mailspoof vs Red Sift OnDMARC: Side-by-Side Comparison (2026)

mailspoof: A command-line tool that analyzes SPF and DMARC records to identify domains vulnerable to email spoofing attacks..

Red Sift OnDMARC: Email authentication platform implementing DMARC, SPF, DKIM, and BIMI protocols. built by Red Sift. Core capabilities include DMARC policy implementation and enforcement, SPF and DKIM authentication management, Email sender identification and authentication..

Both serve the Email Security Platforms market but differ in approach, feature depth, and target audience.

mailspoof is open-source with 131 GitHub stars. Red Sift OnDMARC is developed by Red Sift. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

mailspoof and Red Sift OnDMARC serve similar Email Security Platforms use cases: both are Email Security Platforms tools, both cover DMARC, SPF. Key differences: mailspoof is Free while Red Sift OnDMARC is Commercial, mailspoof is open-source. Review the feature comparison above to determine which fits your requirements.