Zep Review 2026

Enterprise agent memory built on temporal Context Graphs (Graphiti) with millisecond retrieval, SOC 2 Type II, and HIPAA BAA.

Zep is an enterprise-focused memory layer for AI agents, structured around temporal Context Graphs rather than a flat vector store of past messages. The underlying engine, Graphiti, ingests every signal an agent touches — chat history, business data, user attributes, webhook events — and builds a graph of entities, relationships, and facts that track not only what was said but when it became true, when it stopped being true, and who it applies to. At query time, Zep assembles a focused context bundle in roughly 200 milliseconds, which is the kind of latency that lets memory survive in front-of-user agent flows where anything above 500ms feels broken. The product positioning in 2026 has shifted from "agent memory" toward the Context Lake — millions of governed context graphs served as one system, with access control, retention, provenance, and audit baked in.

Pricing changed in 2026 to a simpler credit-based model. Episodes (any chat message, JSON payload, or text block sent to Zep) cost 1 credit per 350 bytes, rounded up — so a 640-byte Episode is 2 credits and a 1,200-byte Episode is 4 credits. Storage, retrieval, memory, and users are unmetered; you only pay for ingestion. Free gives 1,000 credits/month with no rollover, two projects, and variable rate limits. Flex at $125/month includes 50,000 credits, auto top-up at 20%, 30-day rollover, 600 RPM, and five projects. Flex Plus at $375/month bumps that to 200,000 credits, 1,000 RPM, 10 projects, webhooks, analytics, custom extraction instructions, and seven-day API log retention. Enterprise unlocks SOC 2 Type II controls under contract, a HIPAA BAA, one-year audit/API log retention, guaranteed rate limits, and Cloud / Cloud + BYOK / BYOC deployment options.