Church Calendar vs Guerrilla Mail
Same instrument, two spec sheets — measured, not claimed.
Church Calendar vs Guerrilla Mail: common questions
Which is more reliable, Church Calendar or Guerrilla Mail?
On our scheduled checks, Church Calendar leads on measured uptime — Church Calendar at 100% versus Guerrilla Mail 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, Church Calendar or Guerrilla Mail?
Guerrilla Mail has the lower median latency in our checks — Church Calendar responds in 848 ms versus Guerrilla Mail at 298 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 Church Calendar and Guerrilla Mail need an API key?
Neither needs a paid key — Church Calendar is callable with no signup, and Guerrilla Mail is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Church Calendar and Guerrilla Mail from the browser?
Only Guerrilla Mail is browser-friendly — it returns CORS headers over HTTPS. Church Calendar needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Church Calendar and Guerrilla Mail free for commercial use?
Church Calendar has unclear commercial terms, and Guerrilla Mail 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.