Twisted
Event-driven networking engine for Python
- Status
- Generally available
- Last checked
- Checked · Oct 13, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Twisted is an event-driven networking engine written in Python. It provides a framework to build scalable network applications and supports various protocols.
Twisted offers a comprehensive and flexible framework for building scalable network applications in Python, focusing on event-driven programming.
When it fits — and when it doesn’t
A good fit for
Python developers building complex, event-driven network applications
Teams needing a robust framework for handling multiple protocols and connections
Projects requiring high performance and scalability in network communication
Look elsewhere if
Developers looking for a simple HTTP server (Twisted is more complex)
Projects that require real-time data streaming with low latency
Applications where the overhead of an event-driven architecture would be prohibitive
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited support for modern asynchronous programming patterns
Twisted's Deferred model is less intuitive and powerful compared to async/await in Python 3.5+
- 02
Documentation, while extensive, can be outdated or incomplete
Some examples and tutorials do not reflect the latest version of Twisted
- 03
Performance overhead due to its event-driven model
Twisted's reactor loop can introduce latency in high-throughput scenarios compared to native I/O operations
What it does well
Event-driven architecture for scalable network applications
Supports multiple protocols including TCP, UDP, SSL/TLS
Extensive documentation and community support
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up Twisted
Setup steps, common gotchas and what to check after 30 days.
Get the badge
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