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Vaadin

Vaadin

Vaadin – Modern Java web UI framework

Vaadin is a free, open-source framework for Java and Kotlin that enables building rich, client-side web UIs with a server-driven model and high-level components.

Official Website

Category

Full-stack

First Release

2002

License

Apache License 2.0

Maintained By

TypeSafe (now Lightbend) / Vaadin team

Latest News

Vaadin 25.3 Migrates Browser Engine to TypeScript and Updates Observability

Vaadin 25.3 introduces a fundamental rewrite of its browser-side engine to TypeScript, switches to Micrometer for observability, and enhances UI testing rigor.

10/1/2026 • 0 likes

Difficulty

Intermediate 2/3

Moderate because it combines server-side Java with client-side web components and a rich UI toolkit, requiring familiarity with both server and client concepts.