Watching the trade press I've seen a lot of Evernote top execs leave the company recently. That's not always the death knell, but it didn't sound good to me. I hope they keep going as I've used them for years and pay for a pro license. My working day revolves around Evernote in a lot of ways, so I hope I'm wrong here.
I started out with OneNote. Back when it was part of the advanced Office packages I was paying for it too, but Evernote was better and more cross platform to a degree (web access). I dumped OneNote in favor of EverNote initially due to the better search and the Android App. OneNote does seem to have caught up in features, and now they're free, but I don't know how well they work on Linux.
Keep is only Chrome browser based...at least that was the situation last time I tried it. I'm not a huge Chrome fan so I haven't looked at it lately.