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Guerrilla Mail vs Nexmo API

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

APIGuerrilla MailNEW—Nexmo APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublished10, 120;w=60;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-120-rpm|remote_address", 10;w=1;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-10-rps|remote_address" req/window · 9 remaining · resets 1
In directory since2026-07-052026-07-05
operationalpartialdownno data

Guerrilla Mail vs Nexmo API: common questions

Which is more reliable, Guerrilla Mail or Nexmo API?

On our scheduled checks, Nexmo API leads on measured uptime — Guerrilla Mail at —% versus Nexmo API 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 Guerrilla Mail and Nexmo API need an API key?

Guerrilla Mail needs no key, while Nexmo API requires a free API key. If you want to start calling without signup, reach for Guerrilla Mail first.

Can I call Guerrilla Mail and Nexmo API from the browser?

Only Guerrilla Mail is browser-friendly — it returns CORS headers over HTTPS. Nexmo API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Guerrilla Mail and Nexmo API free for commercial use?

Guerrilla Mail has unclear commercial terms, and Nexmo API 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.