GrünstromIndex vs openSenseMap
Same instrument, two spec sheets — measured, not claimed.
GrünstromIndex vs openSenseMap: common questions
Which is more reliable, GrünstromIndex or openSenseMap?
On our scheduled checks, openSenseMap leads on measured uptime — GrünstromIndex at 73.5% 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, GrünstromIndex or openSenseMap?
openSenseMap has the lower median latency in our checks — GrünstromIndex responds in 1072 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 GrünstromIndex and openSenseMap need an API key?
Neither needs a paid key — GrünstromIndex 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 GrünstromIndex and openSenseMap from the browser?
Yes — both GrünstromIndex and openSenseMap 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 GrünstromIndex and openSenseMap free for commercial use?
GrünstromIndex 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.