[logicuce]

Seems like unpopular opinion given comments on this thread, but here it is anyway.

Using my employer's email addresses for services I want to control doesn't sound right. Of course, LinkedIn is a different story but for SaaS platforms like Trello, my employer should be the rightful owner of the data I store in there if I used it for work.

Imagine the other scenario, if that Trello account's control didn't move to the employer, the employee would still be keeping the content he created FOR the employer long after his employment has ended. I don't think that is cool.

Your data is your data, likewise, your employer's data is theirs. If you don't want any hassle, keep these two lives different.

[shashanktomar]

I believe that is not entirely true. Here is the explaination https://news.ycombinator.com/item?id=22874704

[logicuce]

You created a Side Project but used your company's email ID to share it with your teammate at work.

Does that side project belong to you or to your company? If it belonged to you, why would you use office email ID for collaborating on it? and if it belonged to the company, why would you manage it on a personal Trello account?

Sorry to sound harsh, but unless I am missing something, to begin with, looks bad judgement on your part.