Heptabase

Heptabase is a visual note-taking and personal knowledge management (PKM) tool built for researchers, students, and knowledge workers. It structures information through modular markdown cards organized on infinite spatial whiteboards, section boards, and mind maps. It includes split-screen PDF highlighting, journal timelines, tag databases, and semantic search. Data is managed with a local-first approach (stored locally on disk) and synced to the cloud via AWS with encryption in transit (SSL/TLS) and at rest (AES-256). Note: Heptabase is not end-to-end encrypted, as server-side readability is utilized for cloud search and AI features.