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Streamlit

Open-source Python framework for turning data scripts into shareable web apps and dashboards.

Open sourceSelf-hostableInternal tool builders
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About Streamlit

Streamlit lets data scientists and analysts build interactive web apps in plain Python. You write a script that loads data and calls functions for charts, tables, sliders, file uploads, chat interfaces and other widgets, and Streamlit renders it as a web page that reruns whenever a user changes an input, so there is no front-end code to write. It has become a standard way to share models, internal dashboards, data-exploration tools and LLM chat prototypes inside companies, with a large gallery of community components. The library is Apache-licensed and free, and apps can run anywhere Python runs. Streamlit, owned by Snowflake, offers free hosting for public apps on Community Cloud and a professional route through Snowflake for private apps with Git, CI/CD and enterprise security. It is excellent for data-centric tools, but the rerun model makes complex multi-page applications, fine-grained layouts and heavy user management awkward, and it is not designed for CRUD-heavy admin panels.

Best for: Data teams building internal dashboards and data apps in pure Python.

Pros and cons

What works

  • Apps in pure Python with no front-end work
  • Large community component gallery
  • Free hosting for public apps on Community Cloud

Why people leave

  • Rerun model makes complex apps awkward
  • Limited layout control
  • Not suited to CRUD-heavy admin panels

Top Streamlit alternatives

See all 5
  1. 1Reflex logo
    Reflex

    Pure-Python web framework with more control over layout and state for full apps.

    66.5
  2. 2Retool logo
    Retool

    Low-code builder better suited to CRUD admin panels and team workflows.

    62.6
  3. 3Windmill logo
    Windmill

    Turns Python scripts into workflows and UIs with scheduling and permissions.

    59.6
  4. 4Appsmith logo
    Appsmith

    Visual builder for operational tools rather than data-science apps.

    57.2
  5. 5ToolJet logo
    ToolJet

    Open-source builder that also supports Python in queries and logic.

    55.3

Why people left Streamlit

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

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Streamlit: common questions

Is Streamlit free?

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

Is Streamlit open source?

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

What platforms does Streamlit run on?

Streamlit is available for Web and Self-hosted.

What are the best alternatives to Streamlit?

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

See all 5 Streamlit alternatives