Caisy.io is a excellent choice for any organization looking for a robust and adaptable headless CMS solution. Despite my relatively limited experience with headless CMS development, it felt easy to use. Even though it is a new entrant in the field, it already offers a broad spectrum of features. What differentiates Caisy.io from seasoned players in the headless CMS market like Sanity and Contentful is its unique multi-tenancy approach to site management. This is particularly beneficial for agencies, as it streamlines operations by allowing efficient management of multiple sites under one roof. Moreover, Caisy's team is exceptionally friendly and accommodating, which is good to know when starting any bigger project.

Pros
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- User-friendly interface
- Aesthetically pleasing and intuitive UI
- Multilingual content support
- Highly customizable content models, called 'blueprints'
- The multi-tenancy feature, ideal for managing multiple sites for agencies
- Features well-thought through cms tools
- Great image editor
- Flexible and affordable pricing, should you require more than the LTD limits
- Great customer support
- GraphQL (Yeay)

Cons
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- The documentation could be more comprehensive; a few features seem less well-documented than others
- The learning curve can be steep for some users
- Given its startup status, the user community is still growing and hence relatively limited (yet the core team is quick to respond to any questions)
- Lacks a standalone REST API
- More starter templates would be great