Email and collaboration security

Email authentication and DMARC

Services that deploy and monitor SPF, DKIM, DMARC and BIMI to stop others sending mail as an organization's domains.

4 vendors · alphabetical, never ranked

• dmarciandmarcian sells a hosted platform that monitors SPF, DKIM, and DMARC records for an organization's sending domains, along with deployment services that manage DMARC rollout for customers.Privately held · primary category
• MimecastMimecast sells email security, security awareness training, data loss and insider risk protection, email authentication and collaboration security products, along with an email archiving service for compliance.Owned by Permira since 2022
• Red SiftRed Sift sells a security platform built around DMARC, SPF, and DKIM email authentication, with added modules for TLS certificate monitoring, brand and domain impersonation detection, and external attack surface discovery.Privately held · primary category
• ValimailValimail sells email authentication software delivered as a service, including a free tool that monitors DMARC enforcement status and a paid tool that automates SPF, DKIM, and DMARC setup and policy enforcement.Owned by DigiCert since 2025 · primary category

No vendor pays to be listed or to change what we write. Descriptions are ours, drawn from each company's own site and filings. Corrections: /corrections.