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LibreTranslate vs User Agent Lookup API

Same instrument, two spec sheets — measured, not claimed.

APILibreTranslateHEALTHY92User Agent Lookup APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms619426
P95 · ms1474764
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (software is AGPL-3.0)Unverified
Free tierFree — /languages is keyless; hosted /translate may require a key or donationFree — limits not published
Rate limitUnpublished (per hosted instance)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

LibreTranslate vs User Agent Lookup API: common questions

Which is more reliable, LibreTranslate or User Agent Lookup API?

Both are neck-and-neck — LibreTranslate and User Agent Lookup API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, LibreTranslate or User Agent Lookup API?

User Agent Lookup API has the lower median latency in our checks — LibreTranslate responds in 619 ms versus User Agent Lookup API at 426 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do LibreTranslate and User Agent Lookup API need an API key?

Neither needs a paid key — LibreTranslate is callable with no signup, and User Agent Lookup API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call LibreTranslate and User Agent Lookup API from the browser?

Only LibreTranslate is browser-friendly — it returns CORS headers over HTTPS. User Agent Lookup API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are LibreTranslate and User Agent Lookup API free for commercial use?

LibreTranslate has unclear commercial terms, and User Agent Lookup API has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.