Mendix Platform pricing is based on how many app users you have, not the complexity of your apps or number of developers. A per-user pricing model enables an unrestricted development process and a predictable budget, resulting in apps that are created with quality, rather than cost, first in mind.
The Mendix Free Edition includes everything you need to design, build, and deploy demos, prototypes, or small applications. It includes a deployment environment for each application that provides access to up to 10 internal users, and includes backups, monitoring, live debugging, REST support, deep-linking, and more. Just sign up, get started right away, and build as many applications as you want.