What are some alternatives?
When comparing Mmock and Apigee, you can also consider the following products
Postman - The Collaboration Platform for API Development
Paw.cloud - Paw is a REST client for Mac.
Gravitee.io - Gravitee.io is a flexible, lightweight and an open source API management solution.
Runscope - Log, monitor and measure your API usage to solve API problems fast.
WSO2 API Manager - WSO2 API Manager is a 100% open source enterprise-class solution that supports API publishing, lifecycle management, application development, access control, rate limiting and analytics in one cleanly integrated system.
soapUI - SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.