Memory
Persistent state across turns / sessions / users.
Zep
Temporal knowledge graph memory for agents (Graphiti under the hood).
used in
6
hybrid
freemium
mem0
Per-user long-term memory layer for agents with fact extraction.
used in
4
hybrid
freemium
Cognee
Open-source memory platform that gives AI agents persistent long-term memory via combined knowledge graphs and vector embeddings.
used in
0
hybrid
freemium
Graphiti
Open-source temporal knowledge-graph framework from Zep for building agent memory.
used in
0
hybrid
freemium
Letta
Stateful agent memory framework (formerly MemGPT); core+archival tiers.
used in
0
open source
freemium
Supermemory
Closed-source universal memory API that adds long-term, personalized memory to AI agents and apps.
used in
0
commercial
freemium