Quick Overview
| Company | None (individual maker) |
|---|---|
| Category | UX Research Tools |
| Headquarters | Warburg, Germany |
| Founded | 2019 |
| EU Presence | EU (Germany) — maintainer address published directly |
| Data Location | Self-hostable; SaaS hosting region not independently confirmed |
| Open Source | Yes, GNU GPL-3.0 |
| Compliance | Not independently verified for the hosted SaaS version |
| Pricing | Free |
| Free Option | Fully free, unlimited prototypes and tests |
| Replaces | Figma (prototyping/testing features) |
Detailed Review
Quant-UX is what you get when a UX researcher who also writes software decides the usability-testing tools on the market are too expensive and too closed. Klaus Schaefers, based in Warburg, Germany, publishes his name, role and postal address directly on the tool's own contact page — a level of transparency most funded startups don't bother with, because most funded startups have a legal department that would rather they didn't.
The tool covers click testing (where do people actually tap on a design), prototyping, and usability analytics, all under a GPL-3.0 licence with Docker, Kubernetes and manual self-hosting documented directly in the GitHub repository. For a team that wants Figma's testing features without a Figma account, self-hosting removes the question of where the data goes entirely.
For anyone using the hosted quant-ux.com service instead of self-hosting, the specific data-centre region isn't independently confirmed here; the maintainer being demonstrably German is a stronger and more easily verified signal than a hosting-region claim would be.
What Quant-UX does well
- Maintainer is a named, address-verified individual in Germany, not an anonymous or foreign entity
- Fully open source under GPL-3.0, with documented Docker/Kubernetes self-hosting
- Free with no paid tier restricting features
- Covers click testing and prototype analytics in one tool
Where Quant-UX falls short
- One-person project: no company, no support contract, no guaranteed continuity
- Hosted SaaS version's specific data-centre region is not independently confirmed
- Smaller feature set than commercial research-ops platforms with dedicated teams
Standout feature. A maintainer who publishes his own name and address rather than hiding behind a company page — the opposite problem from the usual "who actually owns this" question this site has to answer for larger vendors.
Pros and Cons
Pros
- Maintainer is a named, address-verified individual in Germany, not an anonymous or foreign entity
- Fully open source under GPL-3.0, with documented Docker/Kubernetes self-hosting
- Free with no paid tier restricting features
- Covers click testing and prototype analytics in one tool
Cons
- One-person project: no company, no support contract, no guaranteed continuity
- Hosted SaaS version's specific data-centre region is not independently confirmed
- Smaller feature set than commercial research-ops platforms with dedicated teams
Frequently Asked Questions
What is Quant-UX?
Quant-UX is a free, open-source UX research and prototyping tool built by German software engineer Klaus Schaefers, offering click testing, prototyping and usability analytics with a self-hostable, GPL-3.0-licensed core.
Where is Quant-UX based?
Quant-UX is built and maintained by Klaus Schaefers, an individual based in Warburg, Germany (address published on the tool's own contact page), rather than by an incorporated company.
What does Quant-UX cost?
Free and open source, no paid tier found
Who is Quant-UX best for?
UX researchers and product teams who want click-testing and prototype analytics without sending session data to a Silicon Valley research-ops vendor, and who are comfortable with a tool maintained by one person rather than a company.
What are the drawbacks of Quant-UX?
One-person project: no company, no support contract, no guaranteed continuity Hosted SaaS version's specific data-centre region is not independently confirmed Smaller feature set than commercial research-ops platforms with dedicated teams
Is Quant-UX a good alternative to Figma (prototyping/testing features)?
Quant-UX is built as a European alternative to Figma (prototyping/testing features): Open-source UX research and prototyping tool built by a solo German maker. It will not be a like-for-like feature match in every respect, so check the review above for where the two genuinely differ before switching.
How does Quant-UX compare to other UX Research Tools?
Quant-UX is one of several European UX Research Tools we cover.