You could bring your own own back up software. I would not recommend it unless you are or have a software developer very familiar with the software and are ready to support it, keep it updated, etc. It would be very stressful if windows did an update and all the sudden 1001customers have broken software and error messages on their screen.

You can bring your own software but it is all on you. I will provide the graphics and branding for it but I will not touch it.