FinSignals API vs Guerrilla Mail
Same instrument, two spec sheets — measured, not claimed.
FinSignals API vs Guerrilla Mail: common questions
Which is more reliable, FinSignals API or Guerrilla Mail?
On our scheduled checks, FinSignals API leads on measured uptime — FinSignals API 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, FinSignals API or Guerrilla Mail?
Guerrilla Mail has the lower median latency in our checks — FinSignals API responds in 312 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 FinSignals API and Guerrilla Mail need an API key?
Neither needs a paid key — FinSignals API 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 FinSignals API and Guerrilla Mail from the browser?
Yes — both FinSignals API and Guerrilla Mail send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are FinSignals API and Guerrilla Mail free for commercial use?
FinSignals API 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.