MarkLogic Server
Firestore
Datomic
Valentina Server
Datahike
Matisse
Oracle TimesTen
SAP MaxDB
Agentmemory
ChainMemory
Mem0
Memori
Pieces for Developers
cognee
TheSecondBrain.dev
Claiv Memory
MarkLogic Server
AgentmemoryFirestore - Easily develop rich applications using a fully managed, scalable, and serverless document database.
ChainMemory - Portable, verifiable memory for AI agents โ works across ChatGPT, Claude, Gemini and any MCP client
Datomic - The fully transactional, cloud-ready, distributed database
Mem0 - Your private, local memory layer for all AI tools
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
Memori - Persistent memory from agent trace, not just conversation