LedgerMind
Tolaria
Mem0
Hacker Noon
SAME (Stateless Agent Memory Engine)
Contextify
Klee
Alma by Olivares.AI
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.
LedgerMind
ChainMemoryTolaria - Organize your notes as Markdown files. With native relationships, Git, and Claude Code integration. Free forever.
Mem0 - Your private, local memory layer for all AI tools
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Hacker Noon - How hackers start their afternoons.
Memori - Persistent memory from agent trace, not just conversation
SAME (Stateless Agent Memory Engine) - Your AI picks up where it left off. One memory across Claude Code, Cursor, Windsurf, Codex CLI, Gemini CLI, and every MCP tool. Local, private, zero cloud. Memory with provenance.