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languagelayer vs Poptin API

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

APIlanguagelayerHEALTHY96Poptin APIREACHABLE100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms293698
P95 · ms8931705
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limitUnpublished120 req/window · 119 remaining
In directory since2026-07-052026-10-04
operationalpartialdownno data

languagelayer vs Poptin API: common questions

Which is more reliable, languagelayer or Poptin API?

Both are neck-and-neck — languagelayer and Poptin 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, languagelayer or Poptin API?

languagelayer has the lower median latency in our checks — languagelayer responds in 293 ms versus Poptin API at 698 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 languagelayer and Poptin API need an API key?

languagelayer needs no key, while Poptin API requires a free API key. If you want to start calling without signup, reach for languagelayer first.

Can I call languagelayer and Poptin API from the browser?

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

Are languagelayer and Poptin API free for commercial use?

languagelayer has unclear commercial terms, and Poptin 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.