The free Community Edition RBAC includes 3 default roles. More Custom Roles are available in the Enterprise Edition: unlimited custom roles in the Bronze, Silver, and Gold plans.
The Bronze is available for free to students, open-source, and non-profits.
Create roles that match your internal organisation. Assign the role to different people, modify the permissions of each role at any time. With custom roles, your team members have access to the content they need, not more, not less.
You can configure permissions for any operation on any field of any content type. Your data is completely secure and you minimize the risk of data breach or leakage.