You will have to upgrade to a paid versions to make them private. If you need to use them in a team, you will have to pay for a team license.
All of these apps only allow free use for individuals.It’s important to be aware that all free diagramming software come with some serious catches which do not make them suitable for professional use unless you upgrade to the paid versions: Why We Don’t Recommend These Free Tools For Professionals Is Visio Online A Free Visio Alternative For Mac?.Why We Don’t Recommend These Free Tools For Professionals.