What are the best Promptfoo alternatives in 2026?
The best open-source Promptfoo alternatives in 2026 are DeepEval, Ragas, DSPy, Guidance, LM Evaluation Harness. These tools cover the same use cases as Promptfoo — test and evaluate llm outputs and prompt quality — 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.
Unit testing framework for LLM outputs and RAG pipelines
Evaluation framework for RAG pipelines
Programming—not prompting—language models
Efficient control and templating for language models
Framework for evaluating language models on NLP tasks
AI observability platform for LLM tracing and evaluation
ML and LLM monitoring and evaluation platform
State-of-the-art ML models for NLP, vision and audio
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Last updated: Aug 28, 2026 · Curated by AI Tools Hub Editorial · About · Contact · Privacy