Bluesky suffered a sustained distributed denial-of-service attack beginning April 15 at 8:40 p.m. ET, with outages to feeds, notifications, threads, and search persisting through April 17, per Bluesky's status blog and TechCrunch. Bluesky described the attack as "sophisticated" and confirmed no unauthorized access to private user data. The platform experienced uneven degradation rather than a full blackout, with some users able to access personal feeds while others encountered blank screens and rate-limit errors; rival AT Protocol clients like Blacksky remained operational and reportedly saw a spike in migration requests.