Free
$0
Explore public ontology packs and query shared knowledge graphs.
- Public ontology pack access
- Basic graph search
- External AI tool lookup
Ontology Graph RAG Platform
Turn messy knowledge into reusable ontology packs.
OpenCrab helps teams convert documents, web research, and domain expertise into structured entities, evidence, relationships, and graph RAG workflows.
Public site, pricing, refund policy, terms, and privacy policy are available without login. The product workspace requires an account to protect customer data.
Live workflow
Document to Graph RAG
1
Ingest documents, URLs, notes, or structured research bundles.
2
Extract entities, concepts, evidence, relationships, and claims.
3
Store the ontology graph for retrieval, reasoning, and pack reuse.
4
Query the graph from OpenCrab, MCP clients, or connected AI workspaces.
Product
Built for knowledge products and AI workspaces.
OpenCrab is operated by AgentKorea. It supports ontology pack creation, graph search, AI-assisted synthesis, and connected MCP workflows for customers who need reusable knowledge structures.
Marketing and content planning
YouTube channel strategy and scripts
Brand, product, and audience analysis
Research note synthesis
Domain ontology pack creation
Graph RAG over private knowledge
Pricing
Simple plans for ontology creation and graph RAG.
Paid subscriptions are processed through Paddle. Customers can review pricing here before creating an account or starting checkout.
Pro
$10/mo
Create a private ontology workspace from your own documents and research data.
- Private document ingest
- Personal graph RAG workspace
- Isolated ontology storage
Expert
$30/mo
Build, manage, and commercialize expert ontology packs through OpenCrab review.
- Everything in Pro
- Ontology pack publishing workflow
- Reverse ingest from connected MCP tools
Company
OpenCrab is owned and operated by AgentKorea.
Support
Contact shineyw21@gmail.com for account, billing, and refund requests.