Substack has introduced a new feature that identifies how much of a newsletter is written by AI versus human authorship. This capability is made possible through an integration with Pangram, an AI writing detection tool, enabling users to scan posts, comments, and replies within Substack’s app for AI-generated content. While this transparency may challenge the platform initially by revealing AI usage in many newsletters, it aims to enhance trust in the long term by clarifying the content's origin and encouraging genuine human contribution.

This tool is part of a broader industry movement toward transparency in AI-assisted content creation. Platforms like YouTube, TikTok, and various music streaming services have begun labeling AI-generated audio, video, and music, sometimes with stricter measures like penalizing AI music tracks. Substack’s CEO Chris Best highlighted that while AI can support content creation, the essential creative insight and valuable ideas should come from writers themselves. The new Substack feature allows newsletters to optionally include an AI author’s note, disclosing AI involvement and fostering more honest communication with readers.

The detection feature will be accessible for any Substack content longer than 100 characters, including posts, notes, replies, and comments. Creators can scan their drafts with Pangram prior to publishing and can contest scans they believe are inaccurate. Substack emphasized this tool is not designed to restrict or penalize AI-assisted writing but to prompt writers to share how they create their work, reinforcing transparency rather than enforcement.

By adopting AI detection, Substack positions itself alongside other digital platforms advocating for clearer AI content labeling as these tools become more prevalent. This initiative reflects Substack’s commitment to maintaining a balance between embracing AI’s utility and preserving the platform's reputation for authentic, high-quality writing. Ultimately, it seeks to empower subscribers in understanding the content they consume while encouraging writers to engage openly about AI’s role in their creative processes.