Most importantly, with ChatGrape we're going beyond of simply providing a chat based communication solution. On ChatGpape, we're offering a smart engine that automatically triggers workflows based on your communication, such as, let's meet at 2pm tomorrow - automatically adds a calendar event.
There's more than that, of course, but the essence is that we're running a quite extensive engine in the background to make your team's communication easier and more efficient, and that takes up actual processing power.
Finally, considering that our aim to to save you time that you can use better on building your own baby, instead of wasting time searching for documents you ant to share and issues you want to reference - the average startup using ChatGrape has access to all the features for around 35 bugs per month, which is really a reasonable price, don't you think?