HydraDB

HydraDB is a persistent agent memory system that raised $6.5M to solve the session-gap problem standard context windows ignore, enabling AI agents to maintain continuous, long-term state across interactions.

Two-hop subgraph: this entity, every entity it directly relates to, and every entity those neighbors relate to. Drag a node, scroll to zoom, click to inspect — or click any neighbor and re-center the atlas there.