Show HN: I left Figma to build a diffusion-based UI design tool

jjcm 18 points 7 comments July 21, 2026
diffui.ai · View on Hacker News

Hey hn, this has been something I've been working on for the last few months and is finally robust enough to really show off. I've been pretty tired with the design outputs of LLMs for a while, and I've always thought diffusion offered much more creative / on brand design outputs, even before they were able to render text. I had enough conviction for this to leave my role over at Figma to build Diffui. The goal is to allow for you to design your full web app as quickly as possible, in a figma-like interface, and then hand that off to an agent to build. The page shows some interactive examples. Happy to be an open book here and chat about the approach, the process, etc!

Discussion Highlights (5 comments)

dbreunig

I got an early tip on this and used it to build a brand mood board and it crushed previous attempts with Claude. Highly recommend.

grahac

The Tarot card example on here is so sick.

lurkyniko

I had this redesign my new landing page. Excited to see how this develops

cacio-e-pepe

Okay so the diffusion model generates image assets, and you iterate on those, and then another model turns your favorites into code, is that right?

capnjngl

Something that's not mentioned here is that for design agencies who work as multiple clients, the app has the ability to save and work with multiple brand profiles. You can upload a bunch of screenshots of examples of the brand's design language - from their app or website or ads or whatever - and have Diffui make a brand guide just based on that, and then any future designs are influenced by that brand guide. Pretty neat little trick.

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