ChainMemory
Mem0
Agentmemory
Memori
Tempreon
cognee
TheSecondBrain.dev
Suprflo
InsertKit
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
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Mem0 - Your private, local memory layer for all AI tools
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Memori - Persistent memory from agent trace, not just conversation
Tempreon - A personal memory layer for your AI tools, connected over MCP.
cognee - Memory for AI Agents
TheSecondBrain.dev - One Brain. Everywhere you work. One memory for Claude, ChatGPT, Cursor and every AI tool you use. Runs in your own Cloudflare account. Open source.