Neither Git Butler nor Mergify offers a free trial.
Git Butler is designed for Individuals, Freelancers, Medium Business and Small Business.
Mergify is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Git Butler Starts at $20/Month whereas for Mergify Starts at $9/Month when Billed Yearly.
Some top alternatives to Git Butler includes automation.re, Qualified, Workvivo, Mergify, GitlabRunner, IFTTT, WorkflowCI, Supermetrics, Online Check Writer, Drag and Ecanvasser.
Some top alternatives to Mergify includes Assembla, DevScore, Graphite, Qualified, What The Diff, Our Shared Inbox, Workvivo, XetHub, MergeQueue, Polish, CodeSee and IFTTT.