Heptabase

Heptabase is a visual note-taking and research tool built on infinite whiteboards, atomic cards, and backlinks for mapping and understanding complex topics. It offers fast search across large note sets, journals, tags, mobile sync, offline support, and 2025-era AI features like chat with your notes and automatic tagging. It integrates with Readwise, Google Calendar, PDFs, Markdown, and Obsidian export. Best for students, researchers, and knowledge workers.

Heptabase is a visual note-taking and research tool built around infinite spatial whiteboards where you arrange atomic "cards" of notes, connect them with backlinks, and visually map how ideas relate. It is designed for people who need to deeply understand complex topics, students, researchers, and knowledge workers, rather than for quick capture alone. Beyond whiteboards, Heptabase offers fast full-text search across large note collections (reportedly 10,000-plus notes searchable in under a second), journals, tags, mobile sync, and offline support. In 2024 it added Tags and improved Journals, and in 2025 it introduced AI features including AI chat with your notes and automatic card tagging, plus monthly AI credits on paid plans. Heptabase integrates with Readwise, Google Calendar, and handles PDFs and Markdown, and it can export to Obsidian. It is a paid product with a free trial rather than a free tier, reflecting its focus on committed users who want a durable, visual thinking environment for research and learning.