The best open source alternative to GoToMeeting is Jitsi Meet, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to GoToMeeting and nine of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to GoToMeeting are Remotely (Free, Open Source), Briefing (Free, Open Source), OpenMeetings (Free, Open Source) and Nertivia (Free, Open Source).
Go ahead, video chat with the whole team. In fact, invite everyone you know. Jitsi Meet is a fully encrypted, 100% open source video conferencing solution that you can use all day, every day, for free — with no account needed. What else can you do with Jitsi Meet?
Nertivia is an chat client that allows you to chat to anyone across the world. There are a lot of features that don't require you to pay at all such as, gif profile pictures, free custom emojis and more coming soon!
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Nertivia vs GoToMeeting opinions
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Looks more similar to Discord, but doesn't yet have screensharing/streaming from Disc.
The best open source remote desktop software. It is an alternative of TeamViewer and AnyDesk, but open source. You have full control of your data, no concern of security. You can use my rendezvous/relay server, or set up your own, or write your own rendezvous/relay server.