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DKIM Validator vs LearnDMARC: catalog facts
DKIM Validator	LearnDMARC
Free Free to use.	Free Free to use; the site is sponsored by a DMARC monitoring service.
Web	Web
DKIM, SPF and SpamAssassin results in one place Tests real mail flow rather than just DNS records	Tests a real message sent from your own mail setup Step-by-step visual explanation of alignment
Test messages are stored on a third-party server Only checks messages you send to it	Full visual view needs a desktop screen Aimed at explaining one message rather than monitoring a domain
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.