Open Source Excel Online AlternativesSpreadsheet Apps like Excel Online

The best open source alternative to Excel Online is ONLYOFFICE. If that doesn't suit you, our users have ranked more than 25 alternatives to Excel Online and 15 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Excel Online are LibreOffice - Calc, Proton Sheets, IronCalc and EtherCalc.

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Excel Online alternatives page was last updated Dec 4, 2025

ONLYOFFICE
660 likes
Open-source office suite offering document, spreadsheet, and presentation editing with co-editing modes, plugin support, integration across 30+ services, robust security, and mobile access. Available in Community, Enterprise, and Home Server editions for versatile deployment.
79 ONLYOFFICE alternatives
Cost / License
Free
Open Source (AGPL-3.0)
Application types
Word Processor
Spreadsheet
Origin
Latvia
EU
Platforms
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
HUAWEI AppGallery
iPad
Self-Hosted
AppImageHub
Snapcraft
Flathub
Samsung Galaxy Store
Software as a Service (SaaS)
Flatpak
Cloudron
+7
Is ONLYOFFICE a good alternative to Excel Online?

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1comment
ONLYOFFICE vs Excel Online Comments

Guest
Positive commentApr 10, 2024
0
An opensource alternative to Office365 that supports all the same features and the native formats. It has optional paid cloud/online support that includes collaborative real-time editing, though the service is not end-to-end-encrypted.
Review by a new / low-activity user.
ONLYOFFICE is Free and Open SourceExcel Online is Free and Proprietary
ONLYOFFICE is Privacy focusedExcel Online is not according to our users
LibreOffice - Calc
605 likes
LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.org Calc, professional data miners and number crunchers will appreciate its comprehensive range of advanced functions.
71 LibreOffice - Calc alternatives
Cost / License
Free
Open Source (MPL-2.0)
Application type
Spreadsheet
Origin
Germany
EU
Platforms
Mac
Windows
Linux
BSD
PortableApps.com
ReactOS
Flathub
Is LibreOffice - Calc a good alternative to Excel Online?

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1comment
LibreOffice - Calc vs Excel Online Comments

Guest
Positive commentMar 28, 2016
0
The only functionality that can't be replaced is the online collaboration - but is also in plan
Review by a new / low-activity user.
LibreOffice - Calc is Free and Open SourceExcel Online is Free and Proprietary
LibreOffice - Calc is Privacy focused and LightweightExcel Online is not according to our users
Proton Sheets
40 likes
End-to-end encrypted spreadsheets enabling secure business data management, real-time collaboration with access controls, data analysis with automatic functions and visual tools, integration with cloud storage, and cross-device workspace access for teams.
55 Proton Sheets alternatives
Cost / License
Freemium
Open Source (GPL-3.0)
Application types
Spreadsheet
Team Collaboration
Origin
Switzerland
Platforms
Online
+3
Is Proton Sheets a good alternative to Excel Online?
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Proton Sheets
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IronCalc
8 likes
The democratization of spreadsheets. Empowering everyone with advanced, open-source spreadsheet solutions.
Cost / License
Free
Open Source (Apache-2.0)
Application type
Spreadsheet
Platforms
Online
Self-Hosted
Is IronCalc a good alternative to Excel Online?
EtherCalc
48 likes
EtherCalc is a web spreadsheet. Your data is saved on the web, and people can edit the same document at the same time. Everybody's changes are instantly reflected on all screens. Work together on inventories, survey forms, list management, brainstorming sessions and more!
Cost / License
Free
Open Source
Application type
Spreadsheet
Alerts
Discontinued
Platforms
Online
Self-Hosted
Cloudron
Sandstorm
Is EtherCalc a good alternative to Excel Online?
Gnumeric
86 likes
The Gnumeric spreadsheet is part of the GNOME desktop environment: a project to create a free, user friendly desktop environment.
54 Gnumeric alternatives
Cost / License
Free
Open Source (GPL-3.0)
Application type
Spreadsheet
Origin
United States
Platforms
Linux
PortableApps.com
AmigaOS
GNOME
Flathub
Is Gnumeric a good alternative to Excel Online?
NeoOffice
47 likes
NeoOffice is an office suite for Mac that is based on OpenOffice and LibreOffice. With NeoOffice, you can view, edit, and save OpenOffice documents, LibreOffice documents, and simple Microsoft Word, Excel, and PowerPoint documents.
55 NeoOffice alternatives
Cost / License
Free
Open Source
Application types
Word Processor
Spreadsheet
Origin
United States
Alerts
Discontinued
Platforms
Mac
+1
Is NeoOffice a good alternative to Excel Online?
Apache OpenOffice Calc
121 likes
Calc, part of the Apache OpenOffice suite, is a spreadsheet application. It is similar to Microsoft Excel , with a roughly equivalent range of features.
63 Apache OpenOffice Calc alternatives
Cost / License
Free
Open Source
Application type
Spreadsheet
Origin
United States
Platforms
Mac
Windows
Linux
Is this a good alternative to Excel Online?
SC-IM
9 likes
SC-IM - Spreadsheet Calculator Improvised – An ncurses spreadsheet program for the terminal.
Cost / License
Free
Open Source
Application type
Spreadsheet
Origin
Argentina
Platforms
Mac
Linux
BSD
+3
Is SC-IM a good alternative to Excel Online?
MS-365-Electron
2 likes
MS-365-Electron streamlines your workflow by offering a dedicated desktop interface for the free, web-based version of Microsoft 365. Think of it as a convenient launchpad for web applications like Word, Excel, and PowerPoint, eliminating the need to navigate through browser...
Cost / License
Free
Open Source (MIT)
Origin
India
Platforms
Windows
Mac
Linux
Snapcraft
Is MS-365-Electron a good alternative to Excel Online?
mtCellEdit
2 likes
mtCellEdit is a lightweight spreadsheet program. It is a small, no frills program which is designed to handle simple day to day spreadsheet tasks.
Cost / License
Free
Open Source (GPL-3.0)
Application type
Spreadsheet
Origin
United Kingdom
Platforms
Linux
+2
Is mtCellEdit a good alternative to Excel Online?
SolidSheets
8 likes
SolidSheets offers a user-friendly interface and powerful features to manage and analyze your data. Easily open, edit, and print CSV, SSFS/SSFS64, and XLSX files. With advanced formulas, charts, and machine learning algorithms, accelerate your workflow.
Cost / License
Free
Open Source (GPL-3.0)
Application types
Spreadsheet
Office Suite
Origin
Türkiye
Platforms
Mac
Windows
Linux
Is SolidSheets a good alternative to Excel Online?