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Reflex

Open-source framework for building full-stack web apps and internal tools entirely in Python.

Open sourceSelf-hostableInternal tool builders
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About Reflex

Reflex is an open-source framework for writing complete web applications, front end and back end, in Python. Components, layout, styling and state are all defined in Python and compiled to a React front end with a FastAPI-style backend, so Python developers can build dashboards, admin tools and customer-facing apps without learning JavaScript. Unlike Streamlit's rerun model, Reflex uses explicit state classes and event handlers, which makes larger multi-page apps easier to structure. The company also offers an AI builder that generates Reflex apps from prompts and Reflex Cloud for hosting, with managed databases, authentication and team features, and pitches the platform for internal software. The framework itself is Apache-licensed and can be self-hosted anywhere. Cloud pricing has a free tier for a single public app, a Pro plan with a monthly usage allowance, and larger team and enterprise options. It is younger than Streamlit, with a smaller component ecosystem, and still needs real programming skills.

Best for: Python developers who want full web apps and internal tools without writing JavaScript.

Pros and cons

What works

  • Full-stack apps in Python only
  • Explicit state model scales to larger apps
  • Apache-licensed and self-hostable

Why people leave

  • Smaller ecosystem than Streamlit or React
  • Requires programming skills
  • Cloud features cost extra

Top Reflex alternatives

See all 5
  1. 1Streamlit logo
    Streamlit

    Quicker for simple data apps and dashboards, with a bigger community.

    66.5
  2. 2Refine logo
    Refine

    React framework for teams comfortable with JavaScript.

    62.6
  3. 3Retool logo
    Retool

    Low-code builder that needs much less code for standard tools.

    59.6
  4. 4Windmill logo
    Windmill

    Python scripts become workflows and UIs with built-in scheduling.

    57.2
  5. 5Appsmith logo
    Appsmith

    Open-source visual builder for CRUD-style internal tools.

    55.3

Why people left Reflex

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Reflex: common questions

Is Reflex free?

Yes. Reflex is free, open-source software that you can host yourself.

Is Reflex open source?

Yes. The source code is on GitHub at reflex-dev/reflex. You can also run it on your own server.

What platforms does Reflex run on?

Reflex is available for Web and Self-hosted.

What are the best alternatives to Reflex?

The highest-ranked Reflex alternatives right now are Streamlit, Refine and Retool. See the full ranked list for pricing, platforms and verified facts.

See all 5 Reflex alternatives