Znuny (open-source software)
Free
Open-source and free to use
Checked 8 Oct 2026

Open-source and free to use
Checked 8 Oct 2026
250GB storage · 35 service requests · one time setup fee
Checked 8 Oct 2026
500GB storage · 65 service requests · no setup fee
Checked 8 Oct 2026
750GB storage · unlimited service requests · no setup fee
Checked 8 Oct 2026
35 service requests · 4h max reaction time · 2 authorized support contacts
Checked 8 Oct 2026
65 service requests · 2h max reaction time · 3 authorized support contacts
Checked 8 Oct 2026
Unlimited service requests · 0.5h max reaction time · 5 authorized support contacts
Checked 8 Oct 2026