[bruce511]

You call them "customers" not "users", implying you'd like to earn money from this? In which case no, I don't think you should Open Source it. Getting paid for Open Source, especially by companies, is unlikely.

You have a product targeting orgs big enough to use Jira. That's a tough market to be in. Hope you've done your market research and have a sales strategy figured out.

If you don't, then consider this a good learning exercise. Do the hard parts first (marketing, sales etc.) The code is the easy part, do that last.