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FOSS alternatives for Teamviewer
(feddit.de)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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I just read that they are sunsetting their own public server so in the future you might need your own server to make use of it. So if that is not something that you want to do that might be a reason to go for RustDesk instead.
It's better to run your own server anyway, and it's pretty easy to setup if you have tech experience.