[diesal11]

Spotify is web based but not electron

[paxys]

It uses Chromium Embedded Framework (https://en.wikipedia.org/wiki/Chromium_Embedded_Framework), which is very similar.

[justinmchase]

It does, they basically use the same approach but before Electron was invented.

[justinmchase]

Steam also.

Embedded web with a native underpinning but not electron, totally custom made just like Spotify but their own creation.