remote assistance software suggestions - eviltoast

I’ve been using RealVNC for family computer help and have been wanting to setup a self hosted replaced for a while now, but haven’t had the time. RealVNC has recently axed their free levels, so I’ll use it as a reason to setup a self hosted solution.

Ideally it would be something like a web page (I have a domain and reverse proxy) where family can go, get a code or a software to run, which will then let me control their system securely.

I was considering guacamole on a pi at each location I’m likely to have to support, but this doesn’t help when family is away from their home network on laptop.

What is out there for this? Have you used it? What are your experiences?

Thanks