Is BmuS Open Source?

No. It is a “Internal Use” or “Freeware for Business” license.

Here is the license:

BmuS COMMUNITY SOURCE – AVAILABLE LICENSE

Copyright (c) [2025] [Niels Gerhardt / BmuS – Back Me Up Scotty]

  1. GRANT OF LICENSE
    Permission is hereby granted, free of charge, to any person or entity obtaining a copy of this software and associated documentation files (the “Software”), to use the Software for PERSONAL and INTERNAL BUSINESS purposes, subject to the following conditions: a) Internal Use: You may install and use the Software on an unlimited number of devices owned or controlled by you or your organization to perform backups of your own data or systems.
    b) Modification: You may modify the source code of the Software for your own internal needs or adaptation.
  2. RESTRICTIONS
    The rights granted above are strictly limited by the following prohibitions: a) No Sale or Resale: You may NOT sell, rent, lease, license, or sub-license the Software or any parts thereof. The Software must remain free of charge.
    b) No Commercial Distribution: You may NOT include this Software as part of a paid product, service package, or commercial distribution.
    c) No “Backup-as-a-Service”: You may NOT use the Software to offer a paid backup service to third parties where the Software itself is the primary value proposition.
    d) No Public Redistribution: You may NOT redistribute, upload to public repositories, or publish the source code or binaries (original or modified) to the general public.
  3. OWNERSHIP
    The original Author retains all right, title, and interest in and to the Software. Modifications made by you remain your property but are subject to the distribution restrictions of this license (i.e., you cannot sell or share your modifications publicly).
  4. DISCLAIMER OF WARRANTY
    THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. THE AUTHORS OR COPYRIGHT HOLDERS SHALL NOT BE LIABLE FOR ANY DAMAGES, DATA LOSS, OR LIABILITY ARISING FROM THE USE OF THE SOFTWARE. USE AT YOUR OWN RISK.