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mail.tm vs Vonage (Nexmo) API

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

APImail.tmNEW—Vonage (Nexmo) APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — temporary mailboxesFree tier — API key required
Rate limitRate limited (429 on exceed); exact policy per docs.mail.tm10, 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

mail.tm vs Vonage (Nexmo) API: common questions

Which is more reliable, mail.tm or Vonage (Nexmo) API?

On our scheduled checks, Vonage (Nexmo) API leads on measured uptime — mail.tm at —% versus Vonage (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 mail.tm and Vonage (Nexmo) API need an API key?

mail.tm needs no key, while Vonage (Nexmo) API requires a free API key. If you want to start calling without signup, reach for mail.tm first.

Can I call mail.tm and Vonage (Nexmo) API from the browser?

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

Are mail.tm and Vonage (Nexmo) API free for commercial use?

mail.tm has unclear commercial terms, and Vonage (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.