Replit

Replit has introduced Security Agent, an AI-powered tool that performs comprehensive security reviews of codebases in under an hour. The agent uses a hybrid approach combining LLMs with Semgrep and HoundDog.ai, and according to recent research can identify up to 93.3% of false positives from traditional static analysis tools.

Replit has released Agent 4, a major update that fundamentally restructures how product teams design, collaborate, and build. The release replaces Design Mode with an infinite Design Canvas, moves from fork-and-merge to shared real-time collaboration, and enables concurrent planning and execution.