Zod

Zod's ecosystem is relatively new, leading to fewer third-party plugins and integrations compared to more mature validation libraries like Joi.

Validating complex or deeply nested schemas can introduce significant performance overhead, which may be noticeable in high-throughput applications.

Zod leverages some of the most advanced features of TypeScript (like conditional types and mapped types), which can be challenging for developers who are not deeply familiar with these concepts.

As a relatively new tool, Zod has a smaller community compared to more established validation libraries. This can result in fewer resources and slower response times for issues and feature requests.