Mastodon - Open Source Decentralized Social Networking

Mastodon

A free, open-source, decentralized social media platform. It puts control back in users' hands, allowing anyone to run a server (instance), and users across instances can follow each other seamlessly.

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Programming Language (License AGPL-3.0)

Ruby

JavaScript

TypeScript

Open Source Alternative To

Twitter / X

Facebook

Key Features

Decentralized Network

Independently operated servers (instances) that interconnect to form a global, federated network.

Self-Hostable & User-Owned

Users can host their own instances for full data control, free from corporate algorithms or ads.

Chronological Feeds

No algorithmic content manipulation; posts are displayed in real-time chronological order.

Privacy-Focused

No ads, no tracking, no data selling. Emphasis on user privacy and data ownership.

Interoperable (ActivityPub)

Built on open web protocols like ActivityPub, allowing interaction with other compatible platforms.