What are some alternatives?
When comparing Apigee and WSO2 API Manager, you can also consider the following products
Postman Collections - Biggest library of ready-made API collections for Postman
Gravitee.io - Gravitee.io is a flexible, lightweight and an open source API management solution.
Tyk - Tyk is an open-source API gateway and API management platform.
Paw - Paw is a REST client for Mac.
Amazon API Gateway - Create, publish, maintain, monitor, and secure APIs at any scale
Kong - An open-source management layer for APIs and microservices.