Compare software

HomeServerHQ vs Simple NixOS Mailserver: catalog facts
HomeServerHQ	Simple NixOS Mailserver
Free Free and open source; optional paid professional support membership.	Free Free and open source under the GPL-3.0 licence.
Linux, Self-hosted	Linux, Self-hosted
Works behind CGNAT without open ports Email server, VPN and websites set up together	Whole mail server defined declaratively in NixOS configuration Releases track each NixOS release
Requires a domain name and a separate VPS relay Small community	Only works on NixOS Running a mail server still requires DNS and deliverability knowledge
Self-hosted, Operating system	Self-hosted
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.