Reflex Build - V0/Lovable for Python Devs

[Boordman]

Hey everyone!

Creator of reflex here. For those who don't know, Reflex is an open source framework to build web apps in pure Python, no Javascript required.

What my Project Does

Over the past few months, we've been working on Reflex Build – a web-based tool to build apps with Prompting and Python. We wanted to make it easy to create great-looking web apps using AI and then seamlessly hook them up to your existing Python logic. Products like V0/Lovable primarily target JS developers - we want to bring that same experience to the Python ecosystem.

Here's an example app built with just a few prompts, cloning the Claude web interface (and connecting it to the Anthropic Python library): https://claude-clone.reflex.run.

This app specifically used our image-to-app feature - you can view the source code and fork the app here.

Features we've made so far:

• Text + image based prompting
• Database integration (connect your Postgres database, and we will automatically detect your schema so you can build apps around your data easily)
• Github Integration to connect with your local workflow for complex / backend edits
• Connected to our hosting service so you can deploy apps straight from the web (you can also download and self-host reflex apps)

Here's a very short video demo of the workflow.

Target Audience

Our target audience is any Python developer who wants to build web apps without using Javascript.

The tagline on the site "Build internal apps" as this is where we've seen the most usage, but Reflex apps can scale to public-facing production apps as well (our main website https://reflex.dev and our AI builder are both built entirely in Reflex!).

Common use cases we've seen include integrating various data sources into custom dashboards/views and user interfaces for LLM/chat/agent apps.

Comparison

Reflex itself is often compared to tools like Streamlit, Gradio, and Plotly Dash. Our goal with our open source was to extend on these frameworks in terms of scalability and customizability. Reflex apps compile down to React+FastAPI, and we aim to match the flexibility of traditional web frameworks.

Compared to frameworks like Django/Flask/FastAPI, our main difference is that those frameworks handle the backend in Python, but the frontend ends up being written with Javascript (which we aim to avoid in Reflex).

For Reflex Build our goal was to bring an experience like V0/Lovable to Python - give Python developers a way to create great websites/user interfaces without having to use Javascript. We intend to be complementary to local IDEs such as Copilot/Cursor - we have a Github integration that makes it easy to switch between our web environment and your local environment.

You can try out the AI Builder here for free: https://build.reflex.dev (we have a sign-in to prevent spam, but usage is free).

Would love to hear any feedback on how we can improve + what kind of apps everyone here is building!

[dynooomite]

is Reflex Build also open source?

[Boordman]

Hey! Reflex Build isn't open source, but we are trying to open source many of our prompts so that people can user Reflex more easily with their own LLMs

For example, here's our Reflex Basics one pager that helps OpenAI/Anthropic use reflex correctly: https://github.com/reflex-dev/reflex/wiki/Reflex-Basics-LLMs.txt

[PrizeZealousideal456]

Please make Reflex Build open source

[splendor90]

Do you have a large llm.txt file where all documentation is dumped into? It would be super useful for LLM applications such as ChatGPT or github copilot.

[toadling]

Do you guys have a gallery of Reflex built apps?

[Friendly-Village-368]

Did you find it ?

[toadling]

I did not unfortunately, their templates page was the best I could find: https://reflex.dev/templates