The Business Model Navigator is a good source of inspiration based on research into categorisations of business models that enables you to explore 55 basic business models that can be used on their own or in combination with each other. It comprises four main areas:

• Who? The target for the solution
• What? The solution itself
• How? Creation and delivery of the solution
• Why? Creation of revenue

An unpublished review of the 55 business models by Gray Dot Catalyst found that only a few are currently used in the humanitarian sector but over 30 of the models have potential for adaptation and use by humanitarian organisations.