gevent
Coroutine-based Python networking library using greenlets.
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Free tier
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Aging · Jun 8, 2026Overview
What is gevent?
Gevent is a coroutine-based Python networking library that uses greenlet to provide high-level synchronous API on top of the libev event loop. It's designed for building scalable network services and applications with non-blocking I/O operations.
Key differentiator
“Gevent offers a unique approach to Python networking by leveraging greenlets for coroutine-based execution, providing an efficient way to handle multiple connections without the overhead of threads or processes.”
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Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Gevent is tightly coupled with Python and does not have native support for other languages, limiting its use in polyglot environments.
The greenlet-based coroutines can lead to performance bottlenecks when dealing with a large number of concurrent connections due to the GIL (Global Interpreter Lock).
Setting up gevent requires careful management of monkey patching, which can lead to subtle bugs if not done correctly.
The official documentation is sparse on detailed examples and best practices for more complex scenarios such as integrating with other Python libraries or handling edge cases.
Fit analysis
Who is it for?
✓ Best for
Python developers building highly concurrent network services that require non-blocking I/O operations
Teams needing to scale Python applications with efficient connection handling without the overhead of multi-threading or processes
✕ Not a fit for
Projects requiring real-time processing and low-latency responses where thread-based concurrency might be more suitable
Applications that do not benefit from non-blocking I/O operations, such as CPU-bound tasks
Cost structure
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Available
Open source — free to use
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$0
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Next step
Get Started with gevent
Step-by-step setup guide with code examples and common gotchas.