What are some alternatives?
When comparing Sketchboard.io and Miro, you can also consider the following products
Walling - Walling is your visual space to capture ideas and organize projects.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Jamboard - Interactive Business Whiteboard | G Suite
Samepage - Samepage facilitates communication, project management, meetings, online collaboration, and more by combining team chat, video calling, screen sharing, task management, and real-time team document collaboration in a single collaborative workspace.
DrawAttention - A whiteboard for you laptop lid
monday.com - The most intuitive platform to manage projects and teamwork