Moderne is an enterprise developer-tools company that tackles technical debt and code modernization at industrial scale. Large organizations run thousands of repositories built over decades, and tasks like upgrading a framework, patching a widespread vulnerability, or migrating off a deprecated library become enormous, risky, manual undertakings. Moderne automates these mass-scale code transformations, applying changes consistently across an entire codebase rather than one repo at a time.
The company's technology stems from OpenRewrite, the open-source auto-refactoring project created by Moderne CEO and co-founder Jonathan Schneider while at Netflix. OpenRewrite uses lossless semantic trees to understand code structurally and apply precise, deterministic transformations — 'recipes' — that can be audited and reviewed. This determinism is a key differentiator: rather than probabilistic edits, Moderne produces predictable, verifiable changes, which matters enormously when modifying mission-critical enterprise software.
Moderne layers an enterprise platform on top of OpenRewrite that can run these recipes across thousands of repositories in parallel, search and analyze code at scale, and combine deterministic rewriting with AI to handle modernization work that previously consumed teams of engineers for months. OpenRewrite's reach is reflected in its integration into developer tools from major companies, including AWS's Amazon Q, Broadcom's App Advisor, and GitHub Copilot.
The company grew its customer base by 250% in 2024, attracting Fortune 500 organizations such as Allstate, Choice Hotels, and Walmart. Moderne closed a $30M Series B in February 2025 led by Acrew Capital, with participation from Morgan Stanley, Amex Ventures, TIAA Ventures, Intel Capital, and True Ventures. The funding fuels its mission to drive billions in enterprise modernization savings by making large-scale code transformation automatic, safe, and auditable.