External attack surface management (EASM) helps security and risk pros better assess third parties and M&A targets, uncover and reduce cloud sprawl, and bring IT and security into agreement about risk prioritization. But to realize these benefits, you’ll first have to select from a diverse set of vendors that vary by size, type of offering, geography, and use case differentiation. Security professionals should use this report to understand the value they can expect from an external attack surface management vendor, learn how vendors differ, and select one based on size and market focus.