Codemod turns messy, months-long migrations into safe, automated workflows.
TL;DR: Code modernization is one of the hardest, most expensive, and least tooled problems in software. Codemod turns months of risky migrations into predictable, automated workflows—blending open-source engines with an enterprise platform, built by a team that ran these programs at Meta, Brex, and Shopify. We’re thrilled to back Alex, Mo, and the Codemod team.
Upgrading frameworks, unifying design systems, adopting new APIs, enforcing security changes, or internationalizing products across dozens (or thousands) of repos is brutal. It’s even messier as AI-generated code increases entropy, drift grows, and “we’ll refactor later” piles up. In large organizations, the effort of simply coordinating these changes across multiple teams in itself is a challenge. When these issues do eventually get addressed (if ever), it means diverting non-negligible engineering bandwidth away from building new products for an extended period of time.
Companies need a safe, repeatable way to change code at scale with visibility, rollbacks, and measurable ROI.
Codemod is the enterprise code transformation platform. Teams can plan, automate, and orchestrate large-scale code changes from the CLI/IDE or web, with Insights dashboards for engineering leaders to track risk, impact, and progress. Powered by a modern, blazingly fast transformation engine (ast-grep), it supports 17+ programming languages and runs flexibly in CI, BYOC, or on-prem for compliance.
Codemod also maintains a Registry of community and pro codemods, making many upgrades “one click” instead of months of toil. A clear example: their React 19 migration recipe bundles codemods recognized by the React team, already with thousands of runs.
AI is accelerating how fast frameworks, APIs, and best practices evolve. The winners will be the teams who change their codebases safely and continuously, treating migrations as a product, not an ad-hoc hero project. Codemod’s combination of automation, visibility, and community makes that future practical.
At Propeller, we partner with the enabling layers of the AI era: infrastructure and developer platforms that multiply engineering output. Codemod fits perfectly. It cuts modernization costs, accelerates shipping, and makes change safe in the AI era—for both enterprises and startups. We’re proud to support a team turning a once-heroic internal practice (big-tech codemods) into a product any org can use.
If you’re an engineering leader or framework maintainer
Congratulations to Alex, Mo, and the Codemod community. We’re excited to build with you.