Obsidian Canvas is definitely local-first. You don't need a cloud solution for obsidian. Obsidian is based on markdown files which are largely readable with a

Obsidian Canvas is definitely local-first. You don't need a cloud solution for obsidian. Obsidian is based on markdown files which are largely readable with a simple text editor. The obsidian canvas format is open source but I think the created it themselves. In the end, it's a JSON format that could be drawn with other tools as well.