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3 Best Open-Source Alternatives to Microsoft Excel (2026)

Last checked October 2026 · 6 alternatives to Microsoft Excel in our catalog

People look for an open-source alternative to Microsoft Excel to cut cost or avoid lock-in. Below are 3 open-source options you can inspect, modify and often self-host - 2 are completely free, 3 run on Linux and 1 works in the browser.

Quick picks

Picked from listing data (price model, license, platforms, community votes), not hands-on testing.

Microsoft Excel alternatives compared

AlternativePriceOpen sourcePlatformsWhat it is
Apache OpenOfficeFreeYes (Apache-2.0)Windows, macOS, LinuxFree, open-source office suite with Writer, Calc and Impress
LibreOfficeFreeYesWindows, Mac, LinuxFree, open-source office suite for documents, spreadsheets, and presentations
OnlyOfficeFreemiumYes (AGPL-3.0)Web, Windows, Mac, LinuxSecure online office suite fully compatible with MS Office formats
1
Apache OpenOffice

Apache OpenOffice

FreeOpen source · Apache-2.0WindowsmacOSLinux

Free, open-source office suite with Writer, Calc and Impress

  • Completely free and open source
  • Opens .docx, .xlsx and .pptx as well as OpenDocument files
  • No account or subscription
  • Slower development than LibreOffice
  • Dated interface
2
LibreOffice

LibreOffice

FreeOpen sourceWindowsMacLinux

Free, open-source office suite for documents, spreadsheets, and presentations

  • Completely free with no hidden costs
  • Runs on Windows, macOS, and Linux
  • High compatibility with Microsoft Office files
  • User interface feels dated compared to some commercial suites
  • Limited native cloud collaboration features
3
OnlyOffice

OnlyOffice

FreemiumOpen source · AGPL-3.0WebWindowsMacLinux

Secure online office suite fully compatible with MS Office formats

Free plan includes: Access to ONLYOFFICE Docs online editors · Basic collaboration tools (view, edit, comment) · Limited storage and user count · Integration with popular services (Box, Moodle, Nextcloud, Odoo, WordPress, etc.)

  • High fidelity with Microsoft Office formats
  • Both cloud and self‑hosted options
  • Robust permission and security controls
  • User interface can feel less polished than some commercial rivals
  • Advanced features may require paid enterprise license

Frequently asked questions

What is the best free alternative to Microsoft Excel?

Apache OpenOffice is the first free alternative we list for Microsoft Excel and has no paid tier. Others worth a look: LibreOffice and OnlyOffice. Which one fits depends on what you use Microsoft Excel for, so check the platform and free-plan details for each.

Is there an open-source alternative to Microsoft Excel?

Yes: Apache OpenOffice, LibreOffice and OnlyOffice. Open-source options can usually be inspected, modified and self-hosted.

Does Microsoft Excel have a free plan?

Yes. The free plan includes Create and edit workbooks in the browser, Real-time co-authoring and Requires a free Microsoft account.

How this list is built: alternatives come from our catalog's curated alternative relationships; price model, license and platforms come from each product's listing; order is fully-free first, then community votes.