sqry vs Understand

sqry is an open-source code analysis tool from Verivus Pty Ltd. It parses source code into an abstract syntax tree and a graph of symbols and relationships, then answers structural questions such as which functions call another. Its documented queries cover callers, callees, implementations, dependency cycles and unused symbols. The project lists 37 language plugins: 28 support full relation tracking, while nine extract symbols and imports. Users build an index before querying; it persists so later queries can load the cached graph snapshot. sqry runs locally on Linux, macOS and Windows, under the MIT license. Its maker says source code stays on the machine and the tool has no telemetry. It offers an MCP server for AI assistants, with 39 tools in standalone mode and a curated subset of 16 in daemon mode. An LSP server works with VS Code, Neovim, Helix and LSP 3.17 clients. Installers are listed for the three desktop platforms, as is cargo installation. Windows executables require bundled MinGW runtime DLLs; the release ZIP includes them.

Understand is a static analysis and code-comprehension tool from SciTools. It builds a cross-referenced model of source code without executing it, then helps users explore relationships through its Information Browser, call trees, dependency analysis, and visual graphs, including butterfly and control-flow views. It also provides metrics, CodeCheck, version comparison, APIs, a command-line interface, and AI chat. Supported languages include C/C++, C#, Fortran, Java, Python, Rust, VHDL, Visual Basic, and web languages such as HTML, CSS, JavaScript, TypeScript, PHP, and XML. It runs on Windows 11, specified Linux distributions, and macOS Monterey or later; command-line automation, CI, and an official Docker image are also available. The VS Code extension is separately licensed. Local AI keeps code and prompts on the user's hardware, while cloud AI sends requests with code context to the selected provider. Offline use is supported with offline licensing. Pricing includes a free plan and paid subscriptions from $100/user/mo (annual).