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Helium vs Signaliz

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

APIHeliumNEW—SignalizNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFirst 50 queries per IP free, no key (paid API key beyond, ~$0.02/query)Free tier — API key required
Rate limit50 free queries per IP subnetUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Helium vs Signaliz: common questions

Which is more reliable, Helium or Signaliz?

On our scheduled checks, Signaliz leads on measured uptime — Helium at —% versus Signaliz 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 Helium and Signaliz need an API key?

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

Can I call Helium and Signaliz from the browser?

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

Are Helium and Signaliz free for commercial use?

Helium has unclear commercial terms, and Signaliz 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.