# pgvector vs Zep — Fit & Features

Canonical: https://trutool.co/compare/pgvector-vs-zep
Author: Snehil (https://trutool.co/authors/snehil)

Compare pgvector and Zep by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### pgvector
Add vector similarity search to PostgreSQL using an open-source extension.
Best fit: Developers building grounded assistants with persistent context and retrieval.
- PostgreSQL vectors
- Similarity search
- Vector indexing
Before you choose: Test retrieval quality, deletion behavior, access boundaries, and retention. Compare hosting and embedding costs for your data.
Pricing: https://github.com/pricing
- [Read pgvector profile](https://trutool.co/tools/pgvector): Read pgvector profile

### Zep
Provide AI agents with memory and contextual knowledge from ongoing interactions.
Best fit: Developers building grounded assistants with persistent context and retrieval.
- Agent memory
- Context engineering
- Knowledge graphs
Before you choose: Test retrieval quality, deletion behavior, access boundaries, and retention. Compare hosting and embedding costs for your data.
Pricing: https://www.getzep.com/pricing/
- [Read Zep profile](https://trutool.co/tools/zep): Read Zep profile