Some companies I've heard of: LinkedIn - in their website. Apple - on Help , Apple Watch User Guide Sony - Playstation Now Discourse - forum platform, open source Intercom Heroku.com Twitch.tv TED.com Nest store Indie Hackers - acquired by Stripe Creditas - Brazilian fintech startup, 200+ employees EBANX - Brazilian fintech startup, 700k+ users Eatwith - startup for dining Dollar Shave Club - acquired by Unilever ​Dockyard and their awesome PWA made with Ember .