I've used OnlyOffice for a long time, and it just got a huge upgrade - for free
Briefly

OnlyOffice stands out as a versatile office suite often overlooked in favor of more prominent brands. It can be utilized locally or in the cloud, with simultaneous document access an appealing feature. The recent version 9 introduces enhancements, including AI capabilities, allowing users to create macros from prompts and perform extensive data analysis in spreadsheets. Additionally, features like extracting text from scanned PDFs and converting VBA macros enhance its functionality. Overall, OnlyOffice presents a robust solution at no cost.
OnlyOffice provides a versatile office suite that allows users to work both locally and in the cloud simultaneously, making it an attractive option for many.
With the release of version 9, OnlyOffice introduced significant features such as the ability to extract text from scanned PDF files and apply smart formulas in spreadsheets.
Read at ZDNET
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