altdns vs Attaxion: Side-by-Side Comparison (2026)

altdns: A tool for generating permutations, alterations and mutations of subdomains and resolving them..

Attaxion: Agentless EASM platform for asset discovery, exposure mgmt & risk reduction. built by Attaxion. Core capabilities include Agentless external asset discovery, Continuous exposure monitoring and risk prioritization, Automated web application security testing..

Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.

altdns is open-source with 2,439 GitHub stars. Attaxion is developed by Attaxion. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

altdns and Attaxion serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover Reconnaissance. Key differences: altdns is Free while Attaxion is Commercial, altdns is open-source. Review the feature comparison above to determine which fits your requirements.