The State of Memory in Java AI Agents (April 2026)

This post was originally published on jamjet.dev. TL;DR If you're building AI agents in Java today, your options for persistent memory range from "store the last 20 chat messages in Postgres" to "run a Python service in a sidecar container and call it over HTTP." There is no Java-native equivalent to Mem0, Zep, or Letta — the libraries Python developers reach for when they need real memory. This post is a tour of every option a Java developer has in April 2026, why most of them st