Zep vs CogmemAi: How to Choose an Ai Memory Layer (2026)
Zep and CogmemAi are both memory and context layers for Ai agents, built to fix the same problem: an agent that loses everything the moment a session ends. They take different paths to it. This guide lays them out fairly so you can choose with confidence.
Side by side
| Capability | CogmemAi | Zep |
|---|---|---|
| Long-term memory benchmark | Highest published LongMemEval score, 95.10%, plus 91% on LoCoMo (above human baseline) | Publishes its own memory benchmarks |
| Memory model | Multi-strategy retrieval with semantic recall and a knowledge-graph linker that surfaces related and conflicting memories | Temporal knowledge graph approach |
| Works with | Claude, ChatGPT, Gemini, and any MCP-compatible tool (Claude Code, Cursor, Windsurf, Cline) | Model and framework support via its SDK |
| Deployment | Cloud-hosted, zero-config local (private), or hybrid | Cloud service and self-hosting options |
| Interface | MCP server (35 tools), zero-install remote endpoint, REST API, Chrome extension | SDK and API |
| Privacy | Local mode keeps memory on your own machine; quantum-safe at-rest encryption | Self-hosting available for data control |
| Teams and compliance | Shared team memory, per-tenant isolation, mandatory rules in every response | Team and platform features |
| Free tier | Yes | Free and paid tiers |
Recall quality
A memory layer is only as good as what it brings back. CogmemAi was tuned and measured against LongMemEval, the hardest public long-term-memory test, where it scored 95.10%, the highest published result, plus 91% on LoCoMo, above the human baseline. If you are choosing on recall accuracy, that published figure is the clearest signal available.
How memory is modeled
Zep is well known for representing memory as a temporal knowledge graph, which suits teams that want relationships and time built into the structure. CogmemAi combines dense semantic retrieval with a knowledge-graph linker that connects related memories at write time and flags conflicting ones on recall, so contradictions surface instead of quietly competing. Both are valid designs; the right one depends on how you want memory to behave.
Deployment and privacy
CogmemAi runs cloud-hosted, in a zero-config local mode that keeps every memory on your own machine, or hybrid, with quantum-safe at-rest encryption. Zep offers a cloud service and self-hosting for teams that want to run their own stack.
How they connect to your Ai
CogmemAi ships as an MCP server with 35 tools, so it drops into Claude Code, Cursor, Windsurf, Cline, and any MCP-compatible tool, plus a remote endpoint, a REST API, and a Chrome extension. Zep connects through its SDK and API, which fits teams wiring memory into their own application code.
When Zep might be the better fit
Honest answer: if a temporal knowledge graph is the model you want at the center of your agent’s memory, and you are building memory into your own stack with an SDK, Zep is a strong, well-regarded choice. CogmemAi leans toward teams that want top recall accuracy, private or hybrid deployment, and memory that works across many Ai tools without building it themselves.
Try CogmemAi free
CogmemAi has a free tier, so you can add persistent memory to your agents today and judge the recall quality yourself.
Frequently asked questions
- Is CogmemAi better than Zep?
- They target the same problem differently. CogmemAi holds the highest published LongMemEval score (95.10%), runs cloud or fully local, and works across Claude, ChatGPT, and any MCP tool out of the box. Zep is known for a temporal knowledge-graph approach via its SDK. Choose CogmemAi for recall accuracy, private deployment, and cross-tool memory; choose Zep if a temporal knowledge graph is central to your design.
- What is the highest published LongMemEval score?
- 95.10%, achieved by CogmemAi. LongMemEval is the field’s hardest long-term-memory benchmark.
- Does CogmemAi support a knowledge graph?
- Yes. CogmemAi links related memories at write time and detects conflicting memories on recall, alongside dense semantic retrieval.
- Can CogmemAi run locally and privately?
- Yes. CogmemAi has a zero-config local mode, so memory stays on your own machine, with quantum-safe at-rest encryption.
- Is there a free version of CogmemAi?
- Yes. CogmemAi has a free tier; start at no cost and upgrade only if you need higher limits.