Best AI Memory for Claude Code
Claude Code is powerful, but it forgets everything between sessions. These 5 memory solutions fix that — from minimal notepads to full memory platforms.
Memory Solutions Compared
1. OMEGA
pip install omega-memory- +95.4% LongMemEval benchmark
- +Semantic search finds memories by meaning
- +Auto-capture via hooks — no manual saving
- +Multi-agent coordination across sessions
- +Works with every MCP client, not just Claude Code
- −More features than some users need
The most complete memory platform for Claude Code. If you want memory that actually works across long projects, this is the benchmark leader.
2. Claude-Mem
npx claude-mem- +Extremely simple — store, recall, forget
- +Zero config, just works
- +Easy to inspect (plain JSON)
- −No semantic search — must remember exact keywords
- −No auto-capture or hooks
- −Claude Code only — won't work with other clients
- −No encryption, coordination, or forgetting logic
A good scratchpad if you want the absolute minimum. Outgrown quickly on real projects.
3. Claude Native MEMORY.md
Built into Claude Code- +Zero setup — already there
- +Human-readable and editable
- +Version controlled with your repo
- −Not structured — just a flat text file
- −No search (Claude reads the entire file every time)
- −No cross-project memory
- −No automation, no types, no coordination
Fine for project-specific notes. Not a memory system — more like a sticky note.
4. mcp-memory-service
pip install + ChromaDB setup- +Semantic search via ChromaDB
- +Tags and metadata support
- +Dashboard UI available
- −Requires ChromaDB (external dependency)
- −No auto-capture hooks
- −No contradiction detection or forgetting
- −Smaller community, fewer updates
Decent if you already run ChromaDB. Otherwise, the dependency overhead isn't justified.
5. Mem0 OpenMemory
Docker Compose (Qdrant + OpenAI key)- +Backed by well-funded Mem0 team
- +Semantic search via Qdrant
- +Web dashboard for browsing memories
- −Requires Docker, Qdrant, and OpenAI API key
- −Heavy infrastructure for a memory server
- −Cloud-oriented architecture
- −No auto-capture hooks
Enterprise-grade infrastructure for a local memory task. Worth it if you're already in the Mem0 ecosystem.
Quick Comparison
Common Questions
Does Claude Code have built-in memory?
Claude Code has a MEMORY.md file that persists notes between sessions. However, it's a flat markdown file with no search, no structure, and no cross-project memory. For production workflows, an MCP memory server like OMEGA provides semantic search, auto-capture, and multi-agent coordination.
What is the best MCP memory server for Claude Code?
OMEGA is the top-rated MCP memory server for Claude Code, scoring 95.4% on the LongMemEval benchmark. It provides 25 MCP tools, semantic search, and zero external dependencies. Claude-Mem is a simpler alternative if you only need basic note storage.
Can I use multiple memory solutions with Claude Code?
Yes. Claude Code supports multiple MCP servers simultaneously. Some developers use MEMORY.md for quick project notes alongside OMEGA for structured, searchable, cross-project memory.
Do I need an API key for Claude Code memory?
OMEGA and Claude-Mem require no API keys. Mem0 OpenMemory requires an OpenAI API key for embeddings. mcp-memory-service requires ChromaDB. The best options for Claude Code are zero-dependency solutions that run entirely on your machine.
Give Claude Code a memory
Install OMEGA in 30 seconds. No API keys. No Docker. Just memory that works.