Neither Napkin nor Yappes offers a free trial.
Napkin is designed for Individuals, Medium Business and Small Business.
Yappes is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of Yappes begins at $90/Month, while pricing details for Napkin are unavailable.
Some top alternatives to Napkin includes Apigee Edge, Verj.io, Yappes, Apitive Studio, API Fortress, Fireapis, HTTPie, Meta API, Kodingless and HackerPen.
Some top alternatives to Yappes includes Apigee Edge, Postman, WSO2 API Manager, Fireapis, Apinizer, Meta API, API Maker, APIToolkit and APImetrics.