ChainMemory
Agentmemory
OpenMemory MCP
Pinecone
Memo.ai
Memori
cognee
MemoryLake
Collected Notes
Better Notes
Whimsical
Notion
Startup Notes
Evernote
Notepin
Facebook Notes
ChainMemory gives your AI agents persistent memory that belongs to YOU โ not to a single vendor.
Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored with Merkle proofs, so anyone can independently verify integrity โ no trust required.
Memories consolidate into a structured Project Brain (decisions, milestones, risks) instead of a pile of raw notes. Multi-agent native: Claude, Cursor and GPT share one consolidated state. Free tier available.
ChainMemory
Collected NotesAgentmemory - Persistent memory for Claude Code, Codex & coding agents
Better Notes - Simple notes app that ties notes together with #hashtags
OpenMemory MCP - Your private, local memory layer for all AI tools
Whimsical - The visual workspace for teams.
Pinecone - Search through billions of items for similar matches to any object, in milliseconds. Itโs the next generation of search, an API call away.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.