Opennote was a digital notebook designed to help people make sense of scattered information. Its central idea was a notebook that “thinks with you,” supporting users as they organized notes, knowledge, and learning. The product aimed to help people work through information that might otherwise remain spread across different sources, bringing it together in a more useful way.

On May 6, 2026, Opennote announced that it had been acquired by Reducto. The team said that what it learned while building the notebook would contribute to Reducto’s work on document intelligence, with a broader focus on helping people and AI agents understand and act on complex information. Following the acquisition, Opennote was sunset, and its app is no longer available. Former users who need a copy of their data or have questions can contact the team at [email protected]. Opennote’s announcement thanked its users for trusting the service with their notes, knowledge, and learning, and reflected on the experience of building the product.