GuardDiff

GuardDiff is a web app (with GitHub/GitLab integrations) that reviews pull requests for secure-coding issues using a combination of traditional static rules and an AI assistant. Instead of flooding teams with generic findings, it focuses on “diff-aware” risk: only what changed, what new attack surface was introduced, and what exploit path is plausible. It comments directly on PRs with minimal, actionable guidance and safe code snippets, plus a short “why this is risky” explanation that developers can understand quickly. GuardDiff also enforces lightweight security gates (e.g., no new SQL injection sinks, no hardcoded secrets, no unsafe deserialization) and tracks trends per repo/team so security leads can see whether risk is going up or down. It’s designed for small-to-mid engineering orgs that can’t afford full AppSec staffing but still ship frequently.