WebSlurp vs Semgrep

WebSlurp

WebSlurp is a Chrome DevTools extension that captures HTTP and HTTPS requests from the page being inspected, lets you edit the method, URL parameters, headers and body, and replays them from a DevTools panel. It is a Manifest V3 extension installed by cloning the GitHub repository and loading it unpacked with Chrome developer mode enabled, so it runs locally with no proxy or certificate setup. Recent versions add an attack surface analysis that scores endpoints on authorization and business logic patterns.

Pros
  • Runs inside Chrome DevTools with no proxy, certificate or separate application to configure, per the project README
  • Source is public on GitHub and the repository shows active development, with 203 commits on main and a v1.9 release published on 1 August 2026
  • cURL and JSON export move captured requests into terminals, scripts or a later session
Things to check

    Pricing:

    Semgrep

    Semgrep is a fast, open-source static analysis engine that enables developers and security teams to write custom rules for finding bugs, enforcing coding standards, and detecting security vulnerabilities. Its pattern-matching syntax is designed to be intuitive for developers, reading like the code it matches. Semgrep's commercial platform (Semgrep AppSec Platform) adds managed rules, a web dashboard, SCA capabilities, and secrets detection, making it a comprehensive alternative for teams that value rule customizability and fast scan performance.

    Pros
    • Open-source core engine with no licensing costs for CLI usage
    • Custom rule authoring is significantly easier than any competing tool
    • Extremely fast scan performance suitable for every PR and commit
    • Developer-friendly syntax makes rules readable and maintainable
    • Growing community-contributed rule library covering common vulnerabilities
    Things to check
    • SCA capabilities are less mature than Snyk's established dependency scanning
    • No container image or IaC scanning capabilities
    • Commercial platform pricing approaches Snyk's per-developer costs
    • Inter-procedural and cross-file analysis is less deep than traditional SAST tools
    • Smaller vulnerability database compared to Snyk's proprietary research

    Pricing: Free open-source CLI + free cloud tier (up to 10 contributors/10 repos); Teams from $30/contributor/mo (Secrets $15); Enterprise custom

    Related

    Full Application Security guideWebSlurp AlternativesSemgrep AlternativesWebSlurp OverviewSemgrep Overview