Once UI 2.0
Builds consistent React apps for developers and AI agents
Product HuntOpen SourceLaunched Sep 25, 202671#19 of the day
About Once UI 2.0
Once UI is an open-source design system for building polished React products with less repetitive code. Compose layouts with readable primitives, use a shared system of components and design tokens, and keep the result consistent as your product grows. Version 2.0 gives both you and your coding agent a clearer way to work. Its component catalog, compact rules, and task guides help agents use the system correctly; its foundations and predictable APIs make the output easier for you to understand.
The person behind Once UI 2.0
More Open Source launches
InyonAnswer your coding agents from your phoneOct 23, 2026 · 1 person
NanotypeA private online text editor with markdown. Open and type.Oct 23, 2026 · 1 person- Whiteboardthe open-source IDE for thoughtful software designOct 22, 2026 · 1 person
Tetriz Engg Intelligence + ConnectorsConnect coding sessions to PRs, issues, quality, and ROIOct 22, 2026 · 1 person
TessaryStop your agents from failing silently in productionOct 22, 2026 · 1 person
LLM Test ServerYour LLM tests, without the providerOct 22, 2026 · 1 person
Made Once UI 2.0? Ask us to remove this listing or your details.