Semantic Scholar

Semantic Scholar is a free AI-powered search engine for scientific literature, indexing over 236 million papers across all fields of science, with a developer API and a beta augmented reading experience.

Semantic Scholar is a free research search engine built to help people find and understand scientific literature. Rather than relying purely on keyword matching, it applies AI to interpret the semantics of papers, aiming to surface work that is actually relevant to a query rather than just textually similar. At the time of writing, the index covers over 236 million papers spanning all fields of science, making it a general-purpose entry point for literature discovery rather than a niche, single-discipline tool. The core audience is anyone who needs to search academic literature: graduate students and faculty researchers, industry R&D teams, science journalists, and engineers building on top of scholarly data. A researcher might use it the way they'd use any search engine — typing an author's name, a topic like "economic growth," or a specific method like "dynamic time warping" — and get back ranked papers rather than manually filtering database exports. In practice, the product is expanding beyond a plain search box. Semantic Reader, currently in beta, is an augmented reading interface available for select papers that adds contextual information directly into the reading experience, intended to make dense academic writing more approachable. For developers, Semantic Scholar also offers a public API with paper search endpoints, aimed at teams building their own scholarly applications or pipelines on top of its corpus rather than using the web interface directly. Within the research-tools landscape, Semantic Scholar sits alongside general academic search engines and citation databases, differentiating itself primarily on the semantic-search angle and free, open access to its index and API. It is best understood as a discovery and search layer rather than a full reference manager, writing assistant, or peer-review platform — those needs typically require pairing it with other tools.