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
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!
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!
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".
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!! :)
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...