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mail.tm vs Nexmo API

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

APImail.tmHEALTHY82Nexmo APIHEALTHY93
Uptime · 30d
Uptime · 90d84.3%100%
Uptime · 30d75.0%100%
P50 · ms709567
P95 · ms23511221
AuthnoneapiKey
CORSnono
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 Nexmo API: common questions

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

On our scheduled checks, Nexmo API leads on measured uptime — mail.tm at 84.3% versus Nexmo API at 100% 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, mail.tm or Nexmo API?

Nexmo API has the lower median latency in our checks — mail.tm responds in 709 ms versus Nexmo API at 567 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 mail.tm and Nexmo API need an API key?

mail.tm needs no key, while 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 Nexmo API from the browser?

Neither sends browser-friendly CORS headers reliably, so call mail.tm and Nexmo API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

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

mail.tm 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.