Certainly! Here are some of the best open-source office solutions that compete with Google Sheets and Excel:

1. LibreOffice Calc: LibreOffice is a popular open-source office suite that includes Calc, a spreadsheet program similar to Excel and Google Sheets. Calc offers a wide range of features, including advanced formulas, data analysis tools, charting, pivot tables, and compatibility with various file formats. It provides a familiar interface for users transitioning from Excel.

2. Apache OpenOffice Calc: Apache OpenOffice is another open-source office suite that features Calc as its spreadsheet application. Calc provides basic spreadsheet functionality, including formulas, charting, data analysis, and compatibility with Excel file formats. While it may not have as many advanced features as Excel, it serves as a reliable open-source alternative.

3. OnlyOffice: OnlyOffice is an open-source office suite that offers a comprehensive set of applications, including a spreadsheet program called OnlyOffice Spreadsheet. OnlyOffice Spreadsheet provides essential features for data management, calculations, charts, and collaboration. It supports various file formats, including Excel files.

4. Calligra Sheets: Calligra Suite is an open-source office suite that includes Sheets, a spreadsheet application similar to Excel and Google Sheets. Calligra Sheets provides basic spreadsheet functionality, including formulas, charting, and pivot tables. It offers a user-friendly interface and is part of the KDE software ecosystem.

5. Gnumeric: Gnumeric is a lightweight and fast open-source spreadsheet application designed for data analysis and manipulation. It provides a wide range of functions, statistical analysis tools, and support for large datasets. Gnumeric emphasizes accuracy and computational performance.

These open-source office solutions compete with Google Sheets and Excel by offering comparable functionality, compatibility with common file formats, and the advantage of being free and open-source. While they may not have the exact same features or level of refinement as commercial solutions, they provide viable alternatives for individuals or organizations seeking open-source software options.

It's important to evaluate these solutions based on your specific requirements and preferences to determine which one best suits your needs.

Compatibility with Excel file formats may vary between open-source solutions, and it's advisable to test and verify the compatibility for your specific files before transitioning.
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