trio
A friendly library for async concurrency and I/O in Python.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is trio?
Trio is a modern, high-level library for writing asynchronous programs in Python. It simplifies the process of handling concurrent operations and I/O tasks with a clean and intuitive API.
Key differentiator
“Trio stands out by offering an intuitive and powerful approach to asynchronous programming in Python, making it easier to write efficient concurrent applications without the complexity of traditional async libraries.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Compared to more established libraries like asyncio, Trio has a smaller user base and fewer third-party integrations.
Trio's high-level abstractions can introduce performance penalties in highly optimized or resource-constrained environments.
Trio is primarily designed for Python and lacks official support for other languages, limiting its use in polyglot projects.
While comprehensive, the documentation may require significant time to fully understand due to its depth and breadth.
Fit analysis
Who is it for?
✓ Best for
Python developers who need to write efficient, asynchronous code.
Teams working on complex, concurrent systems that require structured concurrency.
✕ Not a fit for
Projects requiring real-time data processing with sub-millisecond latency.
Developers looking for a cloud-based managed service solution.
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
Integrations
Next step
Get Started with trio
Step-by-step setup guide with code examples and common gotchas.