Quart
A Python ASGI web framework with the same API as Flask
Decision gist · record as of 2026-08-14
Yes. Quart is actively maintained, has low install friction, carries no security vulnerabilities, and uses a permissive MIT license. It's a solid choice if you need async web capabilities and prefer Flask's familiar API over learning a different framework. The main constraint is the Python 3.11+ requirement.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.11 or later.
- Low friction install with a pure-Python wheel.
- Active maintenance with a recent release (22 days ago) and steady repository activity.
License · maintenance · safety
MIT (permissive) — MIT license is permissive and imposes no significant restrictions on use, modification, or distribution in most contexts.
last release 2026-07-23 (22 days) · last repo commit 2026-08-14 · 3,657 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 3,668,288 downloads/mo, #2,534 on PyPI
Alternatives
Verify before relying
pip install quart
from quart import Quart, render_template
app = Quart(__name__)
@app.route("/")
async def hello():
return await render_template("index.html")
if __name__ == "__main__":
app.run()- Extent of Flask extension compatibility beyond what the description states.
- Performance characteristics and scalability limits compared to other async frameworks.
What it is and what it does
Quart is an async reimplementation of Flask that lets you build modern Python web applications using async/await syntax. It handles HTTP requests, WebSocket connections, template rendering, and JSON APIs using an ASGI server (Hypercorn by default). If you know Flask, Quart's API will feel familiar—the main difference is that route handlers and related functions are async, allowing non-blocking I/O throughout your application.
Quart sits in the top 5000 PyPI packages by download volume and has been actively maintained since 2017. It depends on Flask, Werkzeug, Jinja2, and other stable libraries from the Pallets ecosystem, plus Hypercorn for async serving. The framework is typed and targets current Python versions (3.11+), making it suitable for new projects that need async capabilities without learning an entirely different web framework.
Use it for
- Build async REST APIs that handle concurrent requests efficiently without blocking.
- Serve real-time WebSocket connections for chat, notifications, or live data feeds.
- Migrate existing Flask applications to async by adding await keywords and using Quart's compatible API.
- Render HTML templates asynchronously in a web application with async database or I/O operations.
- Stream large request or response bodies without loading them entirely into memory.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
Quart is actively maintained, has low install friction, carries no security vulnerabilities, and uses a permissive MIT license. It's a solid choice if you need async web capabilities and prefer Flask's familiar API over learning a different framework. The main constraint is the Python 3.11+ requirement.
Install
quart on PyPI
Before you install
Low friction install with a pure-Python wheel. Active maintenance with a recent release (22 days ago) and steady repository activity. Depends on established web libraries like Flask, Werkzeug, and Hypercorn, all of which are well-maintained.
Requires Python 3.11 or later.
License in practice
MIT license is permissive and imposes no significant restrictions on use, modification, or distribution in most contexts.
Quickstart
pip install quart
from quart import Quart, render_template
app = Quart(__name__)
@app.route("/")
async def hello():
return await render_template("index.html")
if __name__ == "__main__":
app.run()Verify before relying
- Extent of Flask extension compatibility beyond what the description states.
- Performance characteristics and scalability limits compared to other async frameworks.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.11 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 9 packagesaiofilesblinkerclickflaskhypercornitsdangerousjinja2markupsafewerkzeug |
| Maintenance | Actively maintained 22 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 3,668,288 / month, #2,534 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaEnvironment :: Web EnvironmentFramework :: FlaskIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: PythonTopic :: Internet :: WWW/HTTP :: Dynamic ContentTopic :: Software Development :: Libraries :: Application FrameworksTyping :: Typed |
Evidence: quart-0.21.0-py3-none-any.whl
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See also quart-cors · quart-schema · quart-auth · uvicorn · async-asgi-testclient · Flask · quart_babel · starlette · graphql-server · Hypercorn