Rewind.ai is ok (transcription accuracy is meh)
Voice Memos.app is ok (though no native transcription, and requires stopping and starting)
Otter.ai is ok (though there's a 4 hour limit on recordings, and there's no paid plan that allows for enough recording minutes to do 24/7)
My ideal solution would be that Otter comes out with a Pro 24/7 plan with 60,000 minutes per month and no max recording length, for $60-80/mo.
I would pay for this and have paid for alternatives, though I'd prefer to use an existing company that I've used for a while and that has lots of users, due to privacy/trust, or perhaps a small startup that publishes security reports and does everything on device.
As an aside:
I use 24/7 voice transcription as a kind of "extended context window" (to use an LLM analogy). While I'm working, I talk out loud to myself about what I'm thinking through, which I find allows me to effectively increase my working memory size to be much larger than otherwise. It's quite helpful.