starlette

The little ASGI library that shines.

starlette Permissive license BSD-3-Clause Active v1.6.0 released 2026-08-08

Install

starlette on PyPI

pip

pip install starlette

uv

uv add starlette

poetry

poetry add starlette

Package facts

License	BSD-3-Clause (permissive)
Python support	supports the current Python release (>=3.10)
Install friction	low — pure-Python wheel
Runtime dependencies	2 — anyio, typing-extensions
Maintenance	actively maintained — 5 days since the last release
First released	2018-06-25
Popularity	one of the 100 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: starlette-1.6.0-py3-none-any.whl

Development Status :: 3 - AlphaEnvironment :: Web EnvironmentFramework :: AnyIOIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Internet :: WWW/HTTP

About starlette

from the package's own PyPI description — quoted content, verbatim

✨ The little ASGI framework that shines. ✨

Build Status (image) Package version (image) Supported Python Version (image) Discord (image)

Documentation: <a href="https://starlette.dev/"...

Read as markdown · JSON record · Source repository · Homepage · Docs

AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

Starlette is a lightweight ASGI framework for building async web services in Python, offering HTTP routing, WebSocket support, middleware, and background tasks with minimal dependencies.

Installation is straightforward with low friction—only two runtime dependencies (anyio and typing-extensions). Active maintenance with a release just 5 days ago signals ongoing support.

BSD-3-Clause permissive license allows commercial and private use with minimal restrictions, typical for web frameworks in this ecosystem.

Usage

pip install starlette
from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route

async def homepage(request):
    return JSONResponse({'hello': 'world'})

app = Starlette(routes=[Route('/', endpoint=homepage)])

Requires Python >=3.10; an ASGI server such as uvicorn must be installed separately to run the application.

Verdict: Starlette is a production-ready, actively maintained ASGI framework in the top 100 PyPI packages with minimal dependencies and no known vulnerabilities. Its permissive BSD license and low install friction make it suitable for building async web services, though you must separately install an ASGI server to deploy.

Needs verification

Whether the 'Development Status :: 3 - Alpha' classifier reflects current stability or is outdated given the production-ready claim in the description.
Performance characteristics relative to other ASGI frameworks at the scale your application requires.

asgi web framework pythonlightweight async http serverwebsocket support pythonasync web toolkitpython asgi routingminimal web frameworkasync background tasks