ITIS vs Satellite Passes
Same instrument, two spec sheets — measured, not claimed.
ITIS vs Satellite Passes: common questions
Which is more reliable, ITIS or Satellite Passes?
On our scheduled checks, Satellite Passes leads on measured uptime — ITIS at 97.1% versus Satellite Passes at 99.02% 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, ITIS or Satellite Passes?
Satellite Passes has the lower median latency in our checks — ITIS responds in 1767 ms versus Satellite Passes at 976 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 ITIS and Satellite Passes need an API key?
Neither needs a paid key — ITIS is callable with no signup, and Satellite Passes is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call ITIS and Satellite Passes from the browser?
Only Satellite Passes is browser-friendly — it returns CORS headers over HTTPS. ITIS needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are ITIS and Satellite Passes free for commercial use?
ITIS has unclear commercial terms, and Satellite Passes 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.