lex
★ 52
vs
lean-ctx
★ 2.3k
lex vs lean-ctx
lex: Lex provides programmatic access to millions of UK legal documents with advanced semantic search. It supports Model Context Protocol integration for AI assistants and includes datasets for legislation, explanatory notes, and amendments.; lean-ctx: lean-ctx is an open-source MCP server designed to drastically reduce LLM token costs for AI coding tools like Claude Code, Cursor, and Copilot. It achieves this by transparently compressing CLI output and file context, offering up to 99% savings and making AI coding faster, cheaper, and more effective without changing workflows.
01
TL;DR
Choose lex if…Legal Research - Find precedents and relevant legislation in seconds
Choose lean-ctx if…Reducing token costs for Claude Code, Cursor, and Copilot
02
Side-by-Side Comparison
03
Features
lex01Comprehensive UK legislation data from 1267 to present
02Semantic search capabilities
03Model Context Protocol (MCP) integration
04AI-powered PDF digitization for historical legislation
05Support for multiple AI assistant platforms
lean-ctx01Transparent shell hook for CLI output compression
02Context server with 28 intelligent tools
03One-command integration for AI coding agents
04Adaptive LLM communication with Cognitive Efficiency Protocol
05Cross-session memory for context continuity
04
Use Cases
lex↳Legal Research - Find precedents and relevant legislation in seconds
↳Policy Analysis - Track legislative changes over time
↳AI Grounding - Ground AI assistants in authoritative UK legal sources
lean-ctx↳Reducing token costs for Claude Code, Cursor, and Copilot
↳Optimizing MCP server performance
↳Saving $30-100+ per month on AI coding API costs
05
Best For
lexTrendingAPI Integration
lean-ctxHidden GemDev ToolingMemory & Context
FAQ
FAQ
What is the difference between lex and lean-ctx?
Both lex and lean-ctx are in the Dev Tooling category. lex has 52 stars, while lean-ctx has 2.3k stars.
Which is better, lex or lean-ctx?
The best choice depends on your use case. Choose lex if Legal Research - Find precedents and relevant legislation in seconds, and lean-ctx if Reducing token costs for Claude Code, Cursor, and Copilot.
Is lex free or open source?
Yes, lex is open source on GitHub (MIT).
Is lean-ctx free or open source?
Yes, lean-ctx is open source on GitHub (MIT).
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