Someone recently complained that using JetPack's Akismet anti-spam plugin wasn't very privacy friendly.
So, because I take every minor complaint as a personal rebuke, I decided to switch to AntiSpam Bee - an open source and local antispam solution.
And... it's pretty good! There is the occasional false negative - but not significantly worse than JetPack.
Most of the false negatives are from non-English language comments:
There are settings so that you can reject comments which aren't in your native language. But that comes with privacy implications.
I didn't spot any false positives - but I get hundreds of spam comments per day.
It's a little more fiddly than Akismet. But, as a power user, I appreciate that. It's also less reliant on a centralised service - who knows what weird AI grab Akismet will do with all the comments it moderates?
You can grab the source code from GitHub