Zammad is a good example: it's open source[0] and packaged binaries are available if you want to self-host[1]. Corporations can: 1. Self-host for free but hir

Zammad is a good example: it's open source[0] and packaged binaries are available if you want to self-host[1]. Corporations can: 1. Self-host for free but hire their own engineers/sysadmins to maintain it 2. Pay for a per-seat hosted version from Zammad[2] 3. Self-host and pay for a support contract so that Zammad engineers can maintain it for you[3] [0] https://github.com/zammad/zammad https://github.com/zammad/zammad [1] https://zammad.org/ https://zammad.org/ [2] https://zammad.com/pricing#hosted https://zammad.com/pricing#hosted [3] https://zammad.com/pricing#selfhosted https://zammad.com/pricing#selfhosted