Agent memory built for production
Zep vs Mem0 on LoCoMo and LongMemEval, plus the customization, governance, and scale that production agents need.
Zep: More accurate, far faster, more token efficient
Zep and mem0 run on the same long-running memory benchmarks: LoCoMo (1,540 questions) and LongMemEval (500 questions). Same reader prompts. Same judge. The retrieval stack is what varies.
Zep wins every category: multi-hop, temporal, open-domain, single-hop.
LongMemEval
500 questions · top-k retrievalZep accuracy
at p50 · 104 ms vs 2,470 ms
4,408 vs 6,787 tokens
Same accuracy at comparable retrieval depth, on a third less context and an order of magnitude faster.
Mem0 stores facts from conversation. Zep ingests every source the agent touches
Any data source
Chat, JSON, app events, documents, business data. Zep ingests through a single SDK and unifies it in one graph per subject — user, customer, team, or topic.
Custom entities and edges
Define the entity types and relationships your domain needs. Zep extracts and links them at ingest, with your schema enforced.
Temporal at the data model
Every fact carries timestamps for when it became valid and when it stopped being valid. Point-in-time queries follow from the model, not from custom logic built above it.
Shared context, governed access
Share context across your organization while controlling what each user and agent can access.
Attribute-based access control
Use attributes to control what context each agent can access and what it can do with it.
Retention policies
Data expires on the schedule you set. Legal hold blocks deletion when compliance requires it.
Audit and API logs
Detailed logs of every request and access decision, ready for audit.
Millions of graphs, served in milliseconds
Zep is built on the Context Lake — millions of context graphs per deployment, served back to agents in milliseconds. In production at Fortune 500 deployments.
Sub-200ms retrieval at scale
Hot graphs held in memory, with vector and BM25 indexes alongside. One call, one ranked answer.
Deploy your way
Managed cloud, your own keys, or fully inside your VPC. The trust boundary moves with the deployment.
Context infrastructure for the enterprise.
“We can easily see Zep becoming a de facto partner in this layer of the enterprise agent stack.”
A clear fit, both ways
Choose Zep when you need:
- Facts that change over time, with point-in-time queries
- Business data integrated alongside chat — CRM, support, billing, events
- Custom entities and relationships specific to your domain
- Retrieval that holds at sub-200ms across millions of subjects
- Enterprise deployment with SOC 2 Type II, HIPAA, and BYOC
Stay with mem0 when:
- Basic chat-history memory is enough
- You don't need temporal validity or business data integration
- You're prototyping and quick setup matters more than production characteristics
Migrate to Zep
Data transfer
Step-by-step migration of your existing memory data.
Schema mapping
Map your structures to Zep's temporal graph format.
Engineering support
Direct support from Zep's team during migration.
Performance tuning
Configure retrieval depth, scopes, and budgets for your workload.
