Best Self-Hosted Microsoft 365 Alternatives in 2026
Microsoft 365 is a productivity suite with Word, Excel, PowerPoint, Outlook, Teams, and cloud storage for business and personal use.
7 Self-Hosted Alternatives to Microsoft 365
CryptPad
7.4KCryptPad gives you collaboration suite offering encrypted document editing on your own infrastructure.
Tuta
7.4KTuta is a self-hosted privacy & encryption tool with support for privacy, security, email.
ONLYOFFICE
6.4KONLYOFFICE is a self-hosted office suites tool with support for collaboration, spreadsheet, node.
Papra
4KSelf-hosted document management tool that provides document management platform.
LibreOffice
3.8KSelf-hosted communication & messaging tool that provides complete office suite compatible.
Colabora Online
3.1KColabora Online lets you run powerful online document editor entirely on your own server.
Sogo
2.1KSogo handles scalable groupware with calendars, contacts, and email as a self-hosted solution.
Why Look for Microsoft 365 Alternatives?
Microsoft 365 is a productivity suite with Word, Excel, PowerPoint, Outlook, Teams, and cloud storage for business and personal use.
Self-hosted alternatives give you full data ownership, predictable costs, and zero vendor lock-in. You run the software on your own infrastructure and control everything.
7 Best Open-Source Alternatives to Microsoft 365
CryptPad
Encrypted and open source collaboration suite — 7,422 GitHub stars. Licensed under AGPL-3.0.
Tuta
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking. — 7,373 GitHub stars. Licensed under GPL-3.0.
Papra
Minimalistic document management platform — 4,014 GitHub stars. Licensed under AGPL-3.0.
LibreOffice
LibreOffice: Free, open-source office suite. — 3,738 GitHub stars. Licensed under GPL-3.0.
ONLYOFFICE
Collaborative online office suite for documents. — 6,338 GitHub stars. Licensed under AGPL-3.0.
Colabora Online
Full-featured, collaborative document editing solution. — 3,061 GitHub stars. Licensed under Open Source.
Read full Colabora Online review
Sogo
Scalable groupware with calendars, contacts, and email. — 2,092 GitHub stars. Licensed under GPL-2.0.
Why Self-Host Instead of Microsoft 365?
- Data ownership. Your data stays on your server, not on Microsoft 365’s infrastructure.
- Predictable costs. Pay a fixed VPS cost instead of growing per-user or per-usage fees.
- No vendor lock-in. Export and migrate your data anytime. You control the database.
- GDPR and compliance. Hosting your own tools simplifies data residency and compliance requirements.
Why teams switch from Microsoft 365
- → Data ownership. Your data stays on your server -- not on Microsoft 365's infrastructure.
- → Predictable costs. Pay a fixed VPS cost instead of growing per-user or per-usage fees.
- → No vendor lock-in. Export and migrate your data anytime. You control the database.
- → GDPR and compliance. Hosting your own tools simplifies data residency and compliance requirements.
Browse more File Management & Sharing tools
Explore 133 open-source file management & sharing tools you can self-host.
View File Management & Sharing →