Alternatively, jrnl.sh. It's tiny, allows you write using your favorite editor, and can be backed up or replicated with simple git. It's even encrypted. Maybe I'm not the target demographic for services like these but I would never trust my personal thoughts with a service like this.
I use jrnl.sh on mac, and I can easily have it in my documents folder and sync it up to iCloud. I also back it up to a few other places, and since it's encrypted, I don't worry too much about people being able to peek.
The format being very simple has made it easy to hack up python scripts which allowed me to bring all my old livejournal entries, medium entries, and wordpress entries together into one diary.