Question: Is there an open-source solution that offers a range of features for writing, drawing, and planning, with scalable pricing options for individuals and teams?

For an open-source alternative that offers a broad range of tools for writing, drawing and planning, take a look at AFFiNE. It brings together the abilities of docs, whiteboards and databases into one tool, and AI-powered tools to spark your creativity and get you productive. AFFiNE offers unlimited local workspaces, customization and collaboration, with flexible pricing that includes a free tier and plans that scale up for larger teams.

Another good option is Taskade, an AI-powered productivity tool that offers a single workspace for tasks, research and collaboration. It comes with customizable AI agents, project assistants and workflow generators to help you get more done. Taskade offers real-time collaboration tools and AI-powered writing and task help, and offers a free plan and two paid options, including a custom Team option for larger teams.

If you're looking for a powerful tool for document collaboration, Bit.ai is worth a look. It lets you create, collaborate and share documents, notes and wikis with advanced design abilities and powerful search. Bit.ai offers AI-boosted writing, interactive living documents and real-time collaboration, and is good for teams that need a more serious knowledge management system. The service offers flexible pricing options, including a free tier and enterprise deals.

For visual planning and organization, Whimsical offers a full-featured workspace with tools to create docs, flowcharts, wireframes and mind maps. It's designed for iterative work, with real-time collaboration and a range of pricing options for different team sizes, including a free plan and a pro plan at $10/month per editor.