Selfhost Office

4 apps · curated stack

What this stack is

Self-host Office is the complete Microsoft 365 / Google Workspace replacement in one VPS deploy: files (Nextcloud), real-time collaborative docs (OnlyOffice), team chat (Mattermost), and email (Mailcow). For organizations that want full productivity sovereignty without subscribing to Microsoft, Google, or Slack.

For the hosting provider, this is the flagship "replace Microsoft 365" product — high-ARPU, high-retention, deep customer value. Sells to organizations of 10-200 users wanting full productivity-suite sovereignty.

What it's for

  • File sync + sharing — Nextcloud handles user folders, team folders, external sharing
  • Document editing — OnlyOffice provides real-time collaborative editing of Word/Excel/PowerPoint compatible documents
  • Team chat — Mattermost replaces Slack for internal communication, channels, threads, integrations
  • Email — Mailcow runs your domain's mail server with webmail (SoGo) + IMAP/SMTP
  • Calendar + contacts — Nextcloud CalDAV/CardDAV syncs with phones + desktop clients
  • Single sign-on — all four apps support OAuth/LDAP/SAML for unified identity

Who it's for

  • Mid-sized organizations (20-200 employees) seeking Microsoft/Google alternative
  • EU public-sector bodies subject to sovereign cloud + EU data residency mandates
  • Open-source-aligned companies (foundations, OSS projects, B-corps) preferring self-host on principle
  • Professional services firms (law, accounting, consulting) with strict client-data confidentiality
  • Educational institutions wanting student/staff productivity without per-seat licensing fees

Apps in this stack

App Role
Nextcloud File sync, sharing, calendar, contacts, tasks, central hub
OnlyOffice Real-time collaborative editing (Word/Excel/PowerPoint compatible)
Mattermost Team chat — channels, threads, file sharing, integrations
Mailcow Mail server — IMAP, SMTP, webmail (SoGo), DKIM, SPF, DMARC

Sizing & deployment

  • Recommended VPS: 16 GB RAM, 6 vCPU, 80 GB NVMe storage
  • No GPU needed
  • Mail-heavy — sizing scales with user count + average mailbox size; budget 5-10 GB per user
  • DNS work required — Mailcow needs proper MX + SPF + DKIM + DMARC records (the suite install includes the DNS instructions)
  • Deploy time: ~30-40 min one-click (Mailcow has many components), all SSL automatic via Let's Encrypt
  • Backup profile: nightly mail spool + Nextcloud data + Mattermost DB + Onlyoffice config

Why hosters sell this

This is the highest-revenue, highest-retention stack in the productivity category. Microsoft 365 Business Standard is $12.50/user/mo = $250/mo for 20 users. Your offer at $89/mo flat-rate wins on cost and on sovereignty.

Common resale shape:

  • Small team tier — 10-30 users, single VPS, full stack
  • Mid-size tier — 30-100 users, larger VPS, dedicated mail handling
  • Enterprise tier — 100-200 users, dedicated infra, dedicated DPO contact, named SLA

Stack retail pricing is set by the hoster. See the suggested retail hint on this page as starting anchor; refer to bluix.net/bluixapps.php for the Bluix module license layer.

Compliance profile

  • All communication + files stay on the VPS — no Microsoft/Google/Slack telemetry
  • Email DKIM/SPF/DMARC properly configured for deliverability + anti-spoofing
  • EU GDPR clean — full data residency, audit log, right-to-be-forgotten
  • DPA-ready for processor ↔ controller relationship
  • Eligible for EU Public Sector procurement — open-source stack, audit-friendly, sovereign
Read this stack's deep dive on bluix.app ↗

Deploy this stack on any BluixApps plan

Same catalog. Scaling tenant isolation, white-label and support tier.

TierTenantsCatalogSupportWhite-labelMonthly
Stacks119 curated stacksStandard$19/moDetailDeploy
Starter10Full catalogStandard+$15–25/mo$49/moDetailDeploy
Pro25Full catalogPriority bugfix+$15–25/mo$149/moDetailDeploy
Growth100Full catalogPriority bugfix+$15–25/mo$349/moDetailDeploy
Scale500Full catalog7-day window+$15–25/mo$799/moDetailDeploy
EnterpriseUnlimitedFull catalogPriority 7-dayBundled$1,499/moDetailDeploy

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