Halo Security Attack Surface Discovery vs SurfaceDiff: side-by-side comparison (2026)

Halo Security Attack Surface Discovery: Discovers and inventories internet-facing assets including subdomains, IPs, and apps. Built by Halo Security.

SurfaceDiff: Continuous external attack surface monitoring that shows what changed between scans. Built by SurfaceDiff.

The table above shows where their features, integrations, deployment and company size fit differ.

Halo Security Attack Surface Discovery is made by Halo Security. SurfaceDiff is made by SurfaceDiff. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Halo Security Attack Surface Discovery and SurfaceDiff are both External Attack Surface Management products, and both cover Port Scanning, Subdomain Enumeration, Network Scanning. Use the table above to see where features, deployment and company size fit differ.