What is the Replit Security Agent?

The Replit Security Agent is a specialized AI tool designed to perform comprehensive security audits of applications. It maps your project architecture, builds a custom threat model, and identifies vulnerabilities like SQL injection or cross-site scripting. Unlike standard background scanning, this agent performs a deep-dive review to ensure your code is production-ready before you publish.

How does the Replit Security Agent work?

The agent uses a hybrid approach that combines the deterministic program analysis of Semgrep and HoundDog.ai with the contextual reasoning of large language models. This combination allows the system to verify if a vulnerability is actually exploitable in production, which helps reduce the number of false positive alerts by approximately 90 percent compared to traditional static analysis tools.

How much does the Replit Security Agent cost?

Replit is currently offering five dollars in credits for a limited time to allow users to try the Security Agent. While specific long-term pricing for individual scans is not detailed in the announcement, the tool is accessible through the Security panel of your project. Users are encouraged to run a scan whenever they publish major changes to their applications.

How long does a Replit Security Agent scan take?

For larger projects, a deep security audit by the agent can take up to 15 minutes to complete. This duration ensures a thorough assessment across a wide range of potential threats, including API route analysis and dependency auditing. Once the scan is finished, the agent generates a detailed report of identified risks for your review.

How does the Security Agent handle identified vulnerabilities?

After identifying risks, the Security Agent organizes them into separate tasks that can be resolved in parallel. You can pass these approved issues to the main Replit Agent for remediation. Once the agent applies the fixes to your project main branch, you must republish your application to ensure the production environment is fully secured and updated.

Replit Launches Security Agent to Perform Deep Code Audits in Minutes

Agentic Coding

AI Safety

AI Agent

Published Apr 21, 2026

Replit, a collaborative development platform, introduced the Security Agent, a specialized AI agent that performs deep-dive security audits of full codebases in under 15 minutes. It uses a hybrid approach combining the precision of Semgrep and HoundDog.ai with LLM reasoning to identify vulnerabilities while verifying if they are actually exploitable.

This update extends the agentic coding capabilities introduced last month by addressing the security debt of rapid builds. By automating security engineering and reducing false positives by 90%, it allows teams to maintain high shipping velocity without sacrificing the safety of their production environments.

Trigger a scan from the project Security panel by selecting "Run Scan with Agent." Once complete, the Security Agent organizes risks into parallel tasks for the main Replit Agent to fix in the background. For a limited time, users receive $5 in credits to test the workflow.

Read the full update →

Frequently asked questions

What is the Replit Security Agent?: The Replit Security Agent is a specialized AI tool designed to perform comprehensive security audits of applications. It maps your project architecture, builds a custom threat model, and identifies vulnerabilities like SQL injection or cross-site scripting. Unlike standard background scanning, this agent performs a deep-dive review to ensure your code is production-ready before you publish.
How does the Replit Security Agent work?: The agent uses a hybrid approach that combines the deterministic program analysis of Semgrep and HoundDog.ai with the contextual reasoning of large language models. This combination allows the system to verify if a vulnerability is actually exploitable in production, which helps reduce the number of false positive alerts by approximately 90 percent compared to traditional static analysis tools.
How much does the Replit Security Agent cost?: Replit is currently offering five dollars in credits for a limited time to allow users to try the Security Agent. While specific long-term pricing for individual scans is not detailed in the announcement, the tool is accessible through the Security panel of your project. Users are encouraged to run a scan whenever they publish major changes to their applications.
How long does a Replit Security Agent scan take?: For larger projects, a deep security audit by the agent can take up to 15 minutes to complete. This duration ensures a thorough assessment across a wide range of potential threats, including API route analysis and dependency auditing. Once the scan is finished, the agent generates a detailed report of identified risks for your review.
How does the Security Agent handle identified vulnerabilities?: After identifying risks, the Security Agent organizes them into separate tasks that can be resolved in parallel. You can pass these approved issues to the main Replit Agent for remediation. Once the agent applies the fixes to your project main branch, you must republish your application to ensure the production environment is fully secured and updated.

Frequently asked questions

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