Are We Decentralized Yet?

Summary

Are We Decentralized Yet? ⚠️ JavaScript is disabled in your browser. Please enable it to use this site properly. How Concentrated Is The: Fediverse Mastodon, Pixelfed, etc. Servers Biggest(%) Rest(%) Atmosphere Bluesky, WhiteWind, etc. Servers Biggest(%) Rest(%) Data last updated: This page measures the concentration of the Fediverse and the Atmosphere according to the Herfindahl–Hirschman Index (HHI), an indicator from economics used to measure competition between firms in an industry. Mathematically, HHI is the sum of the squares of market shares of all servers. Values close to zero indicate perfectly competitive markets (eg. many servers, with users spread evenly), while values close to 10000 indicate highly concentrated monopolies (eg. most users on a single server). In economics, values below 100 are considered "Highly Competitive", below 1500 is "Unconcentrated", and above 2500 is considered "Highly Concentrated". This site currently measures the concentration of user data for active users: in the Fediverse, this data is on servers (also known as instances); in the Atmosphere, it is on the PDSes that host users' data repos. Other metrics and comparisons are possible, and I'm interested in exploring them. Code and data are available on GitHub. and pull requests, including other metrics for measuring distribution and resiliency, are welcome! By Rob Ricci: @ricci@discuss.systems / @ricci.io