pyre-check
Performant type checking for Python codebases.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is pyre-check?
Pyre is a performant static type checker that helps developers catch errors early in the development process. It integrates seamlessly with existing workflows and supports large-scale projects, ensuring robust and maintainable code.
Key differentiator
“Pyre offers fast, incremental type checking specifically optimized for large Python codebases, making it a standout choice for teams that prioritize speed and scalability.”
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
Documentation and community resources are sparse for integrating with non-standard Python tools or frameworks
Scalability tests show significant slowdowns when checking projects with over 10k files
Fit analysis
Who is it for?
✓ Best for
Python developers working on large codebases who need fast and accurate type checking.
Teams that require integration with existing build systems and IDEs for seamless workflow.
✕ Not a fit for
Projects requiring real-time feedback outside of the development environment
Small-scale projects where setup overhead outweighs benefits
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
Integrations
Next step
Get Started with pyre-check
Step-by-step setup guide with code examples and common gotchas.