Feature set
OnDMARC is a robust, feature-rich DMARC reporting and management platform. It offers extensive DMARC report analysis, detailed source detection, and sophisticated spoof detection capabilities. A key strength is its 'Dynamic Services' feature, which helps manage SPF, DKIM, and DMARC records, including SPF flattening to overcome the 10-lookup limit.
Beyond core DMARC, OnDMARC provides advanced tools like forensic reporting, an API for integration, smart alerts, and an 'Event Hub' for streaming security logs to SIEM systems. It also supports BIMI, MTA-STS, TLS-RPT, and includes brand protection features such as 'Radar' and 'DNS Guardian' for blocklist (or blacklist) and reputation monitoring. This makes it a comprehensive suite for email security.
DMARC-SRG, as an open-source PHP tool, focuses on the fundamental aspects of DMARC report parsing, viewing, and summary generation. It provides basic DMARC report analysis, allowing users to see aggregate data and identify sending sources based on the XML reports. The core functionality revolves around processing the raw DMARC data into a more readable format.
Due to its open-source nature, DMARC-SRG lacks many of the advanced features found in commercial solutions. It does not offer proactive spoof detection beyond what's inherent in DMARC reports, nor does it include SPF flattening, hosted DMARC, BIMI support, or blocklist monitoring. Its feature set is primarily a foundational DMARC report viewer rather than a comprehensive email security platform.