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Fedora Messaging API vs Guerrilla Mail

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

APIFedora Messaging APIHEALTHY61Guerrilla MailHEALTHY96
Uptime · 30d
Uptime · 90d99.44%99.44%
Uptime · 30d100%100%
P50 · ms961185
P95 · ms49754899
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fedora Messaging API vs Guerrilla Mail: common questions

Which is more reliable, Fedora Messaging API or Guerrilla Mail?

Both are neck-and-neck — Fedora Messaging API and Guerrilla Mail each measure 99.44% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Fedora Messaging API or Guerrilla Mail?

Guerrilla Mail has the lower median latency in our checks — Fedora Messaging API responds in 961 ms versus Guerrilla Mail at 185 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 Fedora Messaging API and Guerrilla Mail need an API key?

Neither needs a paid key — Fedora Messaging 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 Fedora Messaging API and Guerrilla Mail from the browser?

Yes — both Fedora Messaging 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 Fedora Messaging API and Guerrilla Mail free for commercial use?

Fedora Messaging 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.