• The policy of dividing key functionalities between sub-components that can be developed by a range of stakeholders enables Bluesky to provide its users with unprecedented flexibility and personalization.
• The architecture of the new platform, based on decentralised user identifiers and personal data servers, allows for improved management of user data.
Can you explain the concept of Bluesky and how it is different to other social media platforms?
Leonhard Balduf – Bluesky is a decentralized microblogging platform, which aims to provide an alternative to other centralized social media networks like X (formerly Twitter). Unlike other platforms like Mastodon, with Bluesky key functions of the platform are broken down into sub-components, which can be provided by other stakeholders. The idea is to facilitate greater flexibility and personalization for users, who can, for example, exert more control over the content they see by choosing to use different feed generators or customized moderation services.
Bluesky also has to deal with the complexity of decentralized content moderation
What are the main technical components of Bluesky, and how do they contribute to its decentralization?
Bluesky is built with several components that have been designed to be open and extendable to enable the community to develop new functionalities.
- Decentralized User Identifiers (DIDs) that enable users to create their own distinct digital identities that are not attached to any specific service provider.
- Personal Data Servers (PDS) that store user data. If they wish, users can migrate their data to different PDSes.
- Relay servers that aggregate data from PDSes to ensure high-performance delivery.
- Feed generators and labellers that facilitate the personalization and moderation of content.
How has Bluesky developed in terms of growth and adoption by users?
Bluesky has enjoyed significant growth since November 2022 when it initially launched as an invite-only service. After it went public in February 2024, the platform saw a substantial increase in the number of its users. By April 2024, Bluesky had approximately 500,000 daily active users, with peaks of up to 3 million ‘likes’ and 800,000 posts per day. In December 2024, the platform had 30 million users, with an average of 2.4 million active users per day. There was also an average of five million messages exchanged per day and 29 million ‘likes’. This growth was fuelled by specific events, such as the public launch of the service and user migration in response to changes on other platforms, notably during the US presidential campaign.
What challenges does Bluesky need to overcome to ensure its scalability and long-term viability?
One of the main challenges for Bluesky will be managing the scalability of its centralized components, notably the relays and AppView, which aggregate and distribute user data. Going forward, these components could become bottlenecks as the BlueSky user base grows. Bluesky also has to deal with the complexity of decentralized content moderation and ensure that it strikes a balance between freedom of expression and compliance with laws and regulations. Finally, given that the platform is currently free and ad-free, Bluesky’s business model remains uncertain, which raises questions about its long-term financial viability.
What is the outlook for the future development of Bluesky?
Bluesky can look forward to a promising future of continuing growth, fuelled by its ability to attract specific communities such as artists and special interest groups with tailormade functionalities. Opening up Bluesky infrastructure to third-party applications will also stimulate innovation and diversify the platform’s ecosystem. But let’s not forget that Bluesky will have to overcome the technical and economic challenges we mentioned earlier if it is to succeed in realizing its potential.
Leonhard Balduf
