Sofiaplan vs The Guardian

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

Uptime · 30d
Uptime · 90d100%50.6%
Uptime · 30d100%0.0%
P50 · ms861517
P95 · ms29032726
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree developer key — registration required
Rate limitUnpublished5000 calls/day (developer tier)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sofiaplan vs The Guardian: common questions

Which is more reliable, Sofiaplan or The Guardian?

On our scheduled checks, Sofiaplan leads on measured uptime — Sofiaplan at 100% versus The Guardian at 50.6% 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 The Guardian?

The Guardian has the lower median latency in our checks — Sofiaplan responds in 861 ms versus The Guardian at 517 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 The Guardian need an API key?

Sofiaplan needs no key, while The Guardian requires a free API key. If you want to start calling without signup, reach for Sofiaplan first.

Can I call Sofiaplan and The Guardian from the browser?

Neither sends browser-friendly CORS headers reliably, so call Sofiaplan and The Guardian from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Sofiaplan and The Guardian free for commercial use?

Sofiaplan has unclear commercial terms, and The Guardian 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.