We’re releasing our first beta build of Insync for Flatpak! 
This is an early test release, so you may encounter bugs or desktop-integration issues. We’d appreciate your feedback, including your Linux distribution, desktop environment, and any relevant logs.
https://cdn.insynchq.com/test/Insync-beta-1.flatpak
flatpak install --user /path/to/Insync-beta-1.flatpak
flatpak run com.insynchq.Insync start
This is very welcome news
Mine is failing to start with the error message:
matkeith@bazzite:/var/home/matkeith/Downloads$ flatpak run com.insynchq.Insync start
F: Not sharing “/dev” with sandbox: Path “/dev” is reserved by Flatpak
I am using bazzite 44 with KDE
Correction: it was working but there is no system tray icon so I couldn’t see it. The error is just a notification that /dev can’t be passed and is being ignored. I provided Mia the details.
Finally! just one question…not sure if it’s going to be in conflict with my actual install…so to test it, it would be better in a distrobox I suppose? or what do you recommend?
Good question! Let me check with our engineers 
Very sorry for the long wait, @SolidCapo! Distrobox would be the recommendation
Hi y’all. TYSM for this! Coming from CachyOS the install instructions worked perfectly and Insync is fully functioning right now. 
I’ve just installed this on Fedora Kinoite 44 / KDE Wayland / NVIDIA 610.57.04 and I encountered a small problem: the flatpak beta exits with:
libnvidia-egl-wayland2.so.1: undefined symbol: wl_proxy_marshal_flags
From some poking around, /app/lib/insync/libwayland-client.so.0 does not export wl_proxy_marshal_flags. The Freedesktop 25.08 runtime copy does. My workaround:
flatpak override --user --env=LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libwayland-client.so.0 com.insynchq.Insync
That forces it to use host’s libwaylandclient.so.0 and InSync starts as expected. So basically the problem is a stale library.
I can put this in the bug reports channel if you like.