Top 5 Open-Source Alternatives to Open365

Open365

The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE.

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Product categories

Calendar Email Email Clients Email Service Enterprise Communication Note Taking Office & Productivity Office Suites Office Tools Project Management Software Development

Summary

The top open-source alternatives to Open365 are LibreOffice, Apache OpenOffice, and CryptPad. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

LibreOffice Landing Page
1

LibreOffice

Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Pricing:
- Open Source
#Project Management #Office Tools #Office Suites 15 social mentions
Apache OpenOffice Landing Page
2

Apache OpenOffice

Apache OpenOffice is an open source, office document productivity suite.
Pricing:
- Open Source
#Software Development #Project Management #Office Suites 13 social mentions
CryptPad Landing Page
3

CryptPad

CryptPad is a collaborative office suite that is end-to-end encrypted and open-source.
Pricing:
- Open Source
- Freemium
- Free Trial
- €5.0 / Monthly (Personal 5GB)
#Project Management #Office Suites #Note Taking 91 social mentions
Spark Mail Landing Page
4

Spark Mail

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Pricing:
- Open Source
#Email #Calendar #Email Clients 30 social mentions
Mailspring Landing Page
5

Mailspring

Mailspring is a mail client for Mac, Windows and Linux.
Pricing:
- Open Source
#Email #Calendar #Enterprise Communication 25 social mentions