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Poof vs ReSmush.it

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

APIPoofNEW—ReSmush.itNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedN/A — optimization service, not a dataset
Free tierFree tier — API key requiredFree; per-image size cap applies (see docs)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Poof vs ReSmush.it: common questions

Which is more reliable, Poof or ReSmush.it?

On our scheduled checks, ReSmush.it leads on measured uptime — Poof 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 Poof and ReSmush.it need an API key?

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

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

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

Are Poof and ReSmush.it free for commercial use?

Poof 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.