Sourcegraph CEO here. Happy to answer any questions.

Sourcegraph is code search and intelligence across all your code, integrated with your code host (even giving you IDE-like hovers, definitions, references, etc., when viewing code files and diffs on GitHub/etc.).

In addition to the things mentioned in the announcement, we've been making steady improvements to code intelligence. Check out https://about.sourcegraph.com/docs/code-intelligence.

One of the things we see is that basically 100% of devs at Google and Facebook use those companies' internal Sourcegraph-like tools for code search/intelligence, and it makes them a lot happier and more productive as devs. We think 100% of devs at every company should have amazing code search and intelligence.