Neither Napkin nor HackerPen offers a free trial.
Napkin is designed for Individuals, Medium Business and Small Business.
HackerPen is designed for Large Enterprises, Medium Business and Small Business.
The starting price of HackerPen begins at $41.66/Month when Billed Yearly, 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 HackerPen includes PaizaCloud, AWS Cloud9, CodeinCloud, CodeOnline, Qualified, Workvivo, WebTool, CodeSee, CoderPad, Interview Sandbox, IFTTT and Codidate.