False claim of Notion data for sale (November 2026)

Notion is aware of public claims alleging that a large dataset of Notion data was offered for sale, starting on November 11, 2026. We take any claim involving customer data seriously, and our security team conducted a thorough investigation with support from a third-party partner.

Based on our investigation, the materials reviewed do not match data in Notion systems, and we found no evidence that this claim entailed a breach of Notion customer data.

We understand that public-breach claims can create concern, especially when they appear on social media or underground forums. Here’s what we investigated, what we found, and what we did next.

What we investigated and found

When the claim first surfaced on November 11, 2026, our team reviewed the materials that had been shared publicly, including the sample data posted on the forum.

Our review of the publicly shared sample data found multiple inconsistencies. The sample did not match data in Notion systems, and it contained fields that were not consistent with a legitimate Notion dataset.

We will continue to investigate if new evidence or claims appear.