Second Brain - AI visual board and knowledge base
Second Brain allows you to AI chat with anything on a Visual Board — you can drop as much context and chat nodes as you want. Over time, you build a knowledge base — everything is interconnected, and you can AI chat with anything inside.
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Second Brain
Hey Product Hunt!
I’m Dom — a founder of Second Brain 🧠
Problem 😫 AI chats are powerful, yet everything they produce disappears into a single thread. There’s no way to organize, reuse, or build on top of that knowledge.
🤔 What if an AI chat could live inside a visual, interconnected knowledge system?
✨ Second Brain lets you:
Save AI responses to Pages — clean, editable, shareable docs (think: Notion meets ChatGPT).
Create an AI Visual Board — multiple chats and content nodes in front of you (think: they met Miro too).
Add anything — YouTubes, IG Reels, TikToks, PDFs, GitHub repos, websites, Looms, etc — and chat with them.
Organize everything with Projects and Smart Tags — then chat with a whole project or tag group.
Use the Chrome Extension to save anything from the web in 1 click.
Humanize AI-generated content to bypass detection tools.
Powered by top models: Grok 3 Fast, Claude Sonnet 4, DeepSeek R1, GPT-4.1 — always kept up to date.
🔐 Privacy matters
Data is never used for training, never sold, and never stored on AI providers.
🔮 Coming soon
Add even more stuff to the chat context: YT Shorts, Google Docs/Sheets/Slides, LinkedIn posts, etc.
Ask anything with Global AI Search: “Find all Pages or YouTube videos where ‘marketing’ is mentioned.”
Summarize & Listen: drop content, Second Brain summarizes it into an audio and plays it to you.
Feel free to check it out, watch the demo, and share any feedback, feature ideas, or questions 🙏
Thanks for reading 💛
Dom
Literally been drowning in scattered AI chats recently - Tryna find the one that works best for me tbh & the ability to save responses as proper pages + organize them visually is exactly what I've needed - Never thought I'd see the day I could chat w/ a Youtube vid lol!!
Can't wait to see how Dom and the team evolve this concept further!
Second Brain
@cranqnow thanks a lot Sam!! That's one of the core problems I had too—so much wisdom is inside those chats, yet everything gets lost.
And it just gets better the more you have inside!
@tech_wizzdom I know - Can't wait to try
Love how Second Brain brings structure to AI conversations, something that's been missing in most tools. Does it support syncing across devices or team collaboration for shared knowledge building?
Second Brain
@shahriardgm currently there's only a web app, but it's responsive and works very well on mobile. Especially if you add the page to the home screen—then it feels more like a native app.
There's no team collaboration at the moment, but I had a few requests for it, so I'm already brainstorming how to do it!
our AI-powered visual board and knowledge base for organizing ideas and insights. Capture thoughts, connect concepts, and boost productivity all in one place.
Second Brain
@jabari_zuri that's Second Brain!
I have to admit, that as a power user who has tried similar tools extensively over the past years, I've become vary on trying new stuff. It doesn't matter which second brain AI app I tried, I always run into the limitations quickly.
I guess the issue is the underlying AI models, that by themselves already promise things they can't fulfill.
I'm currently producing an online course out of my own book (380 pages) and other resources from other books.
Unfortunately the real context window of all the AI tools is about 60k Token. They become unresponsive after 100k - faaaar below the claimed 1M token (from OpenAI). My book alone needs 70k - so every other source I add breaks the system. So my question is: How much context can your tool handle IN REALITY?
If you'd ask me, I wouldn't consider myself a "power user" just for uploading 1-2 books, but that seems to be the reality.
Maybe most users are happy to chat with a few short PDFs and I'm one of the few who needs a (what they call) "massive" context window of several books. Oh boy...
Second Brain
@atmos_ awesome question!
And I agree, those 1M context windows work just in theory. You need to do some extra processing; that's what Second Brain does.
In the example of your book -> course use case, I would work like this:
You upload your book.
Then, you ask a question: "Make me a course about XYZ".
Second Brain first analyzes your book and grabs everything relevant about XYZ.
Then, it passes your prompt + relevant context about XYZ to the AI model, to get the answer.
In this way, only relevant parts from the book are passed, which increases the speed, quality, and cost. All the subsequent questions you ask will always get data from the book.
For a 380-page book, I would say it should work. Even before when it was not optimized that well, I was testing with a big book in German (400 pages), asking questions in English, and it worked well.
But I also don't wanna make false promises, because you know how it is with AI; the usage is so subjective, that the only real way of seeing if it works for you is actually trying it out.
@tech_wizzdom Sounds reasonable - thanks! But would it also work this way if I bring another book into the mix and say "Find the similarities and differences between the concepts of these books" and then make a lesson (or whatever) out of that? Practically I can't work with too tiny/focused sub-topics - it always needs to have my bigger picture. So the question is, if your second brain can process only the relevant parts of one bigger book - can it do so with a second book too and then connect the dots between these 2?
Knowledge Bases tend to grow quickly and become really big (at least in my case) - so this question is relevant for many other use-cases. I had to quit Kortex after just a few days, because after I uploaded just my Readwise/Kindle Highlights, the whole app became unusable.
Felo
Great control panel.
This way, I can see which pages are linked at the same time.
Second Brain
@charles_ Thanks!!
The coolest way for me is tagging pages. E.g. you tag all the relevant Pages with "#marketing" -> and then, you can chat with all the Pages tagged with "#marketing".
Even better, you can tag other things in the system too, not just Pages
Lamatic.ai
Love the Visual Board experience
Congrats team for the Launch
Second Brain
@vrijraj thank you!!
Second Brain sounds like a game-changer for anyone looking to organize AI knowledge in a more meaningful way. I'm really interested in how the AI Visual Board lets you work with interconnected nodes. Do you think this approach could be used for complex project management as well?
Second Brain
@evgenii_zaitsev1 thanks a lot!!
You can, try, but I personally wouldn't use it for complex project management, I believes it lack features for it.
It's awesome for research and organizing less complex projects, putting everything in one place, chatting with them.
But for more complex projects and collaboration there are more powerful tools (e.g. Asana)—they're a completely different product, and Second Brain is not going in that direction :)
I wish there were 15 days trial before committing to any paid plans. Pls consider.
Second Brain
@miriander ah, to be honest, it was the initial strategy! But from my experience, this one works better, for a few reasons:
People don't value free things. They will make an account and often not even try it for a moment.
On the other side, when people pay for something, they will try to get value from it. In that process, they'll recognize the power of the tool, and start using it properly.
Second Brain is fully bootstrapped, and AI tech is extremely expensive. I'd rather invest that money in something else (e.g. marketing), than pay for low-value users that are just a cost.
More serious users are coming—they'll investigate more about the product, and already come "prepared".
@miriander @tech_wizzdom I hear that you want your users come "prepared". The question is - as one of these very prepared users - how prepared are you for people like me ;) I have so much experience with tools like yours, that I don't find the essential info on your site. The details that really matter for power users - like context window, token cost etc. See my other comment below...
Second Brain
@miriander @atmos_ responded! 😉
I'm ready for power users. But I also listen: if something doesn't work well or if it's missing, it can be added to Second Brain (if it fits the overall idea of the product).
Really cool idea. I've always loved the node based systems and their visual representation.
This is definitely an interesting problem you're solving because the AI chats are scattered all over the place.
Second Brain
@ignat_petrov thanks a lot!! And it's so much better over time, when you actually fill it with data.
E.g. inside Second Brain, I have a project "Second Brain"; it's aware of everything I'm working on. And I can just chat with the entire project, and ask anything about it.
Second Brain is such a perfect name for this—it actually feels like an extension of your mind! 🧠✨ Love how it bridges the gap between AI chats and visual organization (Notion + Miro + ChatGPT = genius). The fact that you can chat with anything—PDFs, videos, even GitHub repos—is mind-blowing. 🤯 And that provacy promise? Cherry on top. This is the next level productivity! Killer work, Dom! 🚀
Second Brain
@rani_zagita thanks a lot Zagita!! 🚀
I love this comment, you perfectly explained everything 😄
Nonilion
Wow all the best @tech_wizzdom !!
Second Brain
@themisty thanks a lot Krishna!! :)
Congrats @Second Brain team on the launch. This is the most functional vision board i have ever seen. This is a great productivity tool to keep track of AI activity.
Second Brain
@manideepa_r thanks a lot!! 🚀
Codejet
Exactly the kind of tool I’ve been looking for — can’t wait to try it out! 🚀
Any plans for integrations with Make or Notion?
Second Brain
@patpijanowski thanks a lot Patryk!! 🎊
I was thinking about the Notion integration and importing everything to Second Brain. When you say "Notion integration", did you have something else on your mind?
Codejet
@tech_wizzdom This is exactly what I meant :D
AI Phone
The second brain idea resonates a lot, and I believe AI can take it to the next level. Love seeing fresh takes in this direction.
The real challenge, though, is lowering the friction of switching and sticking. Excited to see how this one fits into real workflows. Congrats on the launch!