I've been working with my wife on Uruky [1] for a couple of months, now. It's a EU-based Kagi [2] alternative (privacy-focused and ad-free search with domain boosting/exclusion rules).

We've been using it with friends and family semi-successfully (hashbangs work for edge cases we're still working on).

It's really difficult to get bigger indexes other than Mojeek and Marginalia to want to work with us and improve the results further, so that's something I've been researching more, lately. EUSP (the new Ecosia/Qwant-effort-related index) has finally replied to me last week, but I'm still waiting on an API key.

If you're interested in trying it for a few days and are a human, reach out with your account number and I'll give you a couple of weeks for free. We're pushing improvements daily.

[1] https://uruky.com

[2] https://kagi.com

P. S. It's weird to see this duplicate (posted less than a week ago in https://news.ycombinator.com/item?id=46874385), but this post has a lot more comments!

Eventual source code access is an interesting idea. What language is Uruky implemented in?