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ChainMemory
Mem0
Agentmemory
Memori
Tempreon
cognee
TheSecondBrain.dev
Suprflo
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.
Apple Notes
ChainMemoryApple Notes is recommended for Apple users who prioritize seamless device integration, simplicity, and security. It's particularly suited for individuals who frequently switch between Apple devices and need their notes to synchronize effortlessly. Additionally, itโs ideal for users who appreciate basic note-taking features without the need for extensive customization or third-party app integration.
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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.
Mem0 - Your private, local memory layer for all AI tools
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Workflowy - A better way to organize your mind.
Memori - Persistent memory from agent trace, not just conversation