MarkLogic Server
Firestore
Datomic
Valentina Server
Datahike
Matisse
Oracle TimesTen
SAP MaxDB
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.
MarkLogic Server
ChainMemoryFirestore - Easily develop rich applications using a fully managed, scalable, and serverless document database.
Mem0 - Your private, local memory layer for all AI tools
Datomic - The fully transactional, cloud-ready, distributed database
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
Memori - Persistent memory from agent trace, not just conversation