Excel Online, part of Office Online, is the online version of Microsoft Excel.

LibreOffice - Calc is described as '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' and is a leading Spreadsheet app in the office & productivity category. There are more than 50 alternatives to LibreOffice - Calc for a variety of platforms, including Windows, Web-based, Linux, Mac and Android apps. The best LibreOffice - Calc alternative is Microsoft Excel. It's not free, so if you're looking for a free alternative, you could try Proton Sheets or Google Sheets. Other great apps like LibreOffice - Calc are Grist, IronCalc, Gnumeric and Numbers.
Excel Online, part of Office Online, is the online version of Microsoft Excel.

PlanMaker is a Microsoft Excel-compatible spreadsheet, part of SoftMaker FreeOffice, that opens all your Excel workbooks directly and gives you many time-saving features.

Luckysheet is an online spreadsheet like excel that is powerful, simple to configure, and completely open source.This site contains official configuration document, API, and tutorial.

Experience collaborative spreadsheets featuring real-time editing, AI-assisted analysis with over 350 functions, data automation tools, and seamless integration with over 1,000 apps. Enhanced security settings, a robust audit trail, and advanced visualization options cater to diverse data analysis needs.


Zen gives you all the missing tools you never knew you wanted in Google Sheets. Zen is an overlay that adds SQL-like capabilities to Google Sheets.

Aspose.Cells for Cloud is a REST based API for processing spreadsheets in the cloud. It allows creating, manipulating and converting spreadsheets in your web, desktop, mobile and cloud applications. It supports rows, columns, cells, text, data, images, hyperlinks, comments...

Open source framework for numerical computations and advanced statistical analysis, featuring nonlinear curve fitting, ODE solving, 1D/2D publication-quality visualization, Fourier and wavelet transforms, intuitive syntax, and namespace-based code organization for research.








Calligra Sheets is a fully-featured calculation and spreadsheet tool. Use it to quickly create and calculate various business-related spreadsheets, such as income and expenditure, employee working hours, etc.

Spreadsheet syncs with databases and business applications, enabling access to live business data, custom reporting, visualization, and analytics for various roles such as operators, marketers, analysts, and sales teams, including integrations with popular tools.


Flexmonster Pivot is a feature-rich JavaScript library for web reporting. The component connects to any data source and perfectly visualizes data from MongoDB, Elasticsearch, OLAP cubes, SQL, NoSQL databases, or JSON / CSV files up to 1GB.

Keikai is the only Web Spreadsheet designed and architected for big data — and is the fastest web spreadsheet regardless of size. Other advanced features include embeddable in your Web Apps, providing true Excel experiences and more.


