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Genderize.io vs Icanhazip

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

APIGenderize.ioNEW—IcanhazipNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierKeyless usage limited (x-rate-limit-limit: 25 observed); 2,500 names/mo with a free keyFree — limits not published
Rate limitKeyless cap 25 per x-rate-limit-limit header; remaining/reset exposed in response headersUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Genderize.io vs Icanhazip: common questions

Which is more reliable, Genderize.io or Icanhazip?

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

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

Can I call Genderize.io and Icanhazip from the browser?

Yes — both Genderize.io and Icanhazip send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Genderize.io and Icanhazip free for commercial use?

Genderize.io has unclear commercial terms, and Icanhazip 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.