I would rather see them leverage/contribute to existing cross-platform client-side backup software like ZManda[0] making the improvements needed to either make

I would rather see them leverage/contribute to existing cross-platform client-side backup software like ZManda[0] making the improvements needed to either make it work directly with B2 or integrate with Amanda. Keep your focus on the storage angle, there are ways to accomplish this, I use a "glue box" (Synology NAS) to collect the data and fire it off to B2, could easily be a linux machine running b2 cli tools[1]. [0]: https://wiki.zmanda.com/index.php/Zmanda_Windows_Client https://wiki.zmanda.com/index.php/Zmanda_Windows_Client [1]: https://www.backblaze.com/b2/docs/quick_command_line.html https://www.backblaze.com/b2/docs/quick_command_line.html