The best open source alternative to Bluesky is Mastodon. If that doesn't suit you, we've compiled a ranked list of other open source Bluesky alternatives to help you find a suitable replacement. Other interesting open source alternative to Bluesky is Hey.
Bluesky alternatives are mainly Decentralized Social Networks but may also be Web3 Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Bluesky.
A free, open-source social media platform that puts users in charge of their data and connections

Mastodon is a radically different approach to social media that puts control back in the hands of users.
As a decentralized, open-source platform, Mastodon offers several key benefits:
User-controlled experience: You decide what appears in your feed, without algorithms or ads dictating content. Follow accounts across any Mastodon server from a single profile and see posts in chronological order.
Build your audience with confidence: Manage your audience directly, without intermediaries. Self-hosting Mastodon gives you full control over your online presence while still connecting to the wider Mastodon network.
Effective moderation: Each server creates and enforces its own rules locally, allowing for more responsive and tailored moderation compared to centralized social media. Join a server aligned with your values or host your own.
Express yourself freely: Mastodon supports rich media posts including audio, video, images, polls, and more. Custom emojis, content warnings, and other features allow for nuanced self-expression.
Open and interoperable: Built on open web protocols, Mastodon can connect with other platforms in the "fediverse", expanding your social network beyond just one service.
By choosing Mastodon, you're opting for a social media experience that respects your agency, protects your data, and fosters genuine community engagement. Join the growing network of users taking control of their online social presence with Mastodon.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A blockchain-powered social platform offering censorship-resistant content sharing, user-owned data, and innovative monetization options.

Hey is a groundbreaking decentralized social networking platform built for the Web3 era. It combines the best aspects of traditional social media with the power of blockchain technology to create a more open, transparent, and user-centric experience.
Key benefits of Hey include:
Hey reimagines social networking for a decentralized future, empowering users with greater control, privacy, and earning potential. Join the revolution in digital social interaction and experience the freedom of Web3 social networking.