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OkSurf vs Sofiaplan

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

APIOkSurfNEW—SofiaplanNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OkSurf vs Sofiaplan: common questions

Which is more reliable, OkSurf or Sofiaplan?

On our scheduled checks, Sofiaplan leads on measured uptime — OkSurf at —% versus Sofiaplan at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do OkSurf and Sofiaplan need an API key?

Neither needs a paid key — OkSurf is callable with no signup, and Sofiaplan is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call OkSurf and Sofiaplan from the browser?

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

Are OkSurf and Sofiaplan free for commercial use?

OkSurf has unclear commercial terms, and Sofiaplan 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.