promptfoo vs Ragas

Pick two tools from the same category to compare side-by-side.

	promptfoo Open-source CLI for prompt and LLM eval, including red-teaming.	Ragas Open-source Python framework for evaluating RAG pipelines with model-based, largely reference-free metrics.
Category	eval	eval
Vendor type	open source	open source
Pricing	free	free
Strengths	+ Open source, CLI-first + Strong red-team / security eval modules + Easy to wire into CI	+ Reference-free metrics reduce the need for human-labeled ground truth + Research-grounded RAG metrics: faithfulness, relevancy, context precision/recall + Synthetic test set generation for bootstrapping evaluation datasets + Integrations with LangChain, LlamaIndex, and tracing platforms
Tradeoffs	− Less polished UI than commercial alternatives	− LLM-judged scores can be inconsistent across runs and judge models, and add token cost − Scoped primarily to RAG; weaker coverage for agentic or general LLM app evaluation − Absolute metric values are hard to interpret without a baseline
Used in stacks	3	0