MailboxValidator Free Email Checker vs What The Commit
Same instrument, two spec sheets — measured, not claimed.
MailboxValidator Free Email Checker vs What The Commit: common questions
Which is more reliable, MailboxValidator Free Email Checker or What The Commit?
On our scheduled checks, What The Commit leads on measured uptime — MailboxValidator Free Email Checker at —% versus What The Commit 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 MailboxValidator Free Email Checker and What The Commit need an API key?
What The Commit needs no key, while MailboxValidator Free Email Checker requires a free API key. If you want to start calling without signup, reach for What The Commit first.
Can I call MailboxValidator Free Email Checker and What The Commit from the browser?
Neither sends browser-friendly CORS headers reliably, so call MailboxValidator Free Email Checker and What The Commit from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are MailboxValidator Free Email Checker and What The Commit free for commercial use?
MailboxValidator Free Email Checker has unclear commercial terms, and What The Commit 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.