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Head to head · Translate text · October 2026 research run

Lingo.dev vs SYSTRAN Translate API

Lingo.dev scores 62.3 (B) 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.

Lingo.devReplexica, Inc. · HTTP API B62.3/100#341 of 722 SYSTRAN Translate APISYSTRAN (ChapsVision) · HTTP API E40/100#691 of 722

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 25
  • Schema & documentation, 54 against 42
  • Agent ergonomics, 75 against 54
  • Security & auth, 62 against 55
  • Maintenance & community, 87 against 4
  • Transparency & trust, 71 against 51

Watch for

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

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 20

Also in its favour

  • Free to start without a card

Watch for

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

Score by category

CategoryWeight this runLingo.devSYSTRAN Translate APIEdge
Reliability16%207125Lingo.dev +46
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25442Lingo.dev +12
Agent ergonomics13%16.27554Lingo.dev +21
Security & auth14%17.56255Lingo.dev +7
Payments & pricing10%12.52040SYSTRAN Translate API +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8874Lingo.dev +83
Transparency & trust7%8.87151Lingo.dev +20
Negative events≤1500
Total62.3 · B40 · E

Facts side by side

FactLingo.devSYSTRAN Translate API
KindHTTP APIHTTP API
VendorReplexica, Inc.SYSTRAN (ChapsVision)
Hosted endpointhttps://mcp.lingo.dev/accounthttps://api-translate.systran.net
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyOAuth or key
PricingPay per usePay per use
x402nono
LicenceProprietary 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 npmProprietary service under the SYSTRAN Translate PRO terms and conditions
Read-only variant documentednono
llms.txtnono
MCP registrydev.lingo/mainnot listed
Last release2026-10-072023-06-16
Terms last updated2026-05-07no date given
Privacy policy last updated2026-05-07no document linked
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularity5.4k stars, 92k npm/wk, 2k PyPI/wknone

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.

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

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

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, Lingo.dev or SYSTRAN Translate API?

Lingo.dev scores 62.3 (B) 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 Lingo.dev and SYSTRAN Translate API need an API key?

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

Can an agent call Lingo.dev and SYSTRAN Translate API without installing anything?

Yes. Lingo.dev has a hosted endpoint at https://mcp.lingo.dev/account and SYSTRAN Translate API at https://api-translate.systran.net.

Other comparisons with Lingo.dev or SYSTRAN Translate API

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