Slightly related PSA: Everyone should consider running a wiki locally just for yourself. It's like being able to organize your brain. I just got into it two days ago and basically spent the whole weekend dumping things into it in a way I can actually browse and revisit, like the short stories I'd written, spread out across Notes.app and random folders. You don't need to run WAMP, MySQL, Apache, phpmyadmin or anything…
Just to throw my hat in the ring here: My co-founder and I have been building a hosted version of this[1] for the last two years, because we recognized that while self-hosted wikis work great for techie people, there are a lot of other people who that label doesn't fit. So we've been working to create a collaborative knowledge-base platform built around some key concepts: 1. Built around cards rather than documents,…
I did scan of the faq and ended up up on the docs and searched for export. I was pleasantly impressed with the entry which showed an export option along with text and videos showing how to do this.
For me, I probably won't be spending 300 on this when I can wiki or wordpress for free... but if I was not so jaded about saas and cloud, I would be persuaded to check out your thing if you had on the front page like "export, backup" and bonus if it was 'import/export markdown or similar files'
I'd feel less worried about vendor lockin, holding data hostage, what happens when you go bankrupt, etc
the heading fonts on your privacy page are a little wonky in my browser (firefox) - being that you are uk and sharing data with EU and outside the EU - I'd only save info if it was encrypted.. not sure if that is a thing, if so I would make 'privacy built in' a big thing on the front page.
my cents in trying to help, I'm sure 98% of those who may use your service are not as sensitive to the same things I am - so this is not a critique saying it's bad, just offering some random thoughts as I took a look.