Mailcut verifies email lists and single addresses with credit packs: 1 credit per address, valid 12 months, no monthly fee. Bulk upload and API included.
Mailbite verifies email addresses in bulk or through an API: syntax, domain, MX, SMTP mailbox checks and disposable-address detection. Monthly plans from $19.90 (25,000 verifications) plus 100 free verifications every month.
