Ask HN: Best public-facing issue trackers?

we've all struggle with issue trackers, and sometimes it's hard to find just the right one.

I'm struggling to find one for my start-up that is public (customer) facing for closed-source projects that allow users to submit and track bug reports.

Trac has been the go-to for many people for a long time, but it is somewhat long in the tooth.

so, I ask you HN, what issue tracking software do you use for customers? I'd prefer to find something that I can self-host.