Bufferapp vs Guerrilla Mail
Same instrument, two spec sheets — measured, not claimed.
Bufferapp vs Guerrilla Mail: common questions
Which is more reliable, Bufferapp or Guerrilla Mail?
On our scheduled checks, Bufferapp leads on measured uptime — Bufferapp 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, Bufferapp or Guerrilla Mail?
Guerrilla Mail has the lower median latency in our checks — Bufferapp responds in 547 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 Bufferapp and Guerrilla Mail need an API key?
Guerrilla Mail needs no key, while Bufferapp requires a free API key. If you want to start calling without signup, reach for Guerrilla Mail first.
Can I call Bufferapp and Guerrilla Mail from the browser?
Only Guerrilla Mail is browser-friendly — it returns CORS headers over HTTPS. Bufferapp needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Bufferapp and Guerrilla Mail free for commercial use?
Bufferapp 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.