What are some alternatives?
When comparing Apigee and Kong, 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.
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.
Tyk - Tyk is an open-source API gateway and API management platform.
Paw - Paw is a REST client for Mac.
MuleSoft Anypoint Platform - Anypoint Platform is a unified, highly productive, hybrid integration platform that creates an application network of apps, data and devices with API-led connectivity.