It’s hard to self-host right now, but Omnivore is a really, REALLY good project. I’ve actually retired my wallabag instance in favor of eventually moving to Omnivore (currently using the hosted version of Omnivore in the interim). And they are working on the self-hosting thing.

Plus side: the Omnivore iOS app (cannot speak to Android) has one of the best share sheets I’ve used, though right now it and the browser plugin don’t seem to be able to speak to self-hosted instances, though I haven’t tried that lately.