convo is an open-source private event planner platform that keeps things simple and away from social media. You can easily create an event online without other distractions and invite your guests via e-mail. And the best thing is that your guests can register their RSVP without creating an account themselves. When guests register their RSVP, you will receive a notification for the same and check the available guest list in the event. All guests can respond to the event and communicate with others.