Medium’s TK app puts AI inside the writing process
Medium launched TK, a free app that puts AI inside the writing process, on November 9. Writers type “@TK” to summon an assistant that checks facts, suggests headlines, or pulls up notes—all without leaving their draft. The app also lets users share work in private groups for feedback, a move Medium hopes will reduce its dependence on search engine traffic.
Editor, Lazyfounder
30 SEC SUMMARY
- Medium released TK, a free AI-assisted writing app for its users, on November 9.
- TK integrates AI directly into the drafting process, offering real-time feedback, collaboration tools, and transparency features.
- The app aims to reduce reliance on search engine traffic by enabling private group sharing and early-stage collaboration.
- TK includes features like AI feedback, style guide comparisons, and integrations with Bear, Obsidian, and Claude.
- Medium positions TK as a pro-human tool, allowing writers to disclose AI usage for transparency.
TABLE OF CONTENTS
KEY HIGHLIGHTS
- Medium launched TK, a free AI-assisted writing app, on November 9.
- TK integrates AI into the drafting process via an '@TK' prompt for feedback, fact-checking, and style guidance.
- The app includes collaboration tools like Libraries for private group feedback and joint writing.
- Medium aims to reduce dependence on search traffic by enabling direct sharing in private groups.
- TK supports Markdown import/export and integrates with Bear, Obsidian, and Claude.
- Medium emphasizes transparency, allowing writers to document AI usage in their work.
TK brings AI into the writing process
Medium rolled out TK, its free AI-assisted writing app, on November 9. The app embeds an AI assistant directly into the editor, letting writers request feedback, fact-check details, or pull up saved notes without leaving their drafts. A desktop version is planned but not yet available.
How TK works: AI prompts, feedback, and collaboration
Type “@TK” followed by a question or command, and the AI assistant responds instantly. It can answer factual queries—like how many days are in a month—retrieve notes, suggest headlines, or compare drafts against a publication’s style guide. TK also imports and exports Markdown but isn’t a dedicated Markdown editor.
Writers can share drafts in small private groups using a feature called Libraries. Here, collaborators can leave comments, swap notes, or co-write in real time. The setup mirrors apps like Bear and Obsidian but adds built-in AI feedback and a social layer.
Why Medium built TK as search traffic declines
Google referrals now account for 44% of Medium’s traffic, down from higher levels before the search giant cut back. That decline tracks with broader industry trends: Pew Research Center found users clicked traditional search results only 8% of the time when AI summaries appeared, compared to 15% without them.
TK’s private group sharing is Medium’s answer to this shift. By letting writers collaborate early and share drafts directly, the company hopes to reduce its reliance on search-driven traffic. CEO Tony Stubblebine frames the move as part of Medium’s “pro-human” approach, where AI assistance is disclosed but never hidden.
The app also tackles transparency head-on. Authors can publish notes explaining how—and how much—AI contributed to their work, a response to concerns about the blurring line between human and machine-generated content.
TK vs. Substack: AI in drafting vs. post-production
Substack, Medium’s closest competitor, has taken a different path with AI. Its tools focus on post-production tasks like turning podcasts into transcripts, suggesting social media clips, or scanning text to estimate how much was written by AI versus humans. That scanner, powered by Pangram, has flagged distrust: 69% of writers in one survey said they distrusted AI-assisted work from others.
TK flips the script by embedding AI assistance into the drafting process itself. Both platforms now highlight collaboration and transparency, but TK’s approach puts the AI assistant front and center while the words are still being written.
What this means
Lazyfounder analysis — our interpretation, not reported fact.
TK demonstrates how publishers are shifting from search-driven distribution to direct, community-based collaboration—especially as AI summaries cut into traditional search traffic.
Key takeaways
- TK embeds AI assistance into the writing process, unlike platforms like Substack that focus on post-production tools.
- Medium’s move reflects a broader industry shift away from reliance on search engine traffic.
- The app’s collaboration features and AI transparency tools address writer concerns about AI ethics and feedback.
- TK is free for Medium account holders but lacks default encryption, making it less suited for sensitive work.
Related on Lazyfounder
Sources
- TechCrunch · 2026-11-09
Medium’s new TK app brings AI assistance directly into the writing process - Mashable · 2026-11-09
Medium's new app tries to save the platform from irrelevance
This story is an original summary drafted with AI by Lazyfounder from the reporting listed above and checked by automated validation. Facts are attributed to their original publishers; sections marked as analysis are Lazyfounder's. Where a source is in another language, facts were machine-translated and quotations are reported, not reproduced. Read the original coverage via the links, and see our AI policy and corrections policy.
About the author
Editor, Lazyfounder
Tarun Mottlia edits LazyFounders, covering Indian startups, funding rounds, AI and product launches. Every story on the site is AI-assisted and checked against its cited sources before publication.
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