Sighthound - open-source vulnerability scanner for source code
We're open-sourcing Sighthound today, our rules-based static security scanner. What makes it special is that it's coded in rust and uses tree-sitter as it's AST making it very fast and easily extensible. Why build another scanner in 2026? We wanted to improve some of our detection outcomes but noticed the current open source scanners like Semgrep/Opengrep we're capped by a bunch of adoption limitations such as being written in OCaml, requiring a lot of work to add a language parser, and the rulesets were licensed differently and required paid offerings. It also felt that licensing was…
In plain words
Sighthound is an open-source static security scanner that analyzes source code for vulnerabilities using rules-based detection. Built in Rust with tree-sitter for its abstract syntax tree, it emphasizes speed and extensibility across multiple programming languages. It's designed for developers and security teams seeking a fast, easily customizable alternative to existing scanners, with straightforward licensing and a comprehensive ruleset.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
We're open-sourcing Sighthound today, our rules-based static security scanner. What makes it special is that it's coded in rust and uses tree-sitter as it's AST making it very fast and easily extensible. Why build another scanner in 2026? We wanted to improve some of our detection outcomes but noticed the current open source scanners like Semgrep/Opengrep we're capped by a bunch of adoption limitations such as being written in OCaml, requiring a lot of work to add a language parser, and the rulesets were licensed differently and required paid offerings. It also felt that licensing was moving backwards rather than forward. We wanted something that was very fast, was easily extensible and had a great set of rules that we could use. This led us to using Rust and Tree-sitter since they are both fast and have great community adoption making extending Sighthound natural. We wanted it to focus on source-code vulnerability classes like Sql Injection, and Xss. We haven't yet done any secrets scanning as there are a lot of great options in the market at the moment. Right now, Sighthound supports Python, JS/TS, Java, Go, C#, HTML, PHP and Ruby. We still have a lot of work to do so, we'd love for your feedback, and contributions in however they come from adding new languages, new rules or bug fixes.
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