the token in the `X-Api-Token` header to `https://api.lokalise.com/api2`. OAuth access tokens go in `Authorization: Bearer` and expire after about 60 minutes.
2. Stay under 6 requests a second per token and 10 concurrent requests per project. On 429, back off exponentially and read `X-RateLimit-Reset`.
3. Use a read-only token for reads. A read/write token can call `PUT /projects/{project_id}/empty`, which deletes every key and translation.
4. Use `pagination=cursor` on `/keys` and `/translations`, with `limit` at most 500 on keys, and follow `X-Pagination-Next-Cursor`.
5. Projects above 10,000 key-language pairs need `/files/async-download`. Poll `/processes/{process_id}` for the bundle URL, and do the same after `/files/upload`.

### SYSTRAN Translate API

1. Send the key as `Authorization: Key <api_key>` and avoid the documented `?key=` query option, which puts the secret in URLs and logs
2. Expect HTTP 400, not 401, when credentials are missing. The body reads `No key / credentials provided`
3. Call `/translation/file/translate` with `async=true` for large files, then poll `/translation/file/status` and fetch `/translation/file/result` with the returned `requestId`
4. Apply dictionaries and translation memories through a profile and pass its UUID as `profile`. `withDictionary` and `withCorpus` are deprecated
5. Read the terms before automating. They bar benchmark tests and request volumes beyond normal human use, and SYSTRAN may throttle or suspend access

## Questions

### Which is better for AI agents, Lokalise or SYSTRAN Translate API?

Lokalise scores 71.3 (BB) on agent readiness against SYSTRAN Translate API's 40 (E), and leads in 6 of 7 scored categories. SYSTRAN Translate API leads on payments & pricing.

### Do Lokalise and SYSTRAN Translate API need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Lokalise and SYSTRAN Translate API without installing anything?

Yes. Lokalise has a hosted endpoint at https://api.lokalise.com/api2 and SYSTRAN Translate API at https://api-translate.systran.net.


## For agents

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

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