I just did a sidebyside of this with Trello, as I was ultimately looking for a task manager of sorts, and I've just deleted Trello...! Ahsuite offers what I needed, but so much more. It's going to help me with my start-up in ways I wasn't actually looking for. One is by enabling me to send links and info to prospective providers, allowing me to easily send login details, guides, Q&A's, etc, all at the same time I without have to mess about writing emails...! So far I'm hooked.