Heptabase

Heptabase is a visual, card-based knowledge base built for students, researchers, and lifelong learners who think on infinite whiteboards rather than nested folders. We rate it 84/100 — it is the best dedicated tool for synthesising messy research into a connected understanding, provided you are willing to pay a real subscription for it.

What is Heptabase?

Heptabase was founded in May 2021 by Alan Chan, Yeefun Lin, and Ethan Wu, went through Y Combinator, and has remained bootstrapped while reportedly crossing $200K in monthly recurring revenue on the strength of a fiercely loyal user base. The product is a Markdown-compatible card editor sitting on top of an infinite spatial whiteboard, with bi-directional links, journal entries, tags, PDF and YouTube highlighting, and offline-first sync across desktop and mobile.

Where most note apps optimise for capture, Heptabase optimises for the second step — taking the cards you already wrote, dragging them onto a whiteboard, grouping them, drawing arrows between them, and watching the structure of an idea actually appear. That spatial layer is the entire pitch, and it is the reason people switch to it from Obsidian, Notion, or Roam.

Key Features of Heptabase

• Whiteboards and sub-whiteboards: Drop cards on a 2D canvas, group them, nest whiteboards inside whiteboards, and zoom out to see the entire structure of a topic at once.
• Card editor with bi-directional links: Markdown-friendly blocks, backlinks, and tags. The same card can live on dozens of whiteboards without duplication.
• PDF and YouTube highlighting: Highlight passages directly inside Heptabase — including OCR on scanned PDFs on Premium plans — and pull the highlight into a card with one click.
• AI Tutor: Launched in public beta in April 2025 and rolled out across all paid tiers; turns any topic into a personalised mini-course that lives inside your knowledge base instead of a separate chat window.
• Offline-first sync: Local-first storage with real-time sync across Mac, Windows, Linux, iOS, Android, and web. You can write on a plane and the merge just works when you reconnect.
• Heptabase MCP: Late-2025 update added a Model Context Protocol server so Claude, ChatGPT desktop, and other LLM clients can query and update your Heptabase library directly.

What Users Say About Heptabase

Sentiment on Reddit's r/Heptabase and r/ObsidianMD is unusually positive for a paid PKM app. The most-upvoted comparison threads describe Heptabase as "a more stable, predictable experience" than Obsidian plugin stacks, and praise the developers for shipping hundreds of small improvements based on community feedback. Product Hunt reviewers single out the whiteboard model as "the missing layer above notes" that they did not realise they needed.

The complaints are real and recurring. Multiple users report lag on whiteboards with thousands of cards, especially when those cards contain large PDFs, and the to-do handling is widely regarded as the weakest part of the app. A common gripe in 2026 is that the in-app upgrade prompts and resubscription dialogs feel intrusive when you are simply revisiting old notes. None of this is a deal-breaker — it is the texture of using a young, opinionated product.

Heptabase Pricing

Heptabase has a 7-day free trial and three paid tiers. All tiers can be billed monthly or annually, with a 25% discount on annual billing.

Plan	Price (monthly)	Key Limits
Pro	$8.99/month	Unlimited notes, whiteboards, tags, image uploads, collaborator invites; PDF highlights and YouTube transcripts; AI features trial with 100 AI credits/month
Premium	$17.99/month	Everything in Pro plus unlimited PDF uploads and OCR, unlimited basic AI chats, AI Tutor, 1,800 AI credits/month
Premium+	$53.99/month	Everything in Premium plus 8,100 AI credits/month and a 33% discount on additional AI credits

Who Should Use Heptabase?

Best for: graduate students writing literature reviews, researchers synthesising findings across dozens of papers, non-fiction writers building up an argument from sources, and visual learners who think in maps rather than outlines.

Not ideal for: people who just want a fast capture inbox or a daily journal — a plain Markdown app or Apple Notes is faster. Teams that need granular permissions, comment threads, and admin controls should look at Notion or Coda instead. Anyone who needs a serious task manager will find the to-do system underbuilt.

Pros and Cons

Pros:

• The whiteboard-of-cards model genuinely changes how you organise complex topics; nothing else does it as well.
• Local-first, offline-first sync across six platforms with a clean conflict-resolution story.
• Active development cadence with weekly newsletters and an open public roadmap.
• Bootstrapped, profitable company that is unlikely to be acquired and shut down — a real concern with VC-backed PKM tools.
• AI Tutor and Heptabase MCP are not gimmicks; they integrate cleanly with the card model.

Cons:

• Performance degrades on whiteboards with thousands of heavy cards or many large PDFs.
• To-do handling, recurring tasks, and reminders are minimal compared to a dedicated task app.
• Premium and Premium+ pricing is steep for casual users; the AI credit model adds variable cost on top of the subscription.
• No native team workspace with admin controls — collaboration is invite-based, not org-based.

Alternatives to Heptabase

For a free, local-first option with a giant plugin ecosystem, see Obsidian. For an outline-and-database hybrid, Notion remains the default. For block-based, open-source alternatives, look at AFFiNE, Anytype, and Logseq. None of them replicate the spatial whiteboard layer that defines Heptabase.

Verdict: Is Heptabase Worth It?

If you do serious thinking on paper or whiteboards and have ever wished your notes lived on a canvas instead of a sidebar, Heptabase is worth the $8.99/month Pro tier on its own. The Premium and Premium+ tiers are harder to justify unless you actively use AI Tutor or process large volumes of PDFs. We rate it 84/100 because the core idea is executed better than any competitor we have tested, and the developers ship constantly — but performance on very large knowledge bases and a thin task layer keep it out of the 90s. As of April 30, 2026, this remains the visual PKM tool to beat.

Frequently Asked Questions

Is Heptabase free?

No. Heptabase offers a 7-day free trial, after which a paid plan is required. Pricing starts at $8.99/month for the Pro tier when billed monthly, with a 25% discount on annual billing.

What platforms does Heptabase support?

Heptabase has native apps for macOS (Apple Silicon and Intel), Windows, Linux, iOS, and Android, plus a web app. Sync is real-time and works offline-first.

How does Heptabase compare to Obsidian?

Obsidian is a free, local-first Markdown editor with a huge plugin ecosystem; Heptabase is a paid product with first-party whiteboards, AI Tutor, PDF highlighting, and managed sync built in. Obsidian is more flexible and free; Heptabase is more opinionated and ships features Obsidian users typically piece together with plugins.

Is Heptabase open source?

No. Heptabase is closed-source proprietary software, though the company maintains a public wiki, public roadmap, and a Heptabase MCP integration that lets external tools read and write your library.

Does Heptabase work offline?

Yes. Heptabase is local-first; you can read, write, and edit cards and whiteboards without a connection, and changes sync automatically when you reconnect.