Valdi is a cross-platform UI framework that delivers native performance without sacrificing developer velocity.
Valdi addresses the tension between development speed and runtime performance in cross-platform mobile development. Rather than using web views or JavaScript bridges, it compiles declaratively written TypeScript components directly into platform-native views for iOS, Android, and macOS. The framework includes automatic view recycling through global pooling, optimized component rendering that updates independently without triggering parent re-renders, a C++ layout engine with minimal marshalling overhead, and viewport-aware rendering that inflates only visible views.
Valdi suits teams building production mobile applications where native performance matters and where the ability to write UI once across platforms accelerates development. The framework has been used extensively in Snap's production apps for eight years, though it remains in beta as the maintainers refine tooling and documentation for broader open source adoption. The project provides example applications covering minimal components, navigation patterns, state management, dynamic AI-driven UI, CLI applications, and performance benchmarks to help developers understand its capabilities.
The maintainers respond to issues and pull requests within a few days. Work in the issue tracker centers on enhancements, bug fixes, and documentation.
