Debuly
Streamlit logo

Streamlit

Open-source Python framework that turns data scripts into shareable web apps without any front-end code.

Open source

What is Streamlit?

Streamlit is an open-source Python framework for building data apps from plain scripts. You write Python, add a widget the same way you would declare a variable, and the page reruns and updates each time you save the file, so there is no backend, routing or HTML, CSS and JavaScript to write. Data scientists and machine learning engineers use it to wrap dataframes, charts, models and chat interfaces in something a colleague can open in a browser. The framework itself costs nothing to install. For hosting, Streamlit lists a free Community Cloud that deploys an app straight from a GitHub repository, plus Streamlit in Snowflake for private apps with enterprise security, whose price is not published on the site. Recent release notes mention a chart command for Apache ECharts, async and await support, and live updates for text inputs. A browser playground lets you try it before installing anything.

Use cases

  • Build interactive dashboards from Python scripts
  • Share machine learning model demos
  • Prototype data tools without a front end
  • Deploy a public app from a GitHub repo
  • Visualize dataframes and charts in the browser
  • Run private data apps on Snowflake

Who it's for

  • Data scientists
  • ML engineers
  • Python developers
  • Analytics teams

Why use Streamlit

  • Turn an existing analysis script into a working web app in minutes, without learning a web stack.
  • Iterate quickly because the app refreshes whenever you save the source file.
  • Keep your code in your own GitHub repository while Community Cloud handles containers and hosting.
  • Choose where it runs: a free public host, Snowflake for private apps, or another platform of your own.

Streamlit features

  • Pure Python API with no front-end code required
  • Widgets declared like ordinary variables
  • Apps rerun and refresh automatically when you save
  • Free Community Cloud deploys from a GitHub repo
  • Live app updates on every git push
  • Per-app viewer allow-lists to restrict access
  • Secure connections to data sources
  • Streamlit in Snowflake for private, enterprise-grade apps
  • Browser playground to try it without installing
  • Charting including Apache ECharts support

Streamlit integrations

  • GitHub
  • Snowflake
  • GitHub Codespaces
  • pandas
  • Apache ECharts

How to get started with Streamlit

  1. Install Streamlit as a Python package and write a script that imports it and calls functions such as write, line_chart or a widget.
  2. Run the script locally and the app opens in your browser, updating each time you save the file.
  3. Add widgets like text inputs to make the app interactive; they behave like variables in your code.
  4. Push the code to GitHub, sign in to Community Cloud, pick the repo, branch and file, and click Deploy.
  5. Every later git push updates the hosted app automatically.

Streamlit limitations

  • Community Cloud is described on the homepage as public apps only
  • Streamlit in Snowflake pricing is not published on the site
  • Script-driven model suits data tools more than large multi-page products

Streamlit pricing

Streamlit is open source, so you can use and self-host it for free.

Streamlit plans

  • Community Cloud

    Free

    • Deploy from a GitHub repository
    • Apps update on every git push
    • Per-app viewer allow-lists
    • Public profile page
  • Streamlit in Snowflake

    Price on vendor site

    • Unlimited private apps
    • Enterprise-grade reliability and security
    • Role-based access controls

Plans as listed on the official pricing page on . Prices can change and may vary by country or exclude tax. Check the official pricing page.

Streamlit alternatives

The main Streamlit alternatives listed on Debuly are Gradio, Chainlit, FastMCP, BayesiaLab, IBM watsonx.ai and LMQL. The table compares pricing and platforms; order is A–Z.

Streamlit compared with its alternatives
ToolPricingStarting pricePlatforms
StreamlitOpen source—Web
BayesiaLabPaid—Desktop, Web, API
ChainlitOpen source—Python package, Self-hosted
FastMCPOpen source—Python, CLI, API
GradioOpen source—Web, API, Self-hosted, Python
IBM watsonx.aiFreemium—Web, API, SDK
LMQLOpen source—Python, CLI, Web, Self-hosted
  1. BayesiaLab

    Bayesian network software for machine learning, knowledge modeling, simulation and optimization, with an engine API

  2. Chainlit

    Open-source Python framework for building chat interfaces for LLM apps, now archived and no longer maintained.

  3. FastMCP

    Python framework for building Model Context Protocol servers, clients and interactive apps, with managed hosting via Prefect Horizon.

  4. Gradio

    Open source Python library for turning machine learning models into web apps and demos that you can share by link.

  5. IBM watsonx.ai

    IBM's AI development studio for building generative AI apps and agents with foundation models, prompt tools, and machine learning, billed by usage.

  6. LMQL

    Programming language from ETH Zurich for LLM prompting that adds Python control flow, typed variables and hard output constraints.

Streamlit FAQ

How much does Streamlit cost?

The framework is free and open source. Streamlit Community Cloud, its hosting service, is described as totally free and needs only a GitHub account. Streamlit in Snowflake, the option for private apps, does not list a price on the Streamlit site.

Is there a free plan for hosting Streamlit apps?

Yes. Community Cloud lets you deploy apps from a GitHub repository at no cost. The homepage describes it as public apps only, so private apps point to Snowflake or another platform.

What hosting options does Streamlit offer?

The site names Community Cloud for free public apps, Streamlit in Snowflake for unlimited private apps with enterprise-grade security, and the option to deploy elsewhere, since the framework is not tied to one host.

Who is Streamlit for?

It is aimed at data scientists, machine learning engineers and other Python developers who want to share analyses, models or dashboards without building a separate front end.

Is Streamlit open source?

Yes, Streamlit is described as an open-source Python framework, so you can install it and build apps without paying for the library itself.

What are alternatives to Streamlit?

Common alternatives for building Python data apps include Gradio, Dash, Panel, Shiny for Python, Chainlit and NiceGUI. The right choice depends on whether you need dashboards, model demos or chat interfaces.

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

  • Logo: from streamlit.io · fetched · Vendor trademark, used only to identify the product; removed on request
  • Cover: none collected yet, so a generated tile is shown.

Spot an error? Report an issue with this listing. We also remove a logo or image on the owner's request.