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Sofiaplan vs Zenodo

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

APISofiaplanNEW—ZenodoNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublished30 req/window · 29 remaining · resets 1783516620
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sofiaplan vs Zenodo: common questions

Which is more reliable, Sofiaplan or Zenodo?

On our scheduled checks, Zenodo leads on measured uptime — Sofiaplan at —% versus Zenodo 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 Zenodo need an API key?

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

Can I call Sofiaplan and Zenodo from the browser?

Only Zenodo 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 Zenodo free for commercial use?

Sofiaplan has unclear commercial terms, and Zenodo 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.