
ChainMemory
Mem0
Agentmemory
Memori
Tempreon
cognee
TheSecondBrain.dev
Suprflo
SeqLog
Logseq
Obsidian.md
Roam Research
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.
SeqLog is a native macOS outliner for people who want their notes to stay ordinary files.
Every note is a plain Markdown file in a folder you choose. There is no database and no proprietary format, so ripgrep, git, or any other tool on the machine reads exactly the same bytes. Full text search runs over the folder itself, so there is no index to rebuild or corrupt.
A daily journal and named pages sit side by side. Wikilinks connect them and every page lists the blocks that link to it. A command palette searches page names and file contents together.
Git is embedded rather than shelled out. Edits are committed in the background, the history panel expands each commit into an inline diff, and any single file can be reverted on its own.
It opens an existing Logseq vault in place, because it uses the same journals/ and pages/ folder layout. Nothing to import, nothing to convert.
Written in Swift on AppKit rather than Electron. Free for macOS.
ChainMemory
SeqLogMem0 - Your private, local memory layer for all AI tools
Logseq - Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
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.
Memori - Persistent memory from agent trace, not just conversation
Roam Research - A note-taking tool for networked thought