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Hunter vs Nationalize.io

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

APIHunterNEW—Nationalize.ioNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredKeyless usage limited (x-rate-limit-limit: 25 observed); 2,500 names/mo with a free key
Rate limitUnpublishedKeyless cap 25 per x-rate-limit-limit header; remaining/reset exposed in response headers
In directory since2026-07-052026-07-05
operationalpartialdownno data

Hunter vs Nationalize.io: common questions

Which is more reliable, Hunter or Nationalize.io?

On our scheduled checks, Nationalize.io leads on measured uptime — Hunter at —% versus Nationalize.io 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 Hunter and Nationalize.io need an API key?

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

Can I call Hunter and Nationalize.io from the browser?

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

Are Hunter and Nationalize.io free for commercial use?

Hunter has unclear commercial terms, and Nationalize.io 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.