mail.tm vs mailboxlayer
Same instrument, two spec sheets — measured, not claimed.
mail.tm vs mailboxlayer: common questions
Which is more reliable, mail.tm or mailboxlayer?
On our scheduled checks, mailboxlayer leads on measured uptime — mail.tm at 84.3% versus mailboxlayer 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 mailboxlayer?
mailboxlayer has the lower median latency in our checks — mail.tm responds in 709 ms versus mailboxlayer at 316 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 mailboxlayer need an API key?
mail.tm needs no key, while mailboxlayer requires a free API key. If you want to start calling without signup, reach for mail.tm first.
Can I call mail.tm and mailboxlayer from the browser?
Neither sends browser-friendly CORS headers reliably, so call mail.tm and mailboxlayer 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 mailboxlayer free for commercial use?
mail.tm has unclear commercial terms, and mailboxlayer 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.