Greptile is an AI code review company that builds agents which read a pull request against the full context of a codebase - not just the diff. It indexes a repository into a graph of files, functions and dependencies, then runs parallel agents to catch bugs, anti-patterns and security risks, leaving inline comments and PR summaries. Founded in 2023 by three Georgia Tech alumni and backed by Y Combinator, Initialized Capital and Benchmark, Greptile has reviewed over a billion lines of code for teams including Brex, Substack and Retool.
Macroscope is a San Francisco AI startup that turns sprawling codebases into legible, reviewable work. Founded in 2023 by Periscope alums Kayvon Beykpour and Joe Bernstein with Magic Pony co-founder Rob Bishop, it sits between engineers and managers - reviewing pull requests, catching bugs, and summarizing what an engineering org actually shipped, without anyone having to attend another status meeting.
Bito is a San Francisco-based AI developer tools company building agents that review pull requests and ground code generation in deep codebase context. Its AI Code Review agent plugs into GitHub, GitLab, and Bitbucket to flag bugs, security issues, and style problems before humans burn a single brain cell on them - and it speeds up PR merges by 89%, according to the company.