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DFlight API vs openSenseMap

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

APIDFlight APIDEAD0openSenseMapHEALTHY84
Uptime · 30d
Uptime · 90d11.8%90.2%
Uptime · 30d0.0%90.0%
P50 · ms319655
P95 · ms6684139
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedOpen data (license set per senseBox; often public domain)
Free tierFree — limits not publishedFree (open-source citizen-science platform)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

DFlight API vs openSenseMap: common questions

Which is more reliable, DFlight API or openSenseMap?

On our scheduled checks, openSenseMap leads on measured uptime — DFlight API at 11.8% versus openSenseMap at 90.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, DFlight API or openSenseMap?

DFlight API has the lower median latency in our checks — DFlight API responds in 319 ms versus openSenseMap at 655 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do DFlight API and openSenseMap need an API key?

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

Can I call DFlight API and openSenseMap from the browser?

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

Are DFlight API and openSenseMap free for commercial use?

DFlight API has unclear commercial terms, and openSenseMap 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.