20 alternatives to Microsoft 365
Microsoft 365 is a Office Suites product. The community recommends 20 alternatives: 20 open source, 20 self-hostable and 20 free to use. They are ranked by community votes, ratings and favorites, with the key differences from Microsoft 365 highlighted.
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About Microsoft 365
Microsoft's subscription productivity suite with Word, Excel, PowerPoint, Outlook, Teams and OneDrive storage.
Quick picks
All alternatives
- 0
The open source Enterprise Content Management software that handles any type of content, allowing users to easily share and collaborate on content.
Open source · LGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
TinyCld is a self-hosted workspace alternative with an Expo app shell, PocketBase backend, and separately installable feature packages for mail, calendar, drive, and more.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader).
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Collabora Online Development Edition (CODE) is a powerful LibreOffice-based online office that supports all major document, spreadsheet and presentation file formats, which you can integrate in your own infrastructure.
Open source · MPL-2.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Collaboration suite built to enable collaboration, synchronizing changes to documents in real time.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.
Open source · GPL-2.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.
Open source · busl-1-1, MPL-2.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Free, open-source AI Office suite: Docs, Sheets, Slides, PDF, Markdown and HTML editors with a built-in AI agent, plus a `genoffice` CLI and agent skill so Claude Code, Codex and Cursor can create and edit real .docx/.xlsx/.pptx files locally. Bring your own key. macOS, Windows & Linux.
Open source · Apache-2.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Turns any Ubuntu server into a fully functional mail server with one command.
Open source · CC0-1.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Nextcloud preinstalled and preconfigured, with a text and web management interface and all the tools needed to self host private data. With installation images for Raspberry Pi, Odroid, Rock64, Docker, and a curl installer for Armbian/Debian.
Open source · GPL-2.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Office suite that enables you to manage documents, projects, team and customer relations in one place.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.
Open source · LGPL-2.1Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Software for digital collaboration in companies and organizations. From powerful groupware functionalities to clever add-ons, tine combines everything to make daily team collaboration easier.
Open source · AGPL-3.0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
- 0
Email, calendar, collaboration server with Web interface and lots of integrations.
Open source · GPL-2.0, cpal-1-0Self-hostableCompared with Microsoft 365
- + Open source (Microsoft 365 is not)
- + Self-hostable (Microsoft 365 is not)
- + Free to use (Microsoft 365 is paid)
Microsoft 365 vs. alternatives
| Service | Open source | Self-hosted | License | Pricing | Platforms | Rating | Votes |
|---|---|---|---|---|---|---|---|
| Microsoft 365 Current | No | No | proprietary | Subscription | Web / Windows / macOS / iOS / Android | — | — |
| Alfresco Community Edition | Yes | Yes | LGPL-3.0 | — | — | — | 0 |
| app | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| bewCloud | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Collabora Online Development Edition | Yes | Yes | MPL-2.0 | — | — | — | 0 |
| CryptPad | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| egroupware | Yes | Yes | GPL-2.0 | — | — | — | 0 |
| Forward Email | Yes | Yes | busl-1-1, MPL-2.0 | — | — | — | 0 |
| genoffice | Yes | Yes | Apache-2.0 | — | — | — | 0 |
| Group Office | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Mail-in-a-Box | Yes | Yes | CC0-1.0 | — | — | — | 0 |
| Modoboa | Yes | Yes | ISC | — | — | — | 0 |
| Nextcloud | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| NextCloudPi | Yes | Yes | GPL-2.0 | — | — | — | 0 |
| ONLYOFFICE | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Overleaf | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Sandstorm | Yes | Yes | Apache-2.0 | — | — | — | 0 |
| SOGo | Yes | Yes | LGPL-2.1 | — | — | — | 0 |
| Stalwart Mail Server | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Tine | Yes | Yes | AGPL-3.0 | — | — | — | 0 |
| Zimbra Collaboration | Yes | Yes | GPL-2.0, cpal-1-0 | — | — | — | 0 |
FAQ
What is the best alternative to Microsoft 365?
Community-recommended alternatives to Microsoft 365 include Alfresco Community Edition, app, bewCloud, Collabora Online Development Edition, CryptPad, and egroupware. Compare open source, self-hosting, pricing and platforms to choose.
Is there a free alternative to Microsoft 365?
Yes. Alfresco Community Edition, app, bewCloud, Collabora Online Development Edition, CryptPad, and egroupware can be used for free; the open-source, self-hostable ones can be run on your own server at no cost.
Is there an open-source alternative to Microsoft 365?
Yes. Open-source alternatives include Alfresco Community Edition, app, bewCloud, Collabora Online Development Edition, CryptPad, and egroupware.
Can I self-host an alternative to Microsoft 365?
Yes. Alfresco Community Edition, app, bewCloud, Collabora Online Development Edition, CryptPad, and egroupware can run on your own server, so you keep control of your data.
Other Office Suites services
Services in the same category that haven't been suggested as Microsoft 365 alternatives yet. If one fits, add it as an alternative.
- GWGoogle Workspace
Google's business productivity suite with Gmail on a custom domain, Docs, Sheets, Slides, Drive, Calendar and Meet.
- Digislides
Create multimedia presentations in a quick and easy way. (documentation in French).
Open sourceSelf-hostable - Etherpad
Highly customizable online editor providing collaborative editing in real-time.
Open sourceSelf-hostable - Grist
Next-generation spreadsheet with relational structure, formula-based access control, and a portable, self-contained format (alternative to Airtable).
Open sourceSelf-hostable - PPHPOffice
PHPOffice contains libraries which permits to write and read files from most office suites.
Know another Microsoft 365 alternative?
Once added, the community can vote and the best suggestions rise to the top.