ast-grep vs Code Search
ast-grep
ast-grep.github.io
Code Search
code-search.techquests.devSide by side
| Figure | ast-grep | Code Search |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · Code Search Tools | 9.1 (#1) | 8.1 (#6) |
| Purpose | ast-grep is a fast, polyglot tool for structural code search, linting, and rewriting at scale. | Code Search is a self-hosted code search and replace platform with CLI support for batch operations across repositories. |
| Support | The project directs users with questions or issues to GitHub or Discord and also points to Stack Overflow and Reddit. | Community support is available through GitHub Issues, while Enterprise includes priority support. |
Plans
In their own words
ast-grep
ast-grep is a free, open-source tool for structural code search, linting, and rewriting. It matches patterns against syntax-tree nodes, helping developers locate and change code across a codebase rather than searching plain text. Its CLI can preview and apply rewrites interactively, and scan configurable YAML rules with error, warning, info, or hint severity. Rules can combine pattern, kind, regex, relational, and composite conditions, and CLI commands help create and snapshot-test them. The project says it supports more than 20 languages and can load custom languages. JavaScript and WebAssembly APIs allow programmatic syntax-tree work; a browser playground offers a way to try patterns without local installation. Editor options include a VS Code extension and language-server setups, including for Vim and Neovim. The tool is free, has a web interface, and is distributed through package managers or built from source. Its FAQ notes that some advanced static-analysis information is unsupported, and one rule cannot target multiple languages at once.
Code Search
Code Search is a self-hosted platform for searching and changing code across repositories, with CLI support for batch work. Zoekt provides sub-second repository search; SCIP features support go-to-definition, find-references and symbol search. Teams can make replacements across multiple repositories and have the platform create branches and merge requests. A built-in MCP server connects assistants such as Claude and Cursor for code search, browsing and navigation. Supported code hosts include GitHub, GitHub Enterprise Server, GitLab, self-hosted GitLab, Gitea, and Bitbucket Cloud and Server. Deployment choices include Docker, source builds, Kubernetes and Helm. The maker says code and data stay on customer servers and the application sends no telemetry or usage data back. Community is free and includes unlimited users. Enterprise adds OIDC single sign-on, role-based repository permissions, audit logging and priority support; pricing is on request. Community support is available through GitHub Issues, and the project is licensed under Apache License 2.0.