Semantic Scholar
Semantic Scholar is a free AI-powered research tool that searches papers from all fields of science. It is mainly used to find literature, follow citations, and pull publication data through a developer API.
#21 in AI AssistantsAI Research ToolsFree plan
Who it's for
Best for
Researchers building automated literature pipelines with the free API
Developers who need programmatic paper search without request blocks
Not for
- Humanities researchers whose fields the science-focused corpus covers poorly
Anyone who needs citation counts to match larger scholarly indexes
Features
Literature search
A single search box covers 239,987,696 papers from all fields of science, with sample queries such as electronegativity and mercury poisoning shown on the home page.
Semantic Reader beta
Augmented reader for select papers that provides contextual scientific reading.
Developer API
Paper search API with updated documentation and increased stability for building scholarly applications.
Free account
Free account creation and sign-in located in the site menu for an AI-powered scientific index based at Ai2.
What users say
Pros
- Scripted queries run through the developer API, an access route other scholarly indexes block.
- Delivers more relevant academic search results than competing scholarly search platforms.
- Works inside automated research and retrieval pipelines, such as agents that search papers while building software.
Cons
- The web interface loads slowly and feels obscure to navigate.
- Folder recommendations stay in the general area of a topic, and repeated thumbs-down makes recommendations dry up.
- Profiles splinter into duplicate entries for names with accented characters, scattering newly published papers across multiple records.
- Mismatched papers get linked to profiles, with no built-in reporting mechanism to correct the errors.
- Books can show a couple of citations where other indexes list many more, so counts look incomplete.
A selection of the review sources we used:
Summarized from public user reviews and community discussions. View details
Global Traffic Rank
Top 100k
Alternatives
Rank#21 in category#7 in category#9 in category#11 in category
Free planYesYesYesYes
ProOpen API, top-ranked search, fits research pipelinesClear, current answers backed by sourcesReal citations, faster literature search, paper reading helpSurfaces relevant papers, cited summaries, and quality rankings
Better forSummarizing evidence across papers to answer specific research questionsExtracting structured data and screening papers for systematic reviews
Weaker atConducting high-volume paper searches without monthly query limitsSearching broad literature archives beyond its 138 million indexed papers