"At Brex, we’ve always believed that engineers are most productive when they have the freedom to choose the tools that work best for them. We’ve built our dev environment to support that, from flexible editor configs to a broad range of agentic coding tools. Rather than pick a single winner, we make every option available and let engineers decide.

Cursor has become the clear standout. More than 70% of our engineers now use it, and they’re doing far more than just using autocomplete; over 45% of our code changes are now fully written by AI.

We’ve seen meaningful gains in day-to-day development, faster execution on large-scale migrations, increased rate of debugging, and even faster onboarding. It’s shifted how we collaborate, and it’s starting to shape how we think about codebase design itself."