ast-grep

ast-grep is ranked #3 of 40 in code search tools on The Geeks Club. It runs on API, Browser extension, Linux, macOS, Web, Windows. There is a free plan.

ast-grep plans and pricing

All plans

ast-grep Free Pricing not stated on the opened official pages ast-grep.github.io · 4 Oct 2026

Compared on code search tools

Indexing scope: codebase
Deployment: self_hosted
Regex search: Yes
Code navigation: Yes
IDE extensions: Yes

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ast-grep

Purpose: ast-grep is a fast, polyglot tool for structural code search, linting, and rewriting at scale.
Search and rewrite: It uses code patterns and abstract syntax trees to find and modify code across many files, with an interactive rewrite mode.
Linting: The scan command runs configurable AST pattern rules and supports severity levels including error, warning, info, and hint.
Languages: The project says it supports 20+ languages and allows custom languages to be loaded.
Custom rules: Rules are written in YAML and can combine pattern, kind, regex, relational, and composite matching conditions.
Rule testing: The CLI includes commands to create and test rules, with snapshot-based test options.
Integrations: The documentation describes editor integrations, including a VS Code extension and language server support for editors such as Vim and Neovim.
APIs: ast-grep provides a JavaScript API for programmatically inspecting and changing syntax trees, plus a WebAssembly API for browsers and other WASM environments.
Distribution: The CLI is distributed through npm, Cargo, Homebrew, MacPorts, Nix, and pip, and can also be built from source.
Security use: The example catalog includes rules for detecting security issues, such as a Go JSON tag vulnerability and C/C++ format string risks.
Support: The project directs users with questions or issues to GitHub or Discord and also points to Stack Overflow and Reddit.
Limits: The FAQ says ast-grep does not currently support some advanced static analysis information.
Publisher: The site credits Herrington Darkholme in its copyright notice.
What it does: ast-grep is a fast, polyglot tool for structural code search, linting, and large-scale rewriting.
Price from: Free

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Where it ranks on The Geeks Club

Best Code Search Tools in 2026#3 of 40
Best Code Refactoring Tools in 2026#3 of 22

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Sources

ast-grep.github.io· checked 4 Oct 2026
ast-grep.github.io/reference/cli.html· checked 4 Oct 2026
ast-grep.github.io/guide/rule-config.html· checked 4 Oct 2026
ast-grep.github.io/guide/tools/editors· checked 4 Oct 2026
ast-grep.github.io/guide/api-usage/js-api· checked 4 Oct 2026
ast-grep.github.io/guide/quick-start· checked 4 Oct 2026
ast-grep.github.io/catalog/go/unmarshal-tag-is-dash· checked 4 Oct 2026
ast-grep.github.io/contributing/how-to.html· checked 4 Oct 2026
ast-grep.github.io/advanced/faq· checked 4 Oct 2026
ast-grep.github.io/reference/playground· checked 4 Oct 2026