Sourcegraph

Sourcegraph is a code search and intelligence platform for organisations with many repositories. It indexes source across a codebase so a query can find a symbol, a pattern, or a usage across repositories that would otherwise be searched one at a time. Beyond search, the platform provides code intelligence: go-to-definition and find-references that work across repository boundaries, which matters when a shared library is consumed by many services. Batch changes apply a scripted edit across many repositories and track the resulting pull requests, which is how a large-scale refactor is coordinated. The product is open source in its core and available as a self-hosted or cloud deployment. It is aimed at organisations large enough that code is spread across many repositories; a small team with a handful of repositories will find a local search tool sufficient and the indexing overhead unjustified.