Online Check Writer offers Free Trial, but FlightAPI does not.
FlightAPI is designed for Large Enterprises, Medium Business and Small Business.
Online Check Writer is designed for Medium Business and Small Business.
Pricing for FlightAPI Starts at $49/Month whereas for Online Check Writer Starts at $1Pay As You Go.
Some top alternatives to FlightAPI includes TraviYo, Softrip, TripIt, Duffel, Airportal, Qualified, Workvivo, Flyfi, IFTTT, Online Check Writer and Siesta Cloud.
Some top alternatives to Online Check Writer includes CheckWriters, CloudBooks, Checkflo, Checkrun, CPE Cloud, Qualified, Workvivo, ScanWriter, IFTTT, Supermetrics and Drag.