Spreadsheet.com

If you're already comfortable with spreadsheets, then Spreadsheet.com is perfect for you. It offers all the usual spreadsheet features, plus over 25 different cell data types, file attachments for cells, and interconnected worksheets, almost like a database. Furthermore, you can use it to gather data with forms and manage projects with built-in tools such as Kanban and Gantt views. All of this is updated in real-time and comes with a messaging feature. Additionally, there is a no-code workflow editor that lets you automate and integrate with other tools, like Slack, Microsoft Teams, Gmail, and Mailchimp, without leaving your spreadsheet.