SixMap

SixMap provides attack surface management built around large-scale, zero-touch computational mapping of the internet. Rather than requiring customers to manually inventory assets or install agents, the platform starts from just an organization’s name and works outward, scanning all 65,535 ports across both IPv4 and IPv6 address space to surface internet-facing assets, including shadow IT and unmanaged infrastructure that traditional asset-discovery tools and manually maintained CMDBs typically miss.

The company’s name is a reference to IPv6, and that dual-stack focus is a specific technical differentiator: many attack surface management tools built earlier in the category’s history focused primarily on IPv4 discovery, leaving a growing IPv6 blind spot as organizations adopt it. SixMap’s continuous monitoring model is aimed at closing that gap and at supporting continuous threat exposure management (CTEM) programs that need up-to-date visibility rather than periodic point-in-time scans.

Founded in 2020 and based in San Francisco, SixMap raised a $7 million round in April 2025 led by IAG Capital Partners with participation from TRE Advisors and returning investors DataTribe and California Innovation Fund, bringing its total disclosed funding to $23.5 million across four rounds. The company has also been awarded a Phase I Small Business Innovation Research (SBIR) contract from the US Air Force to extend its continuous threat exposure management capabilities, an independently competitive government validation point, and reports Fortune 500 companies and federal agencies among its customers.