Sourcegraph

Sourcegraph lets developers search across every repository their company owns, even when the code is spread over thousands of projects. It understands definitions and references, so you can jump from a function to everywhere it is used. On top of search, it adds AI that can answer questions about the codebase and help plan changes with real context from your repos. It also supports large-scale changes, such as updating the same pattern across many repositories in one go. Sourcegraph is aimed at enterprises, and pricing is custom. It matters most when the hard part is finding and understanding code, not writing a new file.