Sofiaplan vs Spaceflight News
Same instrument, two spec sheets — measured, not claimed.
Sofiaplan vs Spaceflight News: common questions
Which is more reliable, Sofiaplan or Spaceflight News?
On our scheduled checks, Sofiaplan leads on measured uptime — Sofiaplan at 100% versus Spaceflight News at 95.1% 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, Sofiaplan or Spaceflight News?
Spaceflight News has the lower median latency in our checks — Sofiaplan responds in 1666 ms versus Spaceflight News at 864 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 Sofiaplan and Spaceflight News need an API key?
Neither needs a paid key — Sofiaplan is callable with no signup, and Spaceflight News is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Sofiaplan and Spaceflight News from the browser?
Only Spaceflight News is browser-friendly — it returns CORS headers over HTTPS. Sofiaplan needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Sofiaplan and Spaceflight News free for commercial use?
Sofiaplan has unclear commercial terms, and Spaceflight News 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.