I went through the same process earlier this year after receiving a note that they intended to raise my annual charge to over $1100, from the $150 or so I’d been paying for a decade or more.

In the end I opted to roll my own invoicing solution and keep Harvest for time tracking, since it saved me having to reimplement the Mac app and meant my costs actually dropped to $110 or so. I’m under no illusion that the vampires won’t close that loophole as well, but since I’ve had good success vibecoding some Swift apps in recent months I’ll be happy to take on the time tracking app next time too. It’ll be nice to stop sending them any money regardless.