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Comby

Free#37 of 42 in Code Search ToolsCode Refactoring Tools

Comby: A free, open-source tool for structural code matching and rewrite automation. Ranked #37 of 42 in Code Search Tools by our editors (4.9/10); pricing: Open source; best for structural search-and-rewrite automation.

4.9/10Editor score

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Comby4.9 Visit Comby

At a glance

Editor score
4.9 / 10
Pricing
Open source
Best for
Structural search-and-rewrite automation
Paid from
Free
Deployment
Self_hosted
Facts checked
20 Sep 2026

Where it wins
- Matches balanced code blocks, strings, and comments structurally
- Named-hole templates support repeatable search-and-rewrite workflows
- Interactive review, JSON-lines output, and local API access
Where it doesn't
- Self-hosted operation places setup and runtime management on the team
- Command-line workflows may be less suitable for non-technical users
- Rewrite automation requires creating templates and configuring matching rules

Our verdict on Comby

Comby is an open-source command-line tool for searching, matching, and rewriting code structures across many programming languages and data formats. It is aimed at developers handling one-off refactoring, large-scale code changes, reusable rewrite rules, and pattern-based maintenance. Structural matching covers balanced delimiters, strings, and comments, giving Comby a focus beyond plain text search while retaining embedded PCRE regular-expression support.

Its standout capability is template-driven structural rewriting. Named holes let users describe the parts of a pattern that may vary, then reuse those values in proposed changes. Recursive directory processing and file filtering extend that approach across a codebase, while interactive review provides a step for inspecting changes before applying them. Configuration files and reusable rewrite-template catalogs support repeatable workflows, and JSON-lines output exposes matched ranges and holes for downstream processing.

Comby runs locally through pre-built binaries, source installation, Docker, Python bindings, or a local HTTP server. Its Windows, macOS, and Linux support suits teams that want codebase processing under their own control, while the Python bindings and HTTP API provide integration paths beyond the command line. The tradeoff is that Comby is a self-hosted tool rather than a managed service, so teams need to choose and maintain their preferred installation and execution method. Pick it for structural search-and-rewrite automation with reviewable, reusable rules; choose another tool if the priority is a non-technical interface or a hosted workflow.

Your product? Our editors can test Comby in depth and publish a review, labelled as paid · from $149/mo →

Comby pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on comby.dev

Comby fact sheet

Free plan	Not verified
Paid from	Free
Indexing scope	Codebase
Deployment	Self_hosted
Supported languages	Not verified
Regex search	Yes
Code navigation	Not verified
IDE extensions	Not verified
Deployment	Self-hosted
Platforms	Windows, macOS, Linux
Support	Docs
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Open source
Website	comby.dev
Facts checked	20 Sep 2026

Alternatives to Comby

See all Comby alternatives →

Also Ranked In

Comby is ranked in 2 of our directories.

#14Code Refactoring Tools22 tools ranked

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Comby for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Comby is listed in our Code Search Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update