I am totally in agreement with Manoj of Qwary. This is a tool dedicated to Agile project management and it is so much more cleaner than Jira (the most popular). Yes, they are late to the market and there are a few things required here and there, but having unlimited users for even Tier 1. You are nuts to miss on this - even if they have free plan for 10 Users. Value for money with a company that is well established and doing well.

If you think this is a way for them to bait you and get you in the door to upsell - yes you are right, but you are not just getting your foot, but a access to a significant module in their portfolio.