Frontend Frameworks

ty

An extremely fast Python type checker and language server.

Status
Generally available
Last checked
Checked · Oct 16, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

Ty is an open-source tool that provides rapid type checking for Python code. It serves as a powerful language server, enhancing developer productivity by offering real-time feedback on type errors.

Ty stands out as an extremely fast and efficient tool for Python type checking, offering real-time feedback through its language server capabilities.

When it fits — and when it doesn’t

A good fit for

  • Developers working on large-scale Python projects who need fast type checking and real-time error detection

  • Teams that require efficient static analysis tools for maintaining high-quality Python codebases

  • Individual developers looking to enhance their productivity with a powerful language server

Look elsewhere if

  • Projects requiring cross-language support beyond Python

  • Developers who prefer manual type checking over automated solutions

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited integrations with non-Python tools and ecosystems

    Primarily designed for Python, limited support for other languages or IDEs

  2. 02

    Performance issues in large codebases

    Type checking can become slow and resource-intensive as project size grows

What it does well

  • Extremely fast type checking for Python code

  • Serves as a language server providing real-time feedback

  • Enhances developer productivity with accurate error detection

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 ty

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →