Evan Henshaw-Plath, founder of Planetary, a decentralized social media platform built on scuttlebutt as an open protocol. It's ready for test flights and it's founder, also known as Rabble, (https://twitter.com/rabble) calls Planetary the "humane alternative to Facebook."
Burak Nehbit, founder & CEO of Aether (https://getaether.net) a peer-to-peer network of self-governing, interest-based communities who elect their own moderators. It's inspired by Usenet and Reddit, but unlike them, it also attempts to provide not only a platform, but also high-quality discussion on an ongoing basis.'
Edward West, founder & CEO of Hylo, an app that combines group management, messaging and collaboration built on holochain. Jarold Holtz, Director of Communications at Holo elaborates.