# 3 Best Open-Source Alternatives to OnlyOffice in 2026

By Noah — last updated & pricing verified September 15, 2026.

> 3 of the 5 OnlyOffice alternatives we list qualify for this filter. The [full list](https://findalternative.to/onlyoffice) is the canonical page.

| Alternative | Best for | Price | Details |
| --- | --- | --- | --- |
| LibreOffice | individuals, schools, and organizations that want a full office suite without a subscription and can work without native real-time cloud co-authoring | Free | https://findalternative.to/libreoffice/about |
| Nextcloud | organizations that want a self-hosted, data-sovereign alternative to Google Workspace or Microsoft 365 for file sync, groupware, and video conferencing | Free | https://findalternative.to/nextcloud/about |
| Collabora Online | organizations that need on-premise, self-hosted document collaboration (data residency, compliance, or Nextcloud/ownCloud integration) instead of Google Workspace or Microsoft 365 SaaS | Free tier · paid from $3.40/mo | https://findalternative.to/collabora-online/about |

All 5 alternatives to OnlyOffice: https://findalternative.to/onlyoffice

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Markdown mirror of https://findalternative.to/onlyoffice/open-source — findalternative.to, honestly ranked software alternatives. AI info: https://findalternative.to/ai