AI knowledge graph · personal knowledge management
Memohopper turns pages, PDFs, emails, tasks, and quick notes into connected knowledge pages on a visual graph — for researchers, builders, and anyone whose ideas outgrow a folder of notes. AI keeps it sourced and searchable. You do the exploring.
Free plan included · No credit card · Your agents connect free
Memohopper is an AI knowledge tool that turns everything you read, clip, and ask into connected knowledge pages on a visual graph. You explore it by hopping node to node; AI keeps it sourced, searchable, and growing — and your AI agents can use the same knowledge over MCP, on every plan.
Explore
Exploring is your move. Type any concept and Memohopper generates a full, sourced Context — a readable knowledge page — then links it into your graph next to what you already know.
Hopping
Click a node, read, follow a typed edge — depends_on, uses, derived_from — to the next idea. Colors tell you what kind of thing you're looking at; edge labels tell you why it's connected.
Chat
One chat, scoped by a chip — this Context ⇄ whole workspace. Answers stream in with citation chips that point at real nodes, memos, and web sources. Nothing enters the graph unless you harvest it.
AI edits
Ask for a change and you get an editable proposal card — never a silent rewrite. Review the diff, then choose [Rewrite in place] or [Add as a block]. The page gets better; the answer doesn't scroll away.
Reason mode
Some answers hide behind another fact. Reason mode reads what it finds, names the missing bridge, searches again — and shows you the hop trail. In our internal multi-hop retrieval eval it nearly doubled accuracy vs single-shot retrieval (53 → 93).
searched "why do users churn?" · read 4 pages found: review-mining
missing bridge: "Mem's gap" — searched again found: competitor landscape
Capture · 10+ integrations
The New-entry launcher has three tabs — Prompt (ask, and the AI builds a Context), Document (upload & extract), Write (author one yourself). On paid plans, connectors bring in the rest from where it already lives.
Memos & Library · verbatim capture
Some things should stay exactly as you wrote them. Memos are verbatim amber sticky-notes that live on the graph itself; the Library keeps every capture accounted for, with its origin on the label.
For agents
Memohopper ships an MCP server and a REST API with scoped tokens. Your agents read and write the very same graph you explore — and full agent access is free, on every plan. What an agent stores this week, you can hop through next week.
// your agent's toolbox, over MCP
remember("Beta users stall at the pricing step")
→ stored · linked to Pricing ladder
deep_recall("what did we decide about free agents?")
→ 3 contexts · "the plan governs capability,
not the channel" · from agents-free wedge
evolve_context("billing-via-paddle", "add the
verification-timeline caveat")
→ proposal created — you review the diff
Plain words
A Context is a living page for one idea — readable, editable, with its sources attached. When AI improves it, the page itself gets better, in place. Compare that to a chat answer, which scrolls away the moment you ask the next question.
Knowledge is mostly connections — this idea depends on that one, this decision came from that evidence. A graph makes those connections visible and walkable, so instead of remembering where you filed something, you follow the lines between ideas.
A way of answering questions that need two steps. It searches, reads what it finds, realizes what's still missing, and searches again for that — then shows you each step it took, so you can check the trail, not just trust the answer.
How it works
Clip a page, forward an email, upload a PDF, connect a source — or just write. Every entry point becomes a Context on your graph.
Open the graph, click a node, read the page, follow a typed edge to the next idea. Breadcrumbs keep your trail.
Ask for what's missing and AI builds the page. Ask for changes and it proposes an edit in place — you approve the diff.
Search, chat, or Reason mode — answers grounded in your own content, with citations. Your agents can do the same.
Use cases
Capture papers, PDFs, and web sources; each becomes a sourced Context linked to related work. Reason mode answers multi-hop questions across your literature — with citations back to the sources.
Clip competitor pages, forward customer emails, connect Jira, Todoist, or Confluence. Decisions stay linked to the evidence they came from — walkable when someone asks “why?” months later.
Give your agents a persistent, shared memory over MCP — free on every plan. What one agent stores, another can recall, and you can read it all on the same graph.
Compare
An honest comparison of where each one puts your knowledge — and what happens to it afterwards.
| Memohopper | A notes app | An AI chatbot | |
|---|---|---|---|
| Where knowledge lives | Connected, editable pages on a visual graph | Documents in folders | Chat scrollback |
| Connections between ideas | Typed, labeled edges you can see and walk | Manual links, if you make them | None are kept |
| AI answers grounded in your content | Yes — with citation chips to your own pages | Sometimes, as a paid add-on | Grounded in the web, not your notes |
| AI agents can read / write it | Yes — MCP + REST, free on every plan | Rarely, and usually read-only | No shared, persistent store |
| What happens to a good answer | Becomes a page, linked into the graph | You paste it somewhere yourself | It scrolls away |
Privacy & security
Your content is never used to train AI models, never sold, and never shown ads. AI features send only the relevant content to model providers to generate your response — nothing more. Full details in the privacy policy.
Pricing
Every plan includes the full toolkit — every AI feature, even Reason mode, and free agent access. Plans differ mostly in capacity; paid plans add premium models, integrations, and background intelligence.
$0forever
The whole product, with a generous AI allowance.
$8/ month
Premium models, integrations, and a graph that works while you sleep.
$20/ month
Everything in Pro, with the biggest allowance and the most room to grow.
No daily lockouts. Your AI allowance refills continuously — no midnight reset.
Prices in USD. Taxes handled at checkout. Payments processed by Paddle · Refund policy
FAQ
Memohopper is an AI knowledge tool that turns everything you read, clip, and ask into connected, editable knowledge pages — called Contexts — on a visual graph. You explore the graph by hopping from node to node, AI keeps every page sourced and searchable, and your AI agents can read and write the same knowledge over MCP.
Yes — the Free plan is $0 forever and includes the whole product with a generous AI allowance. Every AI feature is included, even Reason mode; agents connect free with read and write access; and you get 2 workspaces, 500 Contexts, capture by prompt, document, or write, plus hybrid search and the Library. No credit card required.
A Context is a structured, readable, editable knowledge page that Memohopper creates from anything you capture — a web page, PDF, email, task, or quick note. It lives as a node on your graph, linked to related ideas, and AI can improve it in place instead of replying in a thread that scrolls away.
Reason mode is Memohopper's multi-hop retrieval for questions a single search can't reach: it searches, reads what it finds, names the missing bridge, searches again — and shows the hop trail behind its answer. In our internal multi-hop retrieval eval it nearly doubled accuracy compared with single-shot retrieval (53 → 93).
Yes — Memohopper ships an MCP server and a REST API with scoped tokens, and agent access is free on every plan, for reading and writing. Your agents use tools like remember, recall, deep_recall, and explore to work with the very same graph you see in the app.
Notes apps store documents in folders and leave the linking to you; Memohopper turns what you capture into connected knowledge pages on a graph, with typed, visible connections you can walk. Chat answers cite your own content, AI improves pages in place, and your AI agents can read and write the same knowledge — free on every plan.
A chatbot's answers scroll away; Memohopper turns good answers into permanent, editable pages linked into your graph. Its chat is grounded in your own content with citations to real nodes and memos, and everything it produces stays organized, searchable, and reusable — by you and by your agents.
Your content is never used to train AI models, is never sold, and there is no advertising. Your data is hosted in the EU; AI features send only the relevant content to model providers to generate your response; and this site sets no tracking cookies. See the privacy policy for full details.
You can cancel any time from the app's billing settings or via the link in any Paddle receipt, and you keep paid features until the end of the period you've paid for. Your first purchase has a 14-day money-back guarantee — email support@memohopper.com. Full details are in the refund policy.
In the European Union: the database and storage run on Supabase (eu-west-1) and the application is hosted on Fly.io in Amsterdam. Where a subprocessor is outside the EU, transfers rely on Standard Contractual Clauses or an adequacy decision — the full list is in the privacy policy.
Free plan included · No credit card · Your agents connect free