IMHO many "open source alternatives to" should drop that tagline.

This sentence is the first thing I read, and likely the last.

I don't know what "Trello" is. I don't see what your project or app could do for me. Even if I knew Trello, I wouldn't know why does it need an alternative. (Trello was (is?) great for personal use, by non-technical people.)

"A powerful, flexible kanban app that helps you organise work, track progress, and deliver results—all in one place." This is your selling point, not what your app isn't.