What is the top free pick among Lsp tools?

ty leads the Stack Gems list for Lsp tools. Verdict: MIT Astral type checker. Fast and young — measure it on your own codebase.

How many Lsp tools does Stack Gems review?

4: 4 free or open source. Each review has a verdict and an honest Catch; no tool pays for its spot.

Which Lsp tools have the most GitHub stars?

Helix (46.7k), Serena (30.5k), ty (19.9k), per GitHub on 2026-10-21. Stars measure attention, not fit; read the Catch.

What is the catch with ty?

Beta/maturing vs mypy/pyright — say so.

Tag

Lsp tools

4 reviewed tools: 4 free or open source.

Order: free and open source first, then hosted products with a real free tier, then paid-led; catalog order inside each group, with quiet or archived repos last. Not a score, and no tool pays for its place.

4 tools

tyMIT Astral Python type checker (beta) in Rust
Free / OSS · OSS/MIT · 19.9k GitHub stars
VerdictMIT Astral type checker. Fast and young — measure it on your own codebase.
CatchBeta/maturing vs mypy/pyright — say so. Don’t assume it already replaces either tool on every codebase. Distinct from Ruff (lint/format) even though same vendor.
HelixMPL-2.0 modal terminal editor — tree-sitter + LSP
Free / OSS · MPL-2.0 · 46.7k GitHub stars
VerdictMPL-2.0 terminal editor. Free forever; not Zed/Cursor.
CatchVs Zed: terminal modal + tree-sitter/LSP; not a GPU IDE. No Electron GUI, weaker AI-IDE surface than Cursor/Zed. Plugin story is thinner than Neovim.
SerenaMIT MCP toolkit: symbol-level retrieve/edit via free LSP
Free / OSS · OSS/MIT · 30.5k GitHub stars
VerdictMIT symbol MCP for agents. Free LSP core; JetBrains plugin is optional paid.
CatchComplements agents; it is not a turnkey SWE loop. JetBrains plugin backend is paid optional (free trial) — LSP path stays free. Symbol quality tracks whatever language server you wire.
HarperApache-2.0 offline privacy grammar checker — Rust (Automattic)
Free / OSS · Apache-2.0 · 16.9k GitHub stars
VerdictApache-2.0 offline grammar. Privacy-local vs Grammarly cloud.
CatchVs Grammarly SaaS: Harper is offline Rust grammar, not a cloud writing coach with tone/generative rewrites and team admin. Rule coverage and language support differ from Grammarly’s product surface — try it on your real prose. Not an LLM writing agent.

FAQ

What is the top free pick among Lsp tools?: ty leads the Stack Gems list for Lsp tools. Verdict: MIT Astral type checker. Fast and young — measure it on your own codebase.
How many Lsp tools does Stack Gems review?: 4: 4 free or open source. Each review has a verdict and an honest Catch; no tool pays for its spot.
Which Lsp tools can I self-host for free?: ty, Helix, Serena and Harper.
Which Lsp tools have the most GitHub stars?: Helix (46.7k), Serena (30.5k), ty (19.9k), per GitHub on 2026-10-21. Stars measure attention, not fit; read the Catch.
What is the catch with ty?: Beta/maturing vs mypy/pyright — say so.