From idea to (secure) app: Semgrep + Replit

Semgrep partners with Replit

Generative AI is enabling a new wave of creators, entrepreneurs, and teams to go from idea -> deployed in minutes. With platforms like Replit, anyone can prototype and ship software without leaving their browser.

Starting today, builders using Replit can turn on the new pre-deployment scanning feature, which lets Replit Agent run a Semgrep scan to automatically find security issues via a curated set of Python, Javascript, and Typescript rules.

With a single click, Replit Agent can fix the issues - from insecure code patterns to leaked secrets and outdated dependencies. Secure coding just became a background feature: no security expertise required, no context switching, just safer code with every deploy.

How it works

Before you deploy your app on Replit, you’ll now have the option to run a pre-deployment security scan, powered by Semgrep CE. Users will see a list of potential issues, which Replit Agent can fix with the click of a button:

Using Semgrep CE, Replit Agent is able to identify and fix vulnerabilities, exposed secrets, and outdated dependencies - all before code is built and deployed.

What’s under the hood?

We were impressed by how Replit Agent generates code using secure-by-default frameworks and libraries - it makes smart choices like using modern authentication patterns, safe database access methods, and well-maintained dependencies out of the box.

But even with a strong foundation, things slip through the cracks. That’s why real-time, intelligent scanning from Semgrep is essential. Replit runs a curated set of ~200 Semgrep Community rules tailored to the frameworks and languages used by Replit Agent:

• Python

• Javascript/Typescript

• Secrets scanning

If you're unfamiliar with Semgrep, our static analysis engine is fast, transparent, and extensible - meaning it's easy to integrate into LLM augmented workflows, and easy for LLMs to call and use dynamically as a tool (see our MCP server).

See it in action

Want to learn how to go from idea -> secure app in minutes? Join us for our upcoming webinar, "Vibe Coding, But Make it Safe," on May 22nd at 9 AM PT / 12 PM ET.

Discover how lightning fast scans, AI-powered fixes, and a harmonious workflow make for a magical experience.

Register Here to secure your spot.

Making it expensive to exploit software

At Semgrep, our mission is simple: make it prohibitively expensive for bad actors to exploit software.

With this partnership, we’re bringing this mission to life across the entire spectrum of builders - from individual developers launching their first app to security engineers overseeing complex, production-scale systems.

Whether you're experimenting in a personal workspace or managing security at an enterprise, Replit and Semgrep give you the tools to build fast and deploy safely.

Secure software shouldn’t be a luxury, it should be the default.