scite
Free tierSmart citation tool that shows how scientific papers have been cited
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Scite is a freemium AI research platform founded in 2020 and headquartered in Henderson, USA. It exposes an API for programmatic access to its corpus of 317M+ full-text scholarly articles and 1.6B+ citations, sourced through agreements with 44+ publishers. Its core technical differentiator is Smart Citations — a citation classification system that labels each citation as supporting, contrasting, or mentioning a claim, linked to the specific sentence in the source paper. Coverage extends beyond journal articles to patents, clinical trials, grants, preprints, and datasets. Integrations are available for Zotero, Claude, ChatGPT, and MCP. The project has 872 GitHub stars and offers open-source components. Pricing starts at $20/month (billed yearly), with a 7-day free trial.