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GraphHopper vs OpenSky Network

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

APIGraphHopperDEAD0OpenSky NetworkDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearno
Data licenseUnverifiedNon-commercial/research use per OpenSky terms
Free tierFree tier — API key requiredFree for non-commercial/research use; anonymous requests are rate-limited and time-coarsened
Rate limitUnpublishedAnonymous access throttled; registered/OAuth users get higher limits
In directory since2026-07-052026-07-05
operationalpartialdownno data

GraphHopper vs OpenSky Network: common questions

Which is more reliable, GraphHopper or OpenSky Network?

Both are neck-and-neck — GraphHopper and OpenSky Network each measure 0.0% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Do GraphHopper and OpenSky Network need an API key?

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

Can I call GraphHopper and OpenSky Network from the browser?

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

Are GraphHopper and OpenSky Network free for commercial use?

GraphHopper has unclear commercial terms, and OpenSky Network is personal/non-commercial only. 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.