I wonder why I've got downvoted. It might sound like and advertisement but it's actually true.
We use Strapi in production alongside Eleventy, a simple static website generator.
One thing we've been missing with Strapi however is the possibility to localize content. I know the issue was raised but I'm not aware of any roadmap and we needed to hack our way around this limitation.
Strapi is a very promising piece of tech that enables great productivity and helps us with the data required for building sites using static website generators.
They already have most of your browsing history simply by having you logged into your Gmail and browsing the sites having Google Analytics installed (which is most of the sites on the internet these days).
This is not aimed to become an Invision competitor. There are however people for which Invision is too much and only need a simple way to share and collect a quick feedback one something they've been working on.
PM if you're interested in getting early access
PS: we offer free Pro accounts for ruthless & honest feedback