Quant UX is a OpenSource research, usability and prototyping tool to quickly test your designs.

Warburg / Westphalia
Joined March 2016
Take full control of your layouts! You can now define individual track sizes for the grid widget — set custom height and width for each row and column separately. No more one-size-fits-all grids. quant-ux.com
1
68
I just shipped a local embedding model into the greq CLI. Point it at your files and run full semantic search, no vector DB, no server, just one shell command. So searching "Where is Karate from" surfaces related concepts like Japan or Judo too. github.com/KlausSchaefers/gr…
1
54
Figma's recent changes made open source design tools look better than ever. Penpot, OpenPencil, and Quant-UX have caught up on features and are a real Figma alternative in 2026. klausschaefers.substack.com/… #opensource
1
80
Quant-UX retweeted
Omarchy on Asahi creator lost access to his GitHub account two weeks ago due to some automated process flagging his account. Repo went offline and has been since. Not even me personally reaching out to GitHub twice has been able to restore his account. Terrifying. Embarrassing.
Replying to @maralcbr @dhh
Sadly, no. GitHub, like every other corporation, has too much red tape to get through. I’ve given up on them and now I’m migrating to Codeberg.
85
91
23
2,289
213,462
Quant-UX retweeted
I found a free, open-source Figma alternative — and kept finding reasons not to go back bit.ly/4eTECtA
1
2
28
3,698
Greq is a CLI tool that searches files and returns the most relevant sections. Greq applies lightweight linguistic ranking (BM25) to score and sort file sections. It behaves like a small search engine in your shell. github.com/KlausSchaefers/gr…
36
See the grid container in action! #OpenSource #design #Free
28
Open source ensures that designers are not locked into a single ecosystem, that data remains under the creator’s control, and that the future of design tooling is not dictated solely by the stock market. #design #ux #opensource medium.com/design-bootcamp/w…
39
Now there is a zoomable canvas in the Luisa-Agent. Who wants to contribute to the OpenSource #Lovable?
1
67
Still a long way to go...
20
We are starting a new project, called Luisa-Agent. It aims to build an open source alternative to Loveable and other "text-to-design" tools. The code is here: github.com/KlausSchaefers/lu… If you feel like contributing, please reach out!
71
i've written 70 articles about designing AI products over the past 2.5 years. have at 'em: lukew.com/ff?tag=ai%20design
13
18
1
173
24,792
🚀 Just published — Quant-UX: Design, prototype, and test user experiences with ease Quant-UX is an open-source tool for creating interactive prototypes, conducting user tests, and analyzing results to improve UX design. openalternative.co/quant-ux
1
4
176
The @karpathy interview 0:00:00 – AGI is still a decade away 0:30:33 – LLM cognitive deficits 0:40:53 – RL is terrible 0:50:26 – How do humans learn? 1:07:13 – AGI will blend into 2% GDP growth 1:18:24 – ASI 1:33:38 – Evolution of intelligence & culture 1:43:43 - Why self driving took so long 1:57:08 - Future of education Look up Dwarkesh Podcast on YouTube, Apple Podcasts, Spotify, etc. Enjoy!
535
2,856
941
18,418
10,786,386
We have introduced a new component, the "Grid Container". Define precise row and column structures, with automatic snapping of child elements to the grid layout. Now available in the component library. youtube.com/watch?v=NHTZf63r…
61
Designing just got smoother. Now when you drag elements into a Rectangle (Shortcut R), the paddings are automatically respected—no more manual nudging! Simply drop a Rectangle onto your canvas, set your desired paddings, and start dragging elements in.
2
7
247
We're excited to announce that Quant-UX now supports audio player elements in your prototypes! Whether you're designing a podcast app, a meditation experience, or anything that needs sound, you can now bring your ideas to life with built-in audio playback. Drag. Drop. Play.
1
1
126