Bluesky has joined the Internet Watch Foundation in an effort to tackle the rising amount of child sexual abuse material that has accompanied the platform’s growth.

Bluesky’s user numbers have risen dramatically from 13 million in November 2024, to 30 million in January 2025, in the wake of which there has been a “predictable uptick in harmful content,” an Internet Watch Foundation (IWF) press release reads.

The platform is also growing its “content moderation team and safety tooling,” the release continues. Bluesky has an open vacancy for a senior trust and safety lead.

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Members from across big tech platforms pay a fee to rely on IWF’s list of websites known for disseminating CSAM, and a hash list, which identifies known illegal CSAM material. Illegal content found by members feeds back into the IWF’s lists.

Meta, X, TikTok, and Telegram are all already members of the IWF.

Now Bluesky that has joined, it will be able to make use of IWF’s lists, including for non-photographic CSAM content.

Bluesky joining IWF is a “significant step forward” and the platform hopes to “keep its users safe from harmful content and ensuring a safer online environment,” Bluesky’s Head of Trust and Safety, Aaron Rodericks, said.