Popular relevance evaluation toolkits used to measure and improve search and AI-driven retrieval systems include trec_eval, pytrec_eval, Ranx, BEIR, PyTerrier, Ragas, DeepEval, ir-measures, Elasticsearch/OpenSearch ranking evaluation APIs, and Arize Phoenix. These tools help data scientists and search engineers evaluate ranking quality using key metrics such as NDCG, precision, recall, MAP, and Mean Reciprocal Rank (MRR). Traditional frameworks like trec_eval and BEIR are widely used in research for benchmarking search algorithms, while newer tools such as Ragas and DeepEval support modern AI systems including semantic search and Retrieval-Augmented Generation (RAG). Many platforms also integrate with machine learning pipelines and automated testing workflows, making it easier to evaluate models at scale. Enterprise teams often prefer scalable, integrated solutions, while researchers commonly rely on flexible open-source toolkits for experimentation and analysis.