Semgrep Guardian: Security for AI-Generated Code

Two years ago, a human wrote every line of code that went into production. Today, that's no longer true.

Two shifts are reshaping the industry:

Traditional engineers are writing more software than ever before, powered by AI agents, and reviewing far less of it.

Citizen developers, people who have never written code before, are now pushing production software connected to customer data every single day.

The result: the volume of unreviewed code is skyrocketing. In addition, frontier models are accelerating the discovery and exploitation of software vulnerabilities, compressing the window between disclosure and attack. Across the industry, AppSec teams are seeing 10x the vulnerabilities they were two years ago.

On top of this, our traditional gates are breaking down. Human review is finite, and most tooling runs in CI/CD after code is already written, which is too late. Using models alone to check themselves is too slow, and too expensive to work at scale.

The industry desperately needs a solution that moves away from noisy findings and toward real security outcomes.

What is Semgrep Guardian?

Semgrep is the code security platform trusted by hundreds of the world's best security teams, including Notion, Snowflake, and Dropbox. Guardian is Semgrep's solution for agentic code security, purpose-built to scan and fix AI-generated code the moment it's written.

Guardian lives in your IDE, detecting and fixing the vulnerabilities, malicious packages, and hardcoded secrets your agent introduces. We're an official partner of Cursor and Claude Code, and work wherever an MCP server is supported, including out-of-the-box integrations for GitHub Copilot, VS Code, Windsurf, Amazon Kiro, and many others. Guardian comes bundled with an MCP server, Hooks integrations, and Skills. Together, they ensure Semgrep is always available to the agent at exactly the right moment. When an agent catches and resolves a vulnerability at the moment it's written, it happens faster and cheaper than finding it downstream.

Here's what's possible on day one:

Scan everything, automatically. Prevent your agent from introducing the vulnerabilities that matter most: OWASP Top 10 issues, malicious open source packages, and hardcoded secrets. Every file an agent touches is scanned automatically, powered by Semgrep's multimodal engine across Code, Supply Chain, and Secrets.

Complete visibility. Your security team gets a complete picture of what's happening across your engineering org. Track how many issues agents introduced, how many were caught and fixed automatically, which IDEs and agents your team is using, and the overall ROI of your program.

Deploy in an afternoon. Easily roll out to hundreds of developers without any software installed on their machines. Use your MDM or your agent's built-in enterprise controls to get everyone running with security guardrails from day one.

Semgrep Guardian is an always-on security layer that developers rarely think about, and security teams can trust.

The cheapest vulnerability is the one your agent never ships

Across our customer base, Guardian runs over 3 million scans every week, with 95% completing in under 5 seconds. It’s fast enough to run inline, without slowing anyone down.

One B2B SaaS company rolled out Guardian across their engineering team and now has full visibility into every line of code their agents write. Since deploying, they prevent over 180 critical issues every week, issues that would have otherwise gone undetected until much later in the process, when they're significantly more expensive and time-consuming to fix.

Try Semgrep Guardian today

Install Guardian now for free, or watch a 60-second video to see it in action.