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Letter to the Heptabase Team on 2022-10-11

On Heptabase and its Developer Ecosystem

Dear Mr. Chan,

很高興見到你! I am Sunghyun Cho, a computer scientist based in LA and Seoul. I am also a contributor to GoogleChrome/, Facebook/docusaurus, Vercel/Satori, Logseq/Logseq, Etc. I came across Heptabase and wanted to speak with you!

First of all, I want to show my support and love ❤ towards anyone contributing the rethinking the Extracranials (-- my terminology of external thinking support software)!

As you can see on my website, I am heavily obsessed with Digital Brains on the web. My entire research page ( runs on heavily customized Obsidian, Nota, and Docusaurus, serving as my daily note-taking platform after figuring out Logseq Publish, Obsidian Publish, and Roam Garden did not suffice my needs.

I am recently experimenting with Visual Thinking tools ( was an interesting one), and you would know that there aren't any open-source/open-data/developer-friendly services in the market yet. As much as I hope Heptabase becomes an Open Core model (, it doesn't seem that's feasible shortly, considering there is still a paywall upfront. However, I would love to explore Heptabase's native APIs and endless possibilities 🚀

Now I would like to ask: Would there be some sort of... in the near future (within six months)?

  • Markdown-Wikilink import/export
  • API support (Notion-like?)
  • Handwriting/Pen Support (iOS App)?
  • Any open-source works
  • Free-to-use Service
  • Extension APIs

P.S. I love your work and blog and have always enjoyed reading your English/Taiwanese articles. I never knew Taiwanese → English translation evolved so well! Anyways, if you need any Korean 🇰🇷 translation support or anything I can help with, I'm more than happy to! I know a community of 900+ individuals interested in Heptabase & Visual Thinking.

感謝您, and I look forward to your response! 🇹🇼🇰🇷🇺🇸

敬祝 順利

誠鉉 敬上

(I just studied Taiwanese Business Letter 101 — Apologies if these are wrong 😅)