NiceGUI vs Reflex
A side-by-side comparison of two self-hosted developer tools & git options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | NiceGUI | Reflex |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 95 · Excellent | 98 · Excellent |
| Category | Developer Tools & Git | Developer Tools & Git |
| License | MIT | Apache-2.0 |
| Language | Python | Python |
| Setup difficulty | Easy | Medium |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, source, binary | docker, source |
| GitHub stars | ★ 16,234 | ★ 28,909 |
| First released | 2021 | 2022 |
| Replaces | Streamlit, Gradio | Streamlit, Retool |
What are NiceGUI and Reflex?
NiceGUI
NiceGUI is a Python framework for creating web-based user interfaces and dashboards with minimal code, running on a built-in server. It is ideal for self-hosted internal tools and hardware control panels.
- Web UIs in pure Python
- Built-in web server
- Live updates
- Great for dashboards
Reflex
Reflex is an open-source framework for building and deploying full-stack web applications entirely in Python without writing JavaScript. The compiled apps can be self-hosted on your own infrastructure.
- Pure Python web apps
- No JavaScript needed
- Built-in components
- Self-hostable deploys
NiceGUI vs Reflex: key differences
Both projects are written in Python. Licensing differs — MIT for NiceGUI versus Apache-2.0 for Reflex. NiceGUI is the lighter option, starting around 256 MB of RAM against 512 MB for Reflex.
Why pick each one
Choose NiceGUI if…
- Pure Python UIs
- Built-in live updates
- Great for hardware panels
Watch out for
- Not for complex frontends
- State lives server-side
Choose Reflex if…
- Pure Python full stack
- No JavaScript needed
- Compiles to React
Watch out for
- Node.js build dependency
- API still evolving
Frequently asked questions
Is NiceGUI or Reflex better?
Neither is universally better. Reflex has the larger community, while NiceGUI is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are NiceGUI and Reflex free and open-source?
Yes. NiceGUI is licensed under MIT and Reflex under Apache-2.0. Both can be self-hosted at no software cost.
Can I run NiceGUI and Reflex with Docker?
NiceGUI: yes. Reflex: yes.
Which is lighter on resources, NiceGUI or Reflex?
NiceGUI has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Reflex. Real-world usage depends on library size, user count, and enabled features.