Agent Memory Layer Comparison 2026: Déjà Vu vs Mem0 vs Zep vs Agent Memory MCP
Introduction — Why Agent Memory Matters in 2026 Agent memory is the single most important infrastructure decision for production AI agents in 2026. Without a persistent memory layer, every agent conversation starts from scratch — no user preferences, no session history, no learned behaviors. The four leading solutions — Déjà Vu, Mem0, Zep, and Agent Memory MCP — take fundamentally different approaches to solving this problem, and choosing the wrong one can cost you in latency, privacy, vendor lock-in, or benchmark credibility. This comparison breaks down each solution’s architecture, performance, pricing, and ideal use case so you can make an informed decision for your agent stack. ...