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HelloSalut vs IsItWater

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

APIHelloSalutHEALTHY77IsItWaterDEAD0
Uptime · 30d
Uptime · 90d95.1%0.0%
Uptime · 30d95.0%0.0%
P50 · ms2362—
P95 · ms4778—
AuthnoneapiKey
CORSyesno
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

HelloSalut vs IsItWater: common questions

Which is more reliable, HelloSalut or IsItWater?

On our scheduled checks, HelloSalut leads on measured uptime — HelloSalut at 95.1% versus IsItWater at 0.0% 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 HelloSalut and IsItWater need an API key?

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

Can I call HelloSalut and IsItWater from the browser?

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

Are HelloSalut and IsItWater free for commercial use?

HelloSalut has unclear commercial terms, and IsItWater 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.