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Sofiaplan vs Spaceflight News

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

APISofiaplanNEW—Spaceflight NewsNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (links/metadata for third-party news)
Free tierFree — limits not publishedFree — no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sofiaplan vs Spaceflight News: common questions

Which is more reliable, Sofiaplan or Spaceflight News?

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

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.