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Free Dictionary API vs Gladia

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

APIFree Dictionary APIHEALTHY90GladiaHEALTHY76
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms6741203
P95 · ms21964121
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Dictionary API vs Gladia: common questions

Which is more reliable, Free Dictionary API or Gladia?

Both are neck-and-neck — Free Dictionary API and Gladia 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, Free Dictionary API or Gladia?

Free Dictionary API has the lower median latency in our checks — Free Dictionary API responds in 674 ms versus Gladia at 1203 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 Free Dictionary API and Gladia need an API key?

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

Can I call Free Dictionary API and Gladia from the browser?

Yes — both Free Dictionary API and Gladia send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Free Dictionary API and Gladia free for commercial use?

Free Dictionary API has unclear commercial terms, and Gladia 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.