How to Set Up Semgrep in 2026 - Complete Installation and Configuration Guide

Why Semgrep and why now Semgrep is a fast, open-source static analysis tool that finds bugs and security vulnerabilities by letting you write rules that look like the code you are searching for. Unlike legacy SAST tools that require specialized security expertise to configure and produce overwhelming false positive rates, Semgrep was designed from the ground up for developers. Its pattern syntax mirrors your actual source code, its CLI runs in seconds, and its rule library covers over 30 programming languages with thousands of pre-written checks. Since its launch by r2c (now Semgrep, Inc.) in 2020, Semgrep has become the default security scanner for thousands of engineering teams - from startups running the free open-source engine to enterprises using the full cloud platform. Dropbox, Figma, Snowflake, and Hashicorp all use Semgrep in their development pipelines. The tool scans over 100 million lines of code daily across its user base. The reason to set up Semgrep now is straightforwar