[opensourcedex]

best-of ranking · updated nightly

Best Open Source Office Suites Tools

Ranked by GitHub stars — actual adoption, not editorial taste. All 5 are free, open source and self-hostable; license and last activity on every entry.

  1. 1
    CryptPad ★ 7.9K

    Secure collaboration with end-to-end encryption

    AGPL-3.0 JavaScript pushed 2026-09-17 details →
  2. 2
    ONLYOFFICE Docs ★ 6.9K

    Complete office suite for documents, spreadsheets & more

    AGPL-3.0 Shell pushed 2026-07-22 details →
  3. 3
    LibreOffice ★ 4.4K

    Free office suite with Microsoft compatibility

    GPL-3.0 C++ pushed 2026-09-17 details →
  4. 4
    IronCalc ★ 4.2K

    A spreadsheet engine you can embed, self-host, or run in the browser

    Apache-2.0 Rust pushed 2026-09-17 details →
  5. 5
    Collabora Online ★ 3.4K

    Open-source document editing suite for secure collaboration

    NOASSERTION Shell pushed 2026-09-17 details →
method stars desc · snapshot from github api refresh nightly related Input & Dictation, Email & Communication, Password & Secret Management, Design & Visualization, Time & Task Management, System Cleanup & Optimization

Related best-of lists

best Input & Dictation →best Email & Communication →best Password & Secret Management →best Design & Visualization →best Time & Task Management →best System Cleanup & Optimization →

last updated nightly · ranking method: github stars, live-tracked

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Frequently asked questions

What is the best open source Office Suites tool in 2026?

CryptPad leads the ranking with 7,920 GitHub stars, ahead of ONLYOFFICE Docs. Rankings use live GitHub star counts, refreshed nightly.

How is this list of Office Suites tools ranked?

By GitHub stars — a proxy for adoption and community size. Each entry also shows its licence, primary language and last commit date, so you can judge maintenance activity rather than trusting the ranking alone.

Are the best Office Suites tools free?

Every project on this list is open source and free to self-host. Some also offer paid managed hosting, but the software itself carries no licence fee.