Meetup, Attendize Event Ticketing, Get Together, Openki, DownToMeet, Mobilizon, Agorakit, Open Event, Facebook Local, MyyUtopia, EventsApp, GroupMeet, Letsmeet.click, IveTime, Meeting Star, Kommunity, Meetupedia, Bylde, uGetTogether, DownToDash, Eventil, WeBeam, SkillMint, Lanyrd are some alternatives to Introwise.