ZK Spreadsheet is described as 'Google Spreadsheet like collaborative online spreadsheet. Unlike Google Spreadsheet, ZK Spreadsheet can be self-hosted in-house and easily installed in just a few clicks' and is a Spreadsheet in the Office & Productivity category. There are more than 25 alternatives to ZK Spreadsheet for a variety of platforms, including Windows, Online / Web-based, Mac, Linux and iPad. The best alternative is LibreOffice - Calc, which is both free and Open Source. Other great apps like ZK Spreadsheet are CryptPad (Freemium, Open Source), Microsoft Office Excel (Paid), Google Drive - Sheets (Free) and EtherCalc (Free, Open Source).
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.
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
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!
Create gorgeous spreadsheets with Numbers for Mac. Get started with one of many Apple-designed templates for your home budget, checklist, invoice, mortgage calculator, and more. Add tables, charts, text, and images anywhere on the free-form canvas.