# Comparing Persistent Memory Layers: ContextNest, Mem0, Zep

An article on Hacker News breaks down the three layers of persistent memory, comparing ContextNest, Mem0, and Zep. It explains the architecture and use cases of each tool, helping developers decide which fits their needs for long-term memory in AI applications.

**Importance:** 2/5

## Sources

### Technology
- [Hacker News](https://promptowl.ai/resources/persistent-memory-ai-agents/) — Fri, 03 Jul 2026 14:27:21 +0000