Tenable Nessus vs. Semgrep

Built for security practitioners, by security professionals, Nessus products by Tenable are the de-facto industry standard for vulnerability assessment. Nessus performs point-in-time assessments to help security professionals quickly and easily identify and fix vulnerabilities, including software flaws, missing patches, malware, and misconfigurations - across a variety of operating systems, devices, and applications.

Semgrep is a modern static analysis (SAST), software composition analysis (SCA), and secrets detection platform designed for both developers and security teams. It combines fast, deterministic analysis with context-aware AI that triages findings like a senior security engineer. The AI Assistant helps reduce false positives, prioritize meaningful results, and offers clear remediation guidance. Its “Memories” feature learns from past decisions to further reduce triage noise over time.