smpl offers Free Trial, but MembershipWorks does not.
smpl is designed for Individuals, Freelancers, Medium Business and Small Business.
MembershipWorks is designed for Large Enterprises, Medium Business and Small Business.
Pricing for smpl Starts at $2/User whereas for MembershipWorks Starts at $99/Month.
Some top alternatives to smpl includes MembershipWorks, Qualified, andcards, CoWello, OfficeSpace Software, Workvivo, SpacetoCo, MyFocusSpace, Smartwebs, Satellite Deskworks, Coworks and SuperCoworker.
Some top alternatives to MembershipWorks includes iMIS, ClubExpress, MemberLeap, Nimble AMS, MemberClicks, YourMembership, Aptify, Join It, ChMeetings and Springly.