i wouldn't recommend making it a trial. folks won't want to do the work to create their collab groups. let this spread virally and then figure out a freemium

i wouldn't recommend making it a trial. folks won't want to do the work to create their collab groups. let this spread virally and then figure out a freemium upsell later. for example perhaps you let groups add a virtual currency in a pro account, or your allow unlimited collab group creation but invitees get up to 3 groups they can join and then need to go pro.