YouCompleteMe
A code-completion engine for C-family languages and Python with Jedi integration.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is YouCompleteMe?
YouCompleteMe is a highly performant code completion engine designed to work within the Vim text editor. It supports multiple programming languages, including C++, Java, Objective-C, JavaScript, TypeScript, and Python with Jedi-based completion.
Key differentiator
“YouCompleteMe stands out as a powerful, locally installed code-completion engine specifically tailored for Vim users, offering fast and accurate suggestions across multiple programming languages including Python with Jedi integration.”
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
Does not natively support newer languages like Rust or Kotlin without significant configuration
Requires compiling from source, which can be error-prone and time-consuming
Can become sluggish when indexing very large projects, impacting real-time completion speed
Fit analysis
Who is it for?
✓ Best for
Developers who use Vim as their primary editor and require robust, language-specific code completion features.
Teams working on large-scale projects in C++, Java, or Python where quick access to function signatures and documentation is crucial.
✕ Not a fit for
Users of other text editors like Emacs or Visual Studio Code that have their own native completion engines.
Developers who prefer cloud-based IDEs with integrated AI features over local installations.
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 YouCompleteMe
Step-by-step setup guide with code examples and common gotchas.