The 12 best search engines for research papers in 2026, by field

Exa’s guide surveys 12 research-paper search engines in 2026, grouping them into broad multidisciplinary tools and specialized databases while recommending combinations by discipline. General services such as Google Scholar, Semantic Scholar, BASE, CORE, Dimensions, and Exa offer wide coverage, citation features, open-access discovery, or links between publications, grants, datasets, and policy documents, whereas PubMed, IEEE Xplore, JSTOR, arXiv, SSRN, and ERIC serve fields including medicine, engineering, humanities, preprints, social sciences, and education. The guide emphasizes that researchers benefit from using both broad and subject-specific sources to improve coverage and access full text. It also presents Exa’s API-based publication index of roughly 350 million records as an option for developers building semantic research tools, highlighting its natural-language search, cited metadata, and passages supporting returned results.

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