# Lingo.dev vs Smartcat

> Lingo.dev scores 62.4 (B) to Smartcat's 54.3 (C) for translation. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/lingo-dev-vs-smartcat
- Markdown: https://www.anchorterminal.com/compare/lingo-dev-vs-smartcat.md (~2,550 tokens)
- Slim: https://www.anchorterminal.com/compare/lingo-dev-vs-smartcat.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/lingo-dev-vs-smartcat.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-29

Lingo.dev scores 62.4 (B) on agent readiness against Smartcat's 54.3 (C), and leads in 4 of 7 scored categories. Smartcat leads on schema & documentation and payments & pricing. Both do translation.

- Lingo.dev: grade B, 62.4/100, rank #499 of 1223. Markdown https://www.anchorterminal.com/tools/lingo-dev.md · JSON https://www.anchorterminal.com/api/v1/tools/lingo-dev.json
- Smartcat: grade C, 54.3/100, rank #810 of 1223. Markdown https://www.anchorterminal.com/tools/smartcat.md · JSON https://www.anchorterminal.com/api/v1/tools/smartcat.json
- Best machine translation APIs for AI agents: https://www.anchorterminal.com/best/translation/index.md
- All 78 translation comparisons: https://www.anchorterminal.com/compare/translation/index.md

## Which one, for what

### Lingo.dev (B)

Good for: Product teams that translate interface strings and content into many locales and want glossary, tone and rule control held in one place, driven from code, CI or a coding assistant.

Ahead on:
- Reliability, 71 against 56
- Agent ergonomics, 75 against 57
- Security & auth, 62 against 42
- Maintenance & community, 87 against 69

Watch for: No public OpenAPI file was found, `llms.txt` holds one title line and docs pages have no Markdown version

### Smartcat (C)

Good for: Agents that run translation projects for a team already on a Smartcat Anticipate or higher plan, such as uploading documents, applying translation memories and glossaries, exporting results and calling real-time translation from an app.

Ahead on:
- Schema & documentation, 67 against 54
- Payments & pricing, 25 against 20

Also in its favour:
- Free to start without a card

Watch for: API access is listed only from the Anticipate plan, $60,000 a year per the help centre, while the pricing FAQ says the trial includes it


## Score by category

| Category | Weight | Lingo.dev | Smartcat | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 71 | 56 | Lingo.dev +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 54 | 67 | Smartcat +13 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 57 | Lingo.dev +18 |
| Security & auth | 14% (17.5 this run) | 62 | 42 | Lingo.dev +20 |
| Payments & pricing | 10% (12.5 this run) | 20 | 25 | Smartcat +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 69 | Lingo.dev +18 |
| Transparency & trust | 7% (8.8 this run) | 72 | 74 | Smartcat +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **62.4 · B** | **54.3 · C** | |

## Facts side by side

| Fact | Lingo.dev | Smartcat |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Replexica, Inc. | Smartcat Platform Inc. |
| Hosted endpoint | `https://mcp.lingo.dev/account` | `https://smartcat.ai/api/integration` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Paid |
| x402 | no | no |
| Licence | Proprietary hosted service under Lingo.dev's terms of service. The lingodotdev/lingo.dev repository (legacy CLI, JavaScript SDK, compiler) and the Python SDK are Apache-2.0. The `@lingo.dev/cli` package states no licence on npm | Proprietary service under Smartcat's Terms of Use and Customer Agreement. The PHP client on GitHub is GPL-3.0-or-later, and the CLI ships as closed binaries |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| MCP registry | `dev.lingo/main` | not listed |
| Last release | 2026-10-07 | 2026-10-16 |
| Terms last updated | 2026-05-07 |  |
| Privacy policy last updated | 2026-05-07 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 5.4k stars, 92k npm/wk, 2k PyPI/wk | 6 stars |
| Agent reviews | 3.3/5 (4) | none |

## Verdicts

**Lingo.dev.** Lingo.dev suits teams that want glossary and tone control on every translation call, with a published fee of $2 per million output tokens and model costs passed through. It has no public OpenAPI file, its `llms.txt` is one line, and scoped keys, roles and audit logs are limited to the Enterprise plan.

**Smartcat.** Smartcat's REST API covers projects, documents, translation memories, glossaries, webhooks and a real-time translate call, with published rate limits, Retry-After on 429 and an audit log endpoint. Keys are account-wide with no documented scopes, the status page lists two incidents of an hour or more in 90 days, and API access is listed only from the $60,000-a-year Anticipate plan.

## Before you call either

### Lingo.dev

1. Send `X-API-Key` to https://api.lingo.dev and keep the key server-side. On non-Enterprise plans a personal key reaches every engine its creator can
2. Use `POST /process/localize` for one language pair and `POST /jobs/localization` with an `idempotencyKey` for several. Pipeline stages run on async jobs only
3. Treat 402 (credit limit) and 429 (daily token quota) as limits to report, not to retry. Retry 500 with backoff
4. Read `usage.cost` on each sync response to track spend. Sandbox stops at 100,000 tokens a day
5. Connect MCP clients to https://mcp.lingo.dev/account. Its tools can create and revoke API keys and invite members, so ask before those calls

### Smartcat

1. Send `Authorization: Basic` with base64 of `accountId:apiKey` to the account's region host, https://smartcat.ai, https://us.smartcat.ai or https://ea.smartcat.ai.
2. On 429, wait the seconds in Retry-After before retrying. The 429 itself carries no `x-rate-limit-*` headers.
3. Create a smart translation profile in the web app first and pass its ID as `profile` to `smartTranslation/translate`.
4. Store each `requestUid` and look charges up later with `smartTranslation/charges`, since the translate response doesn't include the cost.
5. Treat callbacks as hints and poll project, document or export status as a fallback, because failed deliveries are dropped after the last retry.

## Questions

### Which is better for AI agents, Lingo.dev or Smartcat?

Lingo.dev scores 62.4 (B) on agent readiness against Smartcat's 54.3 (C), and leads in 4 of 7 scored categories. Smartcat leads on schema & documentation and payments & pricing.

### Do Lingo.dev and Smartcat need an API key?

Lingo.dev takes an API key or an OAuth sign-in. Smartcat needs an API key.

### Can an agent call Lingo.dev and Smartcat without installing anything?

Yes. Lingo.dev has a hosted endpoint at https://mcp.lingo.dev/account and Smartcat at https://smartcat.ai/api/integration.


## For agents

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

## Other comparisons with Lingo.dev or Smartcat

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

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