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Genius vs Simkl

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

APIGeniusNEW—SimklNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedSimkl terms — user-contributed data
Free tierFree tier — API key requiredFree read routes; client_id for search
Rate limitUnpublished1 req/s documented
In directory since2026-07-052026-07-05
operationalpartialdownno data

Genius vs Simkl: common questions

Which is more reliable, Genius or Simkl?

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

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

Can I call Genius and Simkl from the browser?

Yes — both Genius and Simkl 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 Genius and Simkl free for commercial use?

Genius has unclear commercial terms, and Simkl 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.