What are the best DeepEval alternatives in 2026?
The best open-source DeepEval alternatives in 2026 are Ragas, Promptfoo, LangChain, LlamaIndex, LightRAG. These tools cover the same use cases as DeepEval — unit testing framework for llm outputs and rag pipelines — with the advantage of being open-source, free to self-host, and backed by active communities. Top picks are ranked by GitHub stars and community adoption, so you can find a drop-in replacement that fits your workflow.
Evaluation framework for RAG pipelines
Test and evaluate LLM outputs and prompt quality
Framework for building LLM-powered applications
Data framework for LLM applications over custom data
Simple and fast RAG system with knowledge graph support
Microsoft's graph-based RAG for complex reasoning over text
Open-source AI-native vector database
End-to-end NLP framework for search and QA systems
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Last updated: Aug 28, 2026 · Curated by AI Tools Hub Editorial · About · Contact · Privacy