Medium Launches TK, a Writing App With AI and Private Libraries

TK combines note-taking and journaling with tools for sharing writing among selected collaborators. Users can ask its AI assistant for help from inside the editor by typing “@TK,” including requests for information, feedback on drafts or headlines, and help finding material in their saved notes. The app can also suggest prompts and organize writing.

Writers can share work through links or email, invite others to comment and react, or contribute to topic-based Libraries. These spaces can host projects such as recipe collections, poetry drafts and book collaborations, with access limited to their members. Medium says the app is intended to encourage writing and feedback without measuring pageviews or rewarding traffic.

The launch comes as Medium seeks ways to reach readers without depending on search referrals. CEO Tony Stubblebine said the company is shifting toward private blogging, as search engines and chatbots send less traffic to websites. Medium plans to bring some TK features to its main platform.

AI’s role in writing remains contested in publishing, where concerns include whether automated suggestions can replace a writer’s own work. Medium says users can disclose how AI contributed, including details about prompts and source material. The company acknowledges risks of low-quality content and blurred lines between human and AI writing.

TK is available to existing Medium members on the web, Android and iOS, and is free for people with a Medium account. Users can set access permissions, but writing is not encrypted. A native desktop app is planned; TK supports importing and exporting Markdown, though it is not itself a Markdown editor. Medium says the app could also create ways to earn money from private or paid content.