Drop anything in.
It organizes itself.
Paste a link, drop a PDF or video, forward a newsletter. BlackHole writes a clean, connected note into your knowledge base, files it where it belongs, and keeps the whole thing organized — so you can actually find and use what you save. Then ask it anything.
One-time license. Bring your own AI key, or let us host it. Your notes stay as plain Markdown on your machine.
Attention Is All You Need
Introduces the Transformer — an architecture built entirely on self-attention, dropping recurrence for parallelism and long-range context.
- Local-first — your data stays yours
- Plain Markdown, fully portable
- The Karpathy method, automated
- Works with Obsidian (optional)
You're great at saving things.
Terrible at coming back to them.
Five browser windows, a hundred open tabs, a Drive full of PDFs, a read-later app you stopped opening. The information's all there — it's just not organized, connected, or findable. And tools that promise to fix it (looking at you, blank Obsidian vault) ask you to become a part-time librarian first. Most people quit before the payoff.
BlackHole does the librarian part for you.
Three steps. Then it runs itself.
Drop it in.
A URL, PDF, image, audio, video, or a tweet thread. Drag it, paste it, or capture the current tab in one click.
It does the work.
BlackHole reads or transcribes the content, writes a clean note with a title, summary, tags, and source — then links it to related notes and files it in the right place.
It keeps itself organized.
In the background it maintains the graph: new connections, maps of content, de-duplication, tidy tags. Your knowledge base gets better as it grows, not messier.
Then ask it anything — “what have I saved about X?”, “connect these ideas,” “draft an outline from everything on Y.”
See everything it doesThe method top AI researchers swear by — automated.
In April 2026, Andrej Karpathy popularized building a personal “LLM knowledge base”: let an AI compile your sources into a living, linked Markdown wiki you can load straight into context. It works beautifully — if you're willing to wire it up by hand. BlackHole is that exact idea, end to end, with none of the setup.
Karpathy's LLM wiki — without being Karpathy.
Everything it does
Drop anything
Links, PDFs, images, audio, video, YouTube, full tweet threads (auto-unrolled). It extracts and transcribes so you don't have to.
Auto-structured notes
Title, summary, tags (reusing your existing ones), source, date — clean Markdown, every time.
Auto wiki-linking
It connects each new note to the related notes you already have. Your graph wires itself.
Auto-filing (PARA)
Notes land in the right folder — Projects, Areas, Resources, Archive — not a junk drawer.
Chat with your vault
Ask questions, get answers grounded in your notes, with citations you can click.
It maintains itself
A background librarian keeps links, maps of content, and tags tidy as the vault grows.
You own everything
Plain Markdown on your disk. Use Obsidian, or don't. Export anytime. No lock-in.
Your AI, your call
Bring your own key, or let us host it. Local-only, cloud, or a balanced hybrid — your choice with one slider.
Capture from anywhere
Browser extension, bookmarklet, email-to-vault, and an MCP server — save straight from Claude, ChatGPT, or your IDE.
Most tools help you save.
BlackHole keeps it organized.
Saving was never the hard part — upkeep is. BlackHole runs a quiet background librarian that builds maps of content, writes the links you'd never get around to, flags duplicates and stale notes, and keeps tags consistent. Heavy lifting can run locally overnight; you wake up to a tidier brain. The bigger your vault gets, the more valuable this becomes.
- +Linked 12 new notes across 4 topics
- +Built map of content: “Machine Learning”
- ~Merged 3 duplicate captures
- +Normalized 28 tags
- !Flagged 2 stale notes for review
Your brain. On your machine. In plain text.
BlackHole writes standard Markdown files into a folder you control. Nothing's trapped in a proprietary cloud. Run the AI fully locally for maximum privacy, in the cloud for speed, or split the difference. Either way, your knowledge is portable, inspectable, and yours.
- Standard Markdown in a folder you control
- Run the AI local, cloud, or hybrid
- Portable, inspectable, and yours
Simple pricing. Own it outright.
Free
For Trying it out
- Bring your own AI key
- 50 ingests + 50 chats / month
- Local embeddings included (free)
- Core features
Pro
For Most people
- Bring your own AI key
- Unlimited ingests & chats
- Local embeddings included (free)
- Everything, all v1.x updates
- Pay once, own it outright
Managed
For “Just handle the AI for me”
- We host the AI — no keys
- 750 ingests + 400 chats / month
- then $10 top-up packs
- Local embeddings included (free)
- Everything, always latest
Be first through the event horizon.
BlackHole isn't public yet. Drop your email and we'll let you know the moment it's ready to download — no spam, just the launch.
*Managed (hosted inference) comes after launch — join the waitlist and we'll tell you when it's live. Pro is a one-time purchase: pay once, own it, bring your own AI key. Billing runs through Polar, which handles tax and license keys.
Questions, answered.
Do I need Obsidian?
No. BlackHole works on its own with a plain Markdown folder. If you love Obsidian, one click sets it up over the same folder.
Do I need an API key?
For Pro and Free, you bring your own (OpenRouter — takes a minute, costs a few dollars a month for most people). Local embeddings are free. Managed includes everything; no keys.
Is my data private?
Your notes are plain Markdown on your machine. You can run the AI entirely locally if you want nothing to leave your device.
Does it lock me in?
No. It's just Markdown files. Export, switch tools, or open them in any editor anytime.
What can I drop in?
Links and web pages, PDFs, images, audio, video, YouTube, and tweet threads (auto-unrolled). More import sources (Pocket, Readwise, bookmarks) are on the way.
Is this RAG?
It's smarter than basic RAG: for a focused topic it loads the full relevant notes into the AI's context for higher fidelity, and falls back to search only when your vault is huge. You get better answers without thinking about it.
Mac, Windows, or Linux?
macOS first. Windows and Linux are on the roadmap.
Start saving things you'll actually use again.
One-time license · Your data stays yours · Cancel-proof (it's just Markdown)
