Caisy vs Obsidian Publish

Caisy is a headless CMS designed for speed and developer experience, offering a GraphQL API for content delivery. It provides a visual content editor, asset management, and multi-tenant workspace support.

Obsidian Publish is Hosting service that publishes Obsidian vaults as websites with graph view, search, and custom domains.. It is available under a paid model. This tool falls under the cms category.