Halcyon UI

About

Every component ships as plain markup and Tailwind classes, no runtime, no context providers, no bundle cost. Keyboard behaviour and ARIA wiring are baked in and tested against screen readers.

Where Halcyon UI fits

Halcyon UI sits in the components corner of most stacks, and is aimed at teams who have outgrown doing this part by hand. It runs on Web, and is free to start with paid tiers for teams.

It is a closed-source product, so evaluate it the way you would any vendor you plan to build a workflow around.

What you get on day one

No JavaScript runtime required, and tested with voiceover, nvda and jaws, copy-paste markup, no install step, figma library included. The setup is deliberately small: the maker's argument is that a tool you have to schedule a migration for is a tool you will not adopt.

Whether that holds for your team depends on what you already run. The listing below and the feedback from other makers are the fastest way to find out.

What it does

• No JavaScript runtime required
• Tested with VoiceOver, NVDA and JAWS
• Copy-paste markup, no install step
• Figma library included

• Mara Ellis @maraellis · 2d

  Been using this on a 40-table schema all week. The rollback generation alone saved me twice. One request: a dry-run flag that prints the SQL without touching anything.

• Devin Roy @droy · 3d

  The plain-language summaries are the killer feature. My non-technical PM can review migrations now, which I did not expect to ever type.

• Sana Qureshi @sanaq · 4d

  Works well with Postgres. MySQL support felt a bit behind, the enum diffing missed a case for me. Filed an issue and got a response the same day.