verifier.org
our own free single-address checker
free, transparent, and fine for spot checks — but it does syntax, mx, disposable and domain-age checks, not smtp verification, so it can't replace anything above it on this list.
we run this one, so treat the placement accordingly — it sits at ten because that is roughly where its capability lands, and we would rather say so than leave it off the list.
it performs the checks that don't require touching a mail server: syntax, mx records, disposable-domain matching, role-account detection, free-provider detection, and domain age, then produces a confidence score from those signals.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- email verification tools
- pricing
- free
- website
- verifier.org
free, transparent, and fine for spot checks — but it does syntax, mx, disposable and domain-age checks, not smtp verification, so it can't replace anything above it on this list.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.