Purple Hub
The Intelligent Memory Layer for AI Agents
Give your AI agents perfect memory. Purple Hub provides structured, intelligent memory management with semantic search, RAG knowledge base, and fine-grained access control. Built for LangGraph, LangChain, and sophisticated multi-agent systems.
Why Purple Hub?
Built for production AI systems that need reliable, scalable memory
📊 Structured Memory
Context → Episode → Interaction hierarchy keeps memories organized. No more flat "soup" memory that loses context. Each memory is properly scoped and retrievable.
🔍 Hybrid Semantic Search
Combine semantic similarity with dimension filters (topics, tags, entities). Binarized embeddings provide 32× storage reduction without sacrificing accuracy.
🔒 Enterprise-Grade Security
Fine-grained access control with private, group, tenant, and public scopes. Entity-level isolation ensures no cross-entity data leakage.
📚 Unified Memory + Knowledge
Separate RAG knowledge base for static documents (podcasts, articles, docs). Unified search combines conversational memory and knowledge in a single request.
🤖 Framework Integration
Official LangGraph Store implementation. REST API works with LangChain, LlamaIndex, CrewAI, and any system that needs agentic memory.
⚡ Performance Optimized
Prefix-based RocksDB iteration, in-memory semantic indexes, and batch operations. Sub-millisecond retrieval for cached knowledge chunks.
Perfect For
Use cases where AI agents need persistent, intelligent memory
Customer Support Agents
Remember customer preferences, past issues, and context across conversations. Provide personalized support that gets better over time.
Multi-Agent Workflows
Coordinate multiple agents with shared memory. Each agent can access relevant context while maintaining proper isolation and security.
Research Assistants
Combine conversational memory with RAG knowledge base. Agents can reference both past conversations and static documentation seamlessly.
Personal AI Assistants
Build assistants that remember user preferences, past interactions, and context. Private scope ensures user data stays isolated.
Enterprise AI Systems
Deploy at scale with tenant isolation, role-based access, and admin controls. Built for teams and organizations.
LangGraph Applications
Official Purple Hub Store for LangGraph's long-term memory. Drop-in replacement that works with existing LangGraph workflows.
Works With Your Stack
Integrates seamlessly with popular AI frameworks and tools
Get Started in Minutes
Simple setup, powerful results
1. Sign Up
Create your account at memory.purple-hub.com. No credit card required.
2. Create an Agent
Set up your first agent definition. Each agent gets its own API key and credit balance.
3. Start Building
Use the REST API or LangGraph Store to store and retrieve memories. Full documentation included.
Example: Store a Memory
curl -X POST https://memory.purple-hub.com/api/v1/add \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"messages": [
{"role": "user", "content": "User prefers dark mode UI"}
],
"user_id": "user_123",
"entity_id": "customer_456",
"scope": "private"
}'Built for Scale
Ready to Build?
Join developers building the next generation of AI agents with intelligent memory. Start free, scale as you grow.