[eyelidlessness]

It’s several things that package well together, plus some payable value add for certain use cases.

- they develop Next.js which is one of the two primary React-based solutions for static/server/client rendered websites (the other being Gatsby)

- they provide low friction deployment solutions for same (like heroku)

- they provide tools for specific markets attracted to one or both of the above, e.g. ecommerce

- probably a fair bit more, but those are their standout offerings

Worth noting that Next.js is a mix of custom offerings (they have their own solutions for things like static site generation and image optimization) and configurations for existing tools (a lot of what works well is a predefined set of Babel and Webpack configs, but they can be overridden unlike create-react-app, and there’s broad support for that).