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Openwhyd vs ReSmush.it

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

APIOpenwhydNEW—ReSmush.itNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedN/A — optimization service, not a dataset
Free tierFree — no key requiredFree; per-image size cap applies (see docs)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Openwhyd vs ReSmush.it: common questions

Which is more reliable, Openwhyd or ReSmush.it?

On our scheduled checks, ReSmush.it leads on measured uptime — Openwhyd at —% versus ReSmush.it 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 Openwhyd and ReSmush.it need an API key?

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

Can I call Openwhyd and ReSmush.it from the browser?

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

Are Openwhyd and ReSmush.it free for commercial use?

Openwhyd has unclear commercial terms, and ReSmush.it 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.