languagelayer vs SEO Score

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

Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms456634
P95 · ms8931704
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

languagelayer vs SEO Score: common questions

Which is more reliable, languagelayer or SEO Score?

Both are neck-and-neck — languagelayer and SEO Score 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 SEO Score?

languagelayer has the lower median latency in our checks — languagelayer responds in 456 ms versus SEO Score at 634 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 SEO Score need an API key?

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

Can I call languagelayer and SEO Score from the browser?

Neither sends browser-friendly CORS headers reliably, so call languagelayer and SEO Score from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are languagelayer and SEO Score free for commercial use?

languagelayer has unclear commercial terms, and SEO Score 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.