Criteria	Automation for Jira	ScriptRunner for Jira	Jira Automation Plugin	Automation Tools for Jira
Available for Jira Server?
Available for Jira Cloud
License Costs	HIGH FOR UPPER USER TIERS	HIGH FOR UPPER USER TIERS	FREE	CHEAP
Vendor maturity	NEW	LARGE VENDOR	IT'S ATLASSIAN	NEW
Vendor background info	Ex-Atlassians, Creators of the free plugin	Backed by big vendor Adaptavist	By Atlassian	Unknown to us
Plugin evaluation	Very easy to use surface	Market leading solution, very versatile	Largely unmaintained	Largely a copy of free plugin
Market share / adoption	LOW	HIGH	HIGH	VERY LOW

Comparision fact sheet by Codebarrel

Some of their comments from an interview

• "The thing with ScriptRunner is that it can cover pretty much anything that's available through Jira's API (but it also lets you do scary things from a security/resource utilisation point of view). We aim to cover the majority of automation use-cases a team is faced with in Jira."

• "Switching from one to the other is difficult. We can't really write an 'importer' and admins would have to convert scripts to automation rules manually..."

• "Recommending one over the other is difficult. If you have something really detailed and specific to your team's process you're trying to automate, and you have coding knowledge and the time to invest in learning Jira's apis then scriptrunner is probably the solution. Otherwise go with Automation for Jira - it will save you a huge amount of time and headache"

• "No ScriptRunner doesn't really have a visual interface. There are some things they seem to have a UI for (like the create sub-tasks for example), but it's a pretty complex UI in general."