# DeepL API vs Lokalise

> DeepL API and Lokalise score within a point of each other on agent readiness, 72 (BB) and 71.3 (BB). Lokalise leads on reliability. Both do translate text. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/deepl-api-vs-lokalise
- Markdown: https://www.anchorterminal.com/compare/deepl-api-vs-lokalise.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/deepl-api-vs-lokalise.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/deepl-api-vs-lokalise.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

DeepL API and Lokalise score within a point of each other on agent readiness, 72 (BB) and 71.3 (BB). Lokalise leads on reliability. Both do translate text.

- DeepL API: grade BB, 72/100, rank #98 of 722. Markdown https://www.anchorterminal.com/tools/deepl-api.md · JSON https://www.anchorterminal.com/api/v1/tools/deepl-api.json
- 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

## Which one, for what

### DeepL API (BB)

Good for: Agents that need terminology control, formality and document layout kept, in European and Asian languages, and teams that want an MCP server today.

Ahead on:
- Schema & documentation, 95 against 76
- Agent ergonomics, 83 against 69
- Security & auth, 82 against 73

Also in its favour:
- Runs on your own machine

Watch for: API Free and API Pro can't be bought any more, and API Developer's 1 million characters never reset

### 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 52

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


## Score by category

| Category | Weight | DeepL API | Lokalise | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 52 | 84 | Lokalise +32 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 95 | 76 | DeepL API +19 |
| Agent ergonomics | 13% (16.2 this run) | 83 | 69 | DeepL API +14 |
| Security & auth | 14% (17.5 this run) | 82 | 73 | DeepL API +9 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 84 | DeepL API +3 |
| Transparency & trust | 7% (8.8 this run) | 80 | 81 | Lokalise +1 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **72 · BB** | **71.3 · BB** | |

## Facts side by side

| Fact | DeepL API | Lokalise |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | DeepL | Lokalise, Inc. |
| Hosted endpoint | `https://api.deepl.com/v2/translate` | `https://api.lokalise.com/api2` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | MIT (MCP server) | Proprietary service under the Lokalise Master Service Agreement. The CLI and the Node SDK on GitHub are BSD 3-Clause |
| Tools exposed | 13 | none |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-10-05 |
| Terms last updated | 2026-08-01 | 2025-11-01 |
| Privacy policy last updated | 2026-09-01 | 2026-03-01 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| 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 | 117 stars, 328k npm/wk, 291k PyPI/wk | 124 stars, 338k npm/wk, 39k PyPI/wk |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**DeepL API.** Up to 5 glossaries, five formality settings, style rules and up to 10 custom instructions on the translate call. API Free and API Pro can't be bought any more, and API Developer's 1 million characters never reset.

**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.

## Before you call either

### DeepL API

1. Match the host to the key. Keys ending `:fx` go to api-free.deepl.com, others to api.deepl.com
2. Send the key in the `Authorization: DeepL-Auth-Key` header, since query and body keys now get 403
3. Retry 429 and 529 with exponential backoff but stop on 456, which means the quota is spent
4. Set `tag_handling` to html for markup so the tags survive and aren't billed
5. Put a key-level usage limit on any key an agent holds, and scope it to the endpoints it needs

### 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`.

## Questions

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

DeepL API and Lokalise score within a point of each other on agent readiness, 72 (BB) and 71.3 (BB). Lokalise leads on reliability.

### Do DeepL API and Lokalise need an API key?

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

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

Yes. DeepL API has a hosted endpoint at https://api.deepl.com/v2/translate and Lokalise at https://api.lokalise.com/api2.


## For agents

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

## Other comparisons with DeepL API or Lokalise

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