# Cognee vs Letta — Fit & Features

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

Compare Cognee and Letta by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### Cognee
Prepare connected knowledge and memory for AI applications.
Best fit: Developers building grounded assistants with persistent context and retrieval.
- Knowledge graphs
- Agent memory
- Data ingestion
Before you choose: Test retrieval quality, deletion behavior, access boundaries, and retention. Compare hosting and embedding costs for your data.
Pricing: https://www.cognee.ai/pricing
- [Read Cognee profile](https://trutool.co/tools/cognee): Read Cognee profile

### Letta
Build agents that retain and manage state and memory across interactions.
Best fit: Developers building grounded assistants with persistent context and retrieval.
- Stateful agents
- Agent memory
- Agent APIs
Before you choose: Test retrieval quality, deletion behavior, access boundaries, and retention. Compare hosting and embedding costs for your data.
Pricing: https://www.letta.com
- [Read Letta profile](https://trutool.co/tools/letta): Read Letta profile