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Open source alternatives to Microsoft Office 365

We track 5 open-source Microsoft Office 365 alternatives, of which 2 currently score 70 or above on Repoly's GitHub health scale and 2 ship a Docker image. Nextcloud leads on health at 88/100 with 1960 commits in the last 90 days; across all 5 projects you are choosing between AGPL-3.0, GPL-2.0, MPL-2.0.

5
Alternatives
52k
Combined stars
3,177
Commits / 90 days
2
With Docker
Licence family Licence

Showing 5 of 5 tools

All 5 Microsoft Office 365 alternatives, ranked by health

  • Top pick · highest health

    Nextcloud

    88 GOOD

    Access and share your files, calendars, contacts, mail and [more](https://apps.nextcloud.com/) from any device, on your terms.

    ★ 37k · ⟳ today · v32.0.15 · AGPL-3.0

    PHPdeb
    Website ↗ Source ↗

  • egroupware

    80 GOOD

    Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.

    ★ 296 · ⟳ today · 26.9.20260907 · GPL-2.0

    PHP
    Website ↗ Source ↗

  • ONLYOFFICE

    63 SLOWING

    Office suite that enables you to manage documents, projects, team and customer relations in one place.

    ★ 6.9k · ⟳ 2 months ago · v9.4.0 · AGPL-3.0

    DockerNodejs
    Website ↗ Source ↗

  • CryptPad

    61 SLOWING

    Collaboration suite built to enable collaboration, synchronizing changes to documents in real time.

    ★ 7.9k · ⟳ 3 days ago · 2026.5.1 · AGPL-3.0

    DockerNodejs
    Website ↗ Source ↗

  • Collabora Online Development Edition

    10 STALE

    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.

    MPL-2.0

    C++
    Website ↗ Source ↗

Microsoft Office 365 alternatives: common questions

What is the most maintained open source alternative to Microsoft Office 365?

Nextcloud scores highest at 88/100, with 1960 commits in the last 90 days, 37k GitHub stars and its latest release (v32.0.15) published 4 days ago. It is also the most active by raw commit count.

Which Microsoft Office 365 alternatives use a permissive licence?

1 of 5 are permissively licensed (MIT, Apache, BSD or similar): Collabora Online Development Edition (MPL-2.0). 4 use copyleft licences such as GPL or AGPL, which require you to publish changes if you distribute a modified version.

Which Microsoft Office 365 alternatives run in Docker?

2 of 5 publish a Docker image or Compose file: ONLYOFFICE, CryptPad. Docker support contributes 10 of the 100 available health points, because it is the clearest signal that self-hosting is a supported path rather than an afterthought.