COMPARISON MATRIX
Letta vs. Zep
Comparing stateful agent memory management architectures.
Option A
Letta (MemGPT)
Option B
Zep
| Capability / Dimension | Letta (MemGPT) | Zep |
|---|---|---|
| Memory Paradigm | Virtual memory management (OS model: core, working, archival memory) | Temporal memory server with automatic graph synthesis |
| State Management | Agent self-edits its core memory via explicit tool instructions | Background extraction engine ingests chat logs into memory graphs |
| Open Source | Yes (Letta framework / MemGPT) | Yes (Zep Community Edition) + Cloud |
| Primary Focus | Autonomous stateful agent OS | Personalized assistant memory & history backend |