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Fedora Messaging API vs Guerrilla Mail

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

APIFedora Messaging APINEW—Guerrilla MailNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
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?

On our scheduled checks, Guerrilla Mail leads on measured uptime — Fedora Messaging API at —% versus Guerrilla Mail at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

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.