Yes, both RepreZen API Studio and WSO2 API Manager offer a Free Trial.
RepreZen API Studio is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
WSO2 API Manager is designed for Large Enterprises, Medium Business and Small Business.
Pricing for RepreZen API Studio Starts at $22/Month when Billed Yearly whereas for WSO2 API Manager Starts at $2,000.
Some top alternatives to RepreZen API Studio includes Postman, WSO2 API Manager, SwaggerHub, Plus, APITree, Apitive Studio, Bump, Meta API, API Maker and Dapi.
Some top alternatives to WSO2 API Manager includes 3scale, Dell Boomi API Management, Apigee Edge, IBM API Connect, Kong, Tyk API Management Platform, WSO2 Identity Server, Meta API, Software AG webMethods, NextGen Healthcare EHR, NextGen Enterprise and NextGen Office.