# DSPy vs Haystack — Fit & Features

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

Compare DSPy and Haystack by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### DSPy
Program and optimize language model pipelines with structured modules.
Best fit: Developers composing agents, structured model outputs, and tool workflows.
- LM programs
- Pipeline optimization
- Evaluation workflows
Before you choose: Check licensing, provider compatibility, maintenance, and tool permissions. Test failure recovery before enabling agent actions.
Pricing: https://dspy.ai/current/
- [Read DSPy profile](https://trutool.co/tools/dspy): Read DSPy profile

### Haystack
Framework for retrieval-augmented generation and AI agent pipelines.
Best fit: Developers building and evaluating custom agents.
- Framework for retrieval-augmented generation and AI agent pipelines
Before you choose: Check licensing, maintenance status, supported providers, and hosting or inference costs.
Pricing: https://haystack.deepset.ai/
- [Read Haystack profile](https://trutool.co/tools/haystack): Read Haystack profile