ChainMemory
Tempreon
Memori
Agentmemory
OpenMemory MCP
TheSecondBrain.dev
Pinecone
Memo.ai
Noteato
Notion
Obsidian.md
Evernote
Joplin
Logseq
Milanote
OneNote
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
NoteatoNo features have been listed yet.
Tempreon - A personal memory layer for your AI tools, connected over MCP.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Memori - Persistent memory from agent trace, not just conversation
Obsidian.md - A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.