Osada is described as 'social networking platform specifically designed to be the glue that binds much of the decentralised web in a way that has not been possible before' and is an app in the Social & Communications category. There are more than 10 alternatives to Osada for a variety of platforms, including Online / Web-based, Android, Self-Hosted solutions, iPhone and Linux. The best alternative is Diaspora, which is both free and Open Source. Other great apps like Osada are Facebook (Free), Write.as (Freemium, Open Source), Friendica (Free, Open Source) and GNU social (Free, Open Source).
Facebook's mission is to give people the power to share and make the world more open and connected. Millions of people use Facebook everyday to keep up with friends, upload an unlimited number of photos, share links and videos, and learn more about the people they meet.
Friendica is a distributed social network application. Which allow users to connect with others via their own Friendica server, but may also fully integrate contacts from other platforms including Twitter, diaspora*, Pump.io and StatusNet into their 'newsfeed'.
Hubzilla is a powerful platform for creating interconnected based websites featuring a decentralised identity, communications, and permissions framework built using common webserver technology. Hubzilla is very suitable for communities (of any size).
Plume is not a single website, but an entire interconnected, yet independent network of what we call instances. You write content from your own instance, but anyone else on any other Plume instance can enjoy your stories too.