Tornado
Web framework and asynchronous networking library for Python.
Pricing
Free tier
Flat rate
Adoption
↗RisingLicense
Open Source
Data freshness
Verified · Jul 16, 2026Overview
What is Tornado?
Tornado is a web framework and asynchronous networking library written in Python. It allows developers to build scalable network applications, including long polling, WebSockets, and other applications that require a long-lived connection to each user.
Key differentiator
“Tornado stands out as an open-source, Python-based solution for building scalable and high-performance web applications with support for asynchronous operations, making it ideal for real-time web features.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Compared to more popular frameworks like Django or Flask, Tornado has fewer pre-built integrations and plugins.
GitHub issues may take longer to resolve due to a smaller core development team and user base compared to more popular frameworks.
Fit analysis
Who is it for?
✓ Best for
Developers building highly scalable and performant web applications with Python.
Teams requiring asynchronous processing capabilities for real-time features.
✕ Not a fit for
Projects that require a fully managed backend service without self-hosting.
Applications needing extensive AI model integration out-of-the-box.
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Works well with
Next step
Get Started with Tornado
Step-by-step setup guide with code examples and common gotchas.