Hi,
here is Prakash from www.anandavalley.org socio-ecological project in Portugal. We were wondering if there is any possibility for you to selectively provide discounted or free plans for nonprofits, as with several other software.
At least in our case, a very small nonprofit like ours or any nonprofit, volunteers based, with an extremely low yearly budget, would be great to have the possibility to get at least some of the most useful Pro-features that don’t overload you with extra costs. I hope that this will also allow you to extend to more regularly paying users.
Can you consider it in one of your next releases? 
Thank you very much,
Best Regards.
Prakash