Bright Sky (DWD) vs Sunrise-Sunset
Same instrument, two spec sheets — measured, not claimed.
Bright Sky (DWD) vs Sunrise-Sunset: common questions
Which is more reliable, Bright Sky (DWD) or Sunrise-Sunset?
Both are neck-and-neck — Bright Sky (DWD) and Sunrise-Sunset each measure 99.02% 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.
Which is faster, Bright Sky (DWD) or Sunrise-Sunset?
Sunrise-Sunset has the lower median latency in our checks — Bright Sky (DWD) responds in 656 ms versus Sunrise-Sunset at 204 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 Bright Sky (DWD) and Sunrise-Sunset need an API key?
Neither needs a paid key — Bright Sky (DWD) is callable with no signup, and Sunrise-Sunset is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Bright Sky (DWD) and Sunrise-Sunset from the browser?
Yes — both Bright Sky (DWD) and Sunrise-Sunset 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 Bright Sky (DWD) and Sunrise-Sunset free for commercial use?
Bright Sky (DWD) has unclear commercial terms, and Sunrise-Sunset 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.