OpenAI to buy Pierre, whose diff tools already run in Codex

OpenAI said on November 4 that it will acquire Pierre Computer Company, the startup whose Trees and Diffs libraries already handle file browsing and change review in the Codex app. Axios had the story first. Code Storage, Pierre’s Git-based service for storing code, stays open to its customers after the deal closes while OpenAI moves its features into Codex. Pierre’s open-source projects stay open-source, and OpenAI says it will keep contributing to them.

The deal hasn’t closed yet. It still needs customary closing conditions met, including regulatory approvals, and until then OpenAI and Pierre remain separate, independent companies. Financial terms were not disclosed.

What Pierre built

Pierre’s libraries cover the review side of Git. Trees lets a developer move quickly through a project’s files, and Diffs shows what changed. Diffs also has an Edit mode, so a reviewer can fix a line right where they spot the problem. Pierre’s most recent release is Highlights, a syntax highlighter that updates as a developer types or as an agent streams code. Code Storage is the infrastructure piece: an API that lets apps store code and track its history using Git.

The company is small. Jacob Thornton and Ian Ownbey founded it in 2023 and went through Y Combinator’s Winter 2023 batch, and the team numbers about ten people. Pierre has described its aim as rebuilding code hosting, code review and CI “from the metal, for the next generation of professional developers: Small, focused teams, working closely, augmented by AI.” Thornton co-created Bootstrap, according to Creative Conviction, and in a conversation the site recorded in August he described Pierre as building “the building blocks of the computers that agents will use to do work.”

OpenAI says it wants to adapt existing Git workflows to the way teams work with coding agents, covering everything “from the first branch an agent creates to that magic moment when code is deployed to the world.”

Why Axios sees a GitHub fight

Axios presents the deal as part of a wider challenge to Microsoft’s GitHub, which has had reliability problems and outages since AI coding took off. Critics quoted by the outlet say GitHub’s bigger problem is that it was built for humans, while so much code is now written by AI that an AI-first replacement would serve better. Others are already moving. Cursor, now owned by Elon Musk’s SpaceX, launched a GitHub rival called Origin in August, and former GitHub CEO Thomas Dohmke announced a competing product from his new coding startup in October. Microsoft owns nearly a quarter of OpenAI, though the two companies also compete in several areas.

The deal also fits with OpenAI’s own Git work. The same week, OpenAI described Pando, its in-house source control backend for engineers and agents. OpenAI says Pando cut the time needed to push code changes by nearly 80%, and the company is still only exploring ways to offer it to customers. Code Storage, by contrast, is a Git service that outside customers use today, which gives OpenAI a customer-facing product in the layer where Pando so far runs only internally.

OpenAI describes the end goal in its announcement: “We want Codex to connect the code a company ships with the decisions its people make, at the scale the future demands.”