i2Rest Server and IBM IWS

i2Rest Server functionality is very similar to IBM Integrated Web Services. Both products allow you to turn RPGLE programs into services without modifications. However, the i2Rest Server is an independent product that differs significantly from the IBM IWS
In short, there are two main differences:

• Full support of OAuth2 authorization flows
• Higher performance

These differences are shown in more detail in the table below.

	i2Rest Server	IBM Integrated Web Services
Architecture & implementation details
Server engine	Native implementation of high performant multi threaded HTTP(s) web server (based on gSOAP toolkit)	IBM HTTP(s) Server for IBM i, based on Apache Tomcat
Development language	IBM ILE C	Java
OpenAPI specification support	2.0 (swagger), 3.0 (OpenAPI)	2.0 (swagger)
User authentication	None, OAuth2 token (Bearer), HTTP Basic, SSL certificate	None, HTTP Basic
User authorization	Provided by OS + OAuth2 scopes or custom authorization model	Provided by OS
Supported OAuth2 flows	Authorization code, Client credentials, Refresh token, Device code	None
Performance
TPS (transactions per second)	1263	326
Memory consumption	34mb, 51 mb in peak	224 mb, 436mb in peak