Best Software for Managing External Attack Surfaces in 2024 | UpGuard

**Executive Summary:** This document defines attack surface management (ASM), discusses its importance and implementation challenges, and presents a 2026 buyer's guide comparing the top 10 ASM solutions (UpGuard, Bitsight, Panorays, SecurityScorecard, ProcessUnity, OneTrust Vendorpedia, RiskRecon, Recorded Future, Digital Shadows/ReliaQuest, and CybelAngel), summarizing their key features, target customers, pricing approaches, strengths/weaknesses, and customer case studies demonstrating asset discovery, continuous monitoring, vendor risk management, and attack surface reduction.