DroidCam (works on iOS too despite the name) https://www.dev47apps.com/ works great on Windows if you're looking for an alternative on a business / gaming OS and you have a smartphone (or tablet).
I've used it with Zoom / Google Meet / Discord and it's never failed me.
I use Iriun Webcam to use my (leftover) Android phone as a webcam into my MacBook Air and iMac, with Zoom, OBS and Quicktime. It works pretty decently, the only gripe is that I can't control exposure from the phone camera so it needs the right lighting to look nice.
There are also other apps out there, besides DroidCam and Iriun, that support different phone-computer connections.
I've used it with Zoom / Google Meet / Discord and it's never failed me.