The AI-memory space is crowded and moving fast. Here is an honest, head-to-head read on where Korium sits next to Mem0, Zep, Letta and Cognee, including the places a competitor genuinely leads today. No strawmen.
They all call themselves a memory layer for agents. The real question is what each one remembers: a user's preferences, a set of facts, an agent's scratchpad, or the reasoning a whole fleet builds on.
Every product in this comparison can store something and hand it back later. That is the easy 80%. The gap between them opens on the hard part: can the memory hold reasoning that changes over time, catch its own contradictions, carry work across many agents, and never leak between tenants.
Korium is built as a substrate for exactly that. It stores typed reasoning artifacts (decisions, lessons, corrections, handoffs), not just extracted facts. It keeps a bitemporal record of what was believed and when, and isolates every tenant at the data layer itself. That is the ground we compare on below, honestly, competitor by competitor.
Korium
Reasoning substrate
Typed-relation graph memory. Stores decisions, lessons and corrections with a sense of time, catches conflicts, composes narrative recall, and isolates tenants at the data layer.
Mem0
Personalization memory
Auto-extracts facts about a user from chat and feeds them back for personalization. Broadest adoption and a mature managed, compliant service.
Zep
Temporal knowledge graph
Built on Graphiti. Stores facts as graph edges with validity windows for point-in-time correctness. The closest competitor on the temporal axis.
Letta
Stateful agent runtime
The MemGPT lineage. Memory-as-OS: the agent self-manages a context "RAM" and archival "disk." A runtime you adopt, more than a layer you drop in.
Cognee
Document-to-graph pipeline
An extract-cognify-load pipeline that turns documents into a typed, inspectable knowledge graph. Strong on structuring source material.
Read this as a map of design intent, not a scoreboard. Each product optimizes for a different job; a mark reflects whether that capability is native to the product today, indirect or partial, or simply not its focus.
| Capability | Koriumreasoning substrate | Mem0personalization | Zeptemporal graph | Lettaagent runtime | Cogneedoc pipeline |
|---|---|---|---|---|---|
| Unit of memoryWhat actually gets stored | Typed reasoning artifacts + entities | Extracted user facts | Temporal facts as edges | Agent-managed blocks | Document-derived graph |
| Point-in-time / bitemporal truthAnswer "what did we believe on this date" | |||||
| Conflict detection & supersessionNew claims reconciled against old, not stacked | |||||
| Multi-agent handoff & provenanceWork carried across a fleet of agents | |||||
| Composed narrative recallAn answer, not a list of snippets | |||||
| Code-aware memoryIndex and reason over a codebase | |||||
| Self-improving loopMeasures its own work and keeps what helps | |||||
| Laptop-to-cloud, one buildSame code single-user or multi-tenant; self-host | |||||
| Tenant isolation at the data layerEnforced by the database, not just app code | |||||
| SOC 2 / HIPAA available todayCertified, not just planned | on roadmap |
Where we're behind, we say so: Mem0 and Zep carry SOC 2 / HIPAA today; Korium's certifications are on the roadmap. Marks reflect each product's public posture and design focus as of July 2026 in a fast-moving market, so treat them as a starting point for your own evaluation, not a fixed verdict.
A comparison that only flatters itself isn't worth reading. Each of these products is good at something real. Here's the honest cut on all four.
The category's mindshare leader, the default many teams reach for first.
Where Mem0 leads
Broadest adoption, a mature managed service, and SOC 2 / HIPAA / BYOK in place today. If you want personalization memory you can turn on this afternoon, it's the safe pick.
Where Korium wins
Mem0 overwrites facts; Korium versions beliefs with a valid-time axis, catches contradictions, and stores reasoning (decisions and their lineage), not just a user's preferences.
The one whose temporal story overlaps ours, so take it seriously.
Where Zep leads
A genuinely strong temporal knowledge graph with point-in-time correctness, plus enterprise compliance today. On "memory with a sense of time," Zep is the real competition.
Where Korium wins
Zep models temporal facts about entities. Korium models typed reasoning: decisions, lessons, corrections. It carries that across a multi-agent fleet with handoff provenance, indexes code, and runs a self-improving loop on top.
A different category: a runtime, not a drop-in layer.
Where Letta leads
The MemGPT lineage gives it a compelling model for long-running, self-directed agents that manage their own context. If you're building the agent itself, its OS metaphor is elegant.
Where Korium wins
Letta asks you to adopt its runtime. Korium sits underneath any agent (Claude Code, your app, anything over a wire) as shared, governed memory, without rebuilding how your agents run.
Strongest at turning documents into structure.
Where Cognee leads
Its extract-cognify-load pipeline builds a typed, inspectable knowledge graph from source documents. For structuring a corpus into clean entities and relations, it's purpose-built.
Where Korium wins
Cognee structures documents; Korium is live agent memory: bitemporal, conflict-resolving, multi-tenant with data-layer isolation. Cognee doesn't advertise SOC 2 / HIPAA, which rules it out of regulated workloads Korium is built to enter.
The field converges on storing and retrieving. Korium is built for the harder job underneath it: reasoning that revises itself, survives handoffs, understands code, and never crosses a tenant boundary.
Mem0 for fast, compliant user memory. Zep when temporal facts about entities are the whole requirement and you need certs today.
Typed decisions and lessons, bitemporal truth, conflict resolution, multi-agent handoffs, and code-awareness, all in one substrate under everything you run.
SOC 2 / HIPAA are on our roadmap, not yet certified. For regulated production today, that's a real gap, and one we're closing deliberately, in the open.
Point an agent at Korium and watch it stop starting from zero, then judge it next to whatever you're running now. Explore the product, or talk to us about what you're building.
See Korium plans
