Free open-source Znuny
self-hosted or own cloud · no licence fee
Checked 14 Oct 2026

self-hosted or own cloud · no licence fee
Checked 14 Oct 2026
Open-source software · free to use
Checked 7 Oct 2026
250GB storage · 35 service requests · 2 support contacts · dedicated hardware · daily backup · monitoring
Checked 14 Oct 2026
500GB storage · 65 service requests · 3 support contacts · dedicated hardware · daily backup · monitoring
Checked 14 Oct 2026
750GB storage · unlimited service requests · 5 support contacts · 24x7x365 service window · read-only database access
Checked 14 Oct 2026
35 service requests · 4h maximum reaction time · 2 support contacts · email and phone support · security advisories and patches
Checked 14 Oct 2026
65 service requests · 2h maximum reaction time · 3 support contacts · remote patch updates · email and phone support
Checked 14 Oct 2026
unlimited service requests · 0.5h maximum reaction time · 5 support contacts · 24x7x365 coverage · remote patch and minor-release updates
Checked 14 Oct 2026