The best places to find sources for your research.
A curated directory of databases, archives, libraries, and tools — organized by subject, content type, and access level.
113 sources and counting · Curated by the Sourclip team
Science & Medicine
arXiv(Free) — Open-access preprints in physics, math, CS, AI, biology, and economics. Best for: Researchers · Scientists · AI practitioners
PubMed(Free) — 40M+ citations for biomedical literature from MEDLINE and life science journals. Best for: Medical researchers · Healthcare professionals
Semantic Scholar(Free) — AI-powered academic search with 200M+ papers and citation graph analysis. Best for: Researchers · Scientists
Connected Papers(Freemium) — Visual citation graph that maps related papers — explore a research field at a glance. Best for: Researchers building literature reviews
IEEE Xplore(Paid) — Authoritative database for IEEE journals, standards, and conference proceedings in tech. Best for: Engineers · Computer scientists · Technical researchers
Nature(Freemium) — One of the world's leading multidisciplinary science journals since 1869. Best for: Scientists · Medical professionals · Science writers
PLOS ONE(Open Access) — Open-access peer-reviewed journal covering all areas of science and medicine. Best for: Researchers · Students
bioRxiv(Free) — Free preprint server for life sciences research before peer review. Best for: Life scientists · Biomedical researchers
medRxiv(Free) — Preprint server for clinical and public health research before peer review. Best for: Medical researchers · Clinicians · Public health professionals
CDC Data & Statistics(Free) — Open data portal from the US Centers for Disease Control with public health datasets. Best for: Public health researchers · Data analysts
NIH National Library of Medicine(Free) — The world's largest biomedical library — databases, digital collections, and health info. Best for: Medical researchers · Healthcare professionals
Cochrane Library(Freemium) — Gold-standard systematic reviews and meta-analyses for evidence-based medicine. Best for: Clinicians · Medical researchers · Evidence-based practitioners
ClinicalTrials.gov(Free) — Database of 400,000+ clinical studies across all medical conditions worldwide. Best for: Medical researchers · Clinicians · Patient advocates
PubMed Central(Free) — Full-text free archive of biomedical and life sciences journal articles from NIH. Best for: Biomedical researchers · Medical students
Our World in Data(Free) — Research and data on global problems: health, poverty, climate, education, and more. Best for: Journalists · Researchers · Policy analysts
MIT OpenCourseWare(Free) — Free lecture notes, exams, and videos from 2,500+ MIT courses. Best for: Students · Self-learners · Researchers
edX(Freemium) — Courses from MIT, Harvard, Berkeley, and 160+ universities — many free to audit. Best for: Students · Professionals · Lifelong learners
Elicit(Freemium) — AI research assistant that finds and summarizes relevant academic papers automatically. Best for: Researchers · Graduate students · Scientists
Consensus(Freemium) — Ask research questions and get AI-synthesized answers sourced from peer-reviewed papers. Best for: Researchers · Healthcare professionals · Students
Wolfram Alpha(Freemium) — Computational knowledge engine for math, science, data, and factual queries. Best for: STEM students · Data researchers · Scientists
Stack Exchange(Free) — Network of Q&A communities covering programming, mathematics, science, and academic research. Best for: Developers · STEM researchers
Web of Science(Paid) — A trusted publisher-independent global citation database for academic and scientific research. Best for: Academics · Scientific researchers
Scopus(Paid) — Elsevier's massive abstract and citation database of peer-reviewed literature and scientific journals. Best for: Academics · Scientific researchers
Sci-Hub(Free) — A shadow library providing widespread free access to millions of paywalled academic papers. Best for: Researchers needing paywall bypass
Dryad(Free) — An international open-access repository of research data, especially strong in life sciences and medicine. Best for: Researchers · Data scientists
SciELO(Open Access) — A bibliographic database and digital library of open access journals, primarily focusing on Latin America. Best for: Researchers seeking Latin American scientific literature
AI & Technology
arXiv(Free) — Open-access preprints in physics, math, CS, AI, biology, and economics. Best for: Researchers · Scientists · AI practitioners
Semantic Scholar(Free) — AI-powered academic search with 200M+ papers and citation graph analysis. Best for: Researchers · Scientists
Connected Papers(Freemium) — Visual citation graph that maps related papers — explore a research field at a glance. Best for: Researchers building literature reviews
Papers With Code(Free) — ML papers with linked code implementations, benchmarks, and datasets. Best for: ML researchers · AI practitioners · Engineers
Hugging Face Papers(Free) — Daily AI/ML paper highlights from arXiv, curated by the Hugging Face community. Best for: AI researchers · ML engineers
AI Alignment Forum(Free) — Technical discussions and research on AI safety, alignment, and existential risk. Best for: AI safety researchers · Policy professionals
Distill(Free) — Peer-reviewed ML research with interactive visualizations and clear explanations. Best for: ML students · AI researchers
IEEE Xplore(Paid) — Authoritative database for IEEE journals, standards, and conference proceedings in tech. Best for: Engineers · Computer scientists · Technical researchers
ACM Digital Library(Freemium) — Full-text database of ACM publications on computing and information technology. Best for: Computer scientists · Software researchers
The Gradient(Free) — Accessible articles and perspectives on AI research from experts in the field. Best for: AI enthusiasts · Researchers · Writers
Google DeepMind Research(Free) — Primary research publications and blog posts from DeepMind scientists. Best for: AI researchers · Professionals
MIT OpenCourseWare(Free) — Free lecture notes, exams, and videos from 2,500+ MIT courses. Best for: Students · Self-learners · Researchers
Coursera(Freemium) — Online courses and degrees from 300+ universities — Yale, Stanford, Google, and more. Best for: Professionals · Students · Career changers
edX(Freemium) — Courses from MIT, Harvard, Berkeley, and 160+ universities — many free to audit. Best for: Students · Professionals · Lifelong learners
Kaggle Datasets(Free) — Community-driven platform with 680,000+ datasets across every subject imaginable. Best for: Data scientists · ML researchers · Analysts
UCI ML Repository(Free) — Curated datasets widely used as benchmarks in ML research, maintained by UC Irvine. Best for: ML researchers · Data science students
Elicit(Freemium) — AI research assistant that finds and summarizes relevant academic papers automatically. Best for: Researchers · Graduate students · Scientists
GitHub(Free) — The world's largest platform for open-source code, essential for AI, technology, and computational research. Best for: Software engineers · AI researchers · Data scientists
Stack Exchange(Free) — Network of Q&A communities covering programming, mathematics, science, and academic research. Best for: Developers · STEM researchers
Business & Finance
SSRN(Free) — Preprint repository for social science, economics, law, and business research. Best for: Social scientists · Economists · Law researchers
SEC EDGAR(Free) — Full-text search of public company filings — 10-Ks, 10-Qs, and earnings reports. Best for: Founders · Investors · Financial researchers
Crunchbase(Freemium) — Startup and company intelligence: funding rounds, investors, acquisitions, and leadership. Best for: Founders · Investors · Market researchers
Statista(Freemium) — 1M+ statistics, market data, and consumer insights across 80,000+ topics. Best for: Business analysts · Content creators · Researchers
World Bank Open Data(Free) — Free access to global development data from the World Bank — 16,000+ indicators. Best for: Economists · Policy researchers · Students
IMF Data(Free) — IMF datasets on economic indicators, exchange rates, trade, and global finance. Best for: Economists · Policy analysts · Business researchers
Our World in Data(Free) — Research and data on global problems: health, poverty, climate, education, and more. Best for: Journalists · Researchers · Policy analysts
Harvard Business Review(Freemium) — Research-backed articles on management, leadership, strategy, and business innovation. Best for: Business leaders · Founders · Management students
McKinsey Global Institute(Free) — In-depth research reports on global economics, technology trends, and business strategy. Best for: Business analysts · Consultants · Strategy researchers
FRED Economic Data(Free) — 816,000+ economic time series from 107 sources — maintained by the St. Louis Fed. Best for: Economists · Analysts · Finance students
Gallup(Freemium) — Public opinion polling, workplace analytics, and global research reports. Best for: Business researchers · Journalists · Social scientists
IZA World of Labor(Free) — Evidence-based articles on labor economics and social policy from global experts. Best for: Economists · Policy researchers · HR professionals
Coursera(Freemium) — Online courses and degrees from 300+ universities — Yale, Stanford, Google, and more. Best for: Professionals · Students · Career changers
UN Data(Free) — Global statistics from UN agencies on population, trade, health, and development. Best for: Policy researchers · Global analysts
OECD Data(Free) — Economic and social statistics from OECD member countries on employment, education, and trade. Best for: Economists · Policy analysts · Business researchers
Nasdaq Data Link(Freemium) — Financial and alternative datasets for quantitative research and economic modeling. Best for: Quantitative researchers · Finance analysts
RePEc(Free) — Research Papers in Economics — a central, decentralized repository for economics research. Best for: Economists · Financial researchers
LexisNexis(Paid) — The gold standard for legal research, providing access to legal, regulatory, and business information. Best for: Lawyers · Legal researchers · Law students
National Bureau of Economic Research(Freemium) — Essential working papers and datasets for economics and business researchers. Best for: Economists · Business researchers
History & Humanities
JSTOR(Freemium) — Millions of academic articles, books, and primary sources in humanities and social sciences. Best for: Students · Humanities researchers
Internet Archive(Free) — Digital library of millions of books, movies, music, websites, and historical documents. Best for: Writers · Historians · General researchers
Project Gutenberg(Free) — 70,000+ free public domain e-books, primarily classic literature and historical texts. Best for: Writers · Literature students · Historians
Project MUSE(Freemium) — Digital humanities and social science journals from leading university presses. Best for: Humanities students · Social science researchers
HathiTrust Digital Library(Free) — 17M+ digitized volumes from research libraries — many fully readable in public domain. Best for: Historians · Literature researchers · Writers
Europeana(Free) — 50M+ digitized items from European museums, libraries, and archives. Best for: European history researchers · Cultural studies
Digital Public Library of America(Free) — Unified search across millions of items from US libraries, archives, and museums. Best for: American history researchers · Educators
Perseus Digital Library(Free) — Classical texts in Greek, Latin, and English with scholarly commentaries and tools. Best for: Classical scholars · Ancient history researchers
Library of Congress(Free) — The world's largest library — digitized manuscripts, maps, photos, and recordings. Best for: American history researchers · Archivists · Writers
British Library(Free) — Digital access to rare manuscripts, newspapers, maps, and historical documents. Best for: British history researchers · Humanities scholars
Wikisource(Free) — Free library of public domain texts, transcribed from scanned originals. Best for: Humanities students · Writers · Researchers
Yale Open Courses(Free) — Free access to Yale's most popular introductory courses, with video lectures and syllabi. Best for: Students · Self-learners
Stanford Encyclopedia of Philosophy(Free) — Peer-reviewed reference on philosophy topics, maintained by Stanford scholars. Best for: Philosophy students · Humanities researchers
PhilPapers(Freemium) — A comprehensive index and bibliography of philosophy research, books, and articles. Best for: Philosophy students · Humanities researchers
Law & Government
SSRN(Free) — Preprint repository for social science, economics, law, and business research. Best for: Social scientists · Economists · Law researchers
Library of Congress(Free) — The world's largest library — digitized manuscripts, maps, photos, and recordings. Best for: American history researchers · Archivists · Writers
Congress.gov(Free) — Official source for US legislation, bill tracking, and congressional records. Best for: Policy researchers · Law students · Journalists
GovInfo(Free) — Official publications from all three branches of the US federal government. Best for: Policy researchers · Legal professionals
Supreme Court Opinions(Free) — Official archive of all US Supreme Court opinions and orders — free and searchable. Best for: Law students · Legal researchers · Journalists
data.europa.eu(Free) — Datasets from EU institutions — policy, statistics, research, and government data. Best for: EU policy researchers · Journalists · Data analysts
Justia(Free) — Free access to US federal and state laws, court opinions, and legal resources. Best for: Law students · Legal researchers
HeinOnline(Paid) — Comprehensive database of law journals, statutes, and treaties — image-based PDFs. Best for: Law researchers · Legal professionals
Google Scholar Case Law(Free) — Free full-text search of US federal and state court opinions via Google Scholar. Best for: Law students · Researchers · Legal writers
Data.gov(Free) — The US government's open data portal with 540,000+ datasets from federal agencies. Best for: Policy researchers · Data analysts · Journalists
ProPublica(Free) — Independent investigative journalism with public data tools and document archives. Best for: Investigative journalists · Policy researchers
LexisNexis(Paid) — The gold standard for legal research, providing access to legal, regulatory, and business information. Best for: Lawyers · Legal researchers · Law students
Psychology & Social Science
JSTOR(Freemium) — Millions of academic articles, books, and primary sources in humanities and social sciences. Best for: Students · Humanities researchers
SSRN(Free) — Preprint repository for social science, economics, law, and business research. Best for: Social scientists · Economists · Law researchers
Project MUSE(Freemium) — Digital humanities and social science journals from leading university presses. Best for: Humanities students · Social science researchers
APA PsycNet(Freemium) — Authoritative database of psychological research from the American Psychological Association. Best for: Psychology researchers · Mental health professionals
Pew Research Center(Free) — Nonpartisan data and analysis on social trends, public opinion, and demographics. Best for: Journalists · Social researchers · Policy analysts
Gallup(Freemium) — Public opinion polling, workplace analytics, and global research reports. Best for: Business researchers · Journalists · Social scientists
Journal of Open Psychology Data(Open Access) — Peer-reviewed datasets and data papers in psychology available for reuse. Best for: Psychology researchers · Data scientists
IZA World of Labor(Free) — Evidence-based articles on labor economics and social policy from global experts. Best for: Economists · Policy researchers · HR professionals
RePEc(Free) — Research Papers in Economics — a central, decentralized repository for economics research. Best for: Economists · Financial researchers
ICPSR(Freemium) — Inter-university Consortium for Political and Social Research — massive social science data archive. Best for: Social scientists · Policy researchers
Education & Learning
Khan Academy(Free) — Free video lessons covering math, science, computing, history, and humanities. Best for: Students · Self-learners
MIT OpenCourseWare(Free) — Free lecture notes, exams, and videos from 2,500+ MIT courses. Best for: Students · Self-learners · Researchers
Coursera(Freemium) — Online courses and degrees from 300+ universities — Yale, Stanford, Google, and more. Best for: Professionals · Students · Career changers
edX(Freemium) — Courses from MIT, Harvard, Berkeley, and 160+ universities — many free to audit. Best for: Students · Professionals · Lifelong learners
ERIC(Free) — Education Resources Information Center — 1.7M+ education research publications. Best for: Education researchers · Teachers · Policy analysts
TED Talks(Free) — 4,000+ talks from leading thinkers on science, technology, design, and culture. Best for: Writers · Students · Curious generalists
Yale Open Courses(Free) — Free access to Yale's most popular introductory courses, with video lectures and syllabi. Best for: Students · Self-learners
Stanford Encyclopedia of Philosophy(Free) — Peer-reviewed reference on philosophy topics, maintained by Stanford scholars. Best for: Philosophy students · Humanities researchers
Open Library(Free) — Over 3 million books to borrow digitally through the Internet Archive's library system. Best for: Students · Researchers · Writers
YouTube(Free) — The world's largest video library — documentaries, lectures, interviews, and tutorials. Best for: Everyone · Researchers · Content creators
Vimeo(Freemium) — High-quality videos from filmmakers, artists, and educators — a quieter alternative to YouTube. Best for: Filmmakers · Artists · Creative researchers
Stack Exchange(Free) — Network of Q&A communities covering programming, mathematics, science, and academic research. Best for: Developers · STEM researchers
PhilPapers(Freemium) — A comprehensive index and bibliography of philosophy research, books, and articles. Best for: Philosophy students · Humanities researchers
Data & Statistics
CDC Data & Statistics(Free) — Open data portal from the US Centers for Disease Control with public health datasets. Best for: Public health researchers · Data analysts
Statista(Freemium) — 1M+ statistics, market data, and consumer insights across 80,000+ topics. Best for: Business analysts · Content creators · Researchers
World Bank Open Data(Free) — Free access to global development data from the World Bank — 16,000+ indicators. Best for: Economists · Policy researchers · Students
IMF Data(Free) — IMF datasets on economic indicators, exchange rates, trade, and global finance. Best for: Economists · Policy analysts · Business researchers
Our World in Data(Free) — Research and data on global problems: health, poverty, climate, education, and more. Best for: Journalists · Researchers · Policy analysts
FRED Economic Data(Free) — 816,000+ economic time series from 107 sources — maintained by the St. Louis Fed. Best for: Economists · Analysts · Finance students
data.europa.eu(Free) — Datasets from EU institutions — policy, statistics, research, and government data. Best for: EU policy researchers · Journalists · Data analysts
Kaggle Datasets(Free) — Community-driven platform with 680,000+ datasets across every subject imaginable. Best for: Data scientists · ML researchers · Analysts
Data.gov(Free) — The US government's open data portal with 540,000+ datasets from federal agencies. Best for: Policy researchers · Data analysts · Journalists
Google Dataset Search(Free) — Google's dedicated search engine for datasets — indexes millions from repositories worldwide. Best for: Data scientists · Researchers · Analysts
UCI ML Repository(Free) — Curated datasets widely used as benchmarks in ML research, maintained by UC Irvine. Best for: ML researchers · Data science students
UN Data(Free) — Global statistics from UN agencies on population, trade, health, and development. Best for: Policy researchers · Global analysts
OECD Data(Free) — Economic and social statistics from OECD member countries on employment, education, and trade. Best for: Economists · Policy analysts · Business researchers
Zenodo(Free) — Open repository from CERN for research data, software, reports, and presentations. Best for: Researchers · Data scientists
Nasdaq Data Link(Freemium) — Financial and alternative datasets for quantitative research and economic modeling. Best for: Quantitative researchers · Finance analysts
Wolfram Alpha(Freemium) — Computational knowledge engine for math, science, data, and factual queries. Best for: STEM students · Data researchers · Scientists
GitHub(Free) — The world's largest platform for open-source code, essential for AI, technology, and computational research. Best for: Software engineers · AI researchers · Data scientists
ICPSR(Freemium) — Inter-university Consortium for Political and Social Research — massive social science data archive. Best for: Social scientists · Policy researchers
Mendeley Data(Free) — A free and secure cloud-based repository where researchers can store and share their data. Best for: Researchers · Data scientists
Dryad(Free) — An international open-access repository of research data, especially strong in life sciences and medicine. Best for: Researchers · Data scientists
News & Current Events
Reuters(Freemium) — International news agency — primary source for breaking news and financial wire services. Best for: Journalists · Researchers · Professionals
AP News(Free) — Nonpartisan breaking news from the Associated Press, the wire service of record. Best for: Journalists · Students · General readers
BBC News(Free) — International news and in-depth reporting from the BBC — available in 40+ languages. Best for: International researchers · Journalists
The Guardian(Free) — Long-form investigative journalism with strong science, environment, and culture coverage. Best for: Writers · Journalists · Researchers
ProPublica(Free) — Independent investigative journalism with public data tools and document archives. Best for: Investigative journalists · Policy researchers
Ground News(Freemium) — News aggregator that shows media bias and coverage blindspots across 50,000+ outlets. Best for: Media researchers · Critical readers · Journalists
AllSides(Freemium) — Balanced news with left, center, and right perspectives on the same story side by side. Best for: Media literacy educators · Students · Journalists
Creative & Media
Europeana(Free) — 50M+ digitized items from European museums, libraries, and archives. Best for: European history researchers · Cultural studies
TED Talks(Free) — 4,000+ talks from leading thinkers on science, technology, design, and culture. Best for: Writers · Students · Curious generalists
YouTube(Free) — The world's largest video library — documentaries, lectures, interviews, and tutorials. Best for: Everyone · Researchers · Content creators
Spotify Podcasts(Freemium) — 5M+ podcasts covering every topic, including expert interviews and narrative journalism. Best for: Podcast researchers · Content creators · Writers
Substack(Freemium) — Expert newsletters and long-form writing on every topic — many free, some paid. Best for: Writers · Researchers · Founders
Vimeo(Freemium) — High-quality videos from filmmakers, artists, and educators — a quieter alternative to YouTube. Best for: Filmmakers · Artists · Creative researchers
Pocket Casts(Freemium) — Popular podcast client with a curated discovery section for expert audio content. Best for: Podcast researchers · Audio content consumers
Openverse(Free) — Search 800M+ Creative Commons-licensed images and audio for free, ethical use. Best for: Content creators · Designers · Writers
General
Google Scholar(Free) — The largest free index of academic papers, theses, books, and court opinions. Best for: Researchers · Students · Academics
Internet Archive(Free) — Digital library of millions of books, movies, music, websites, and historical documents. Best for: Writers · Historians · General researchers
Semantic Scholar(Free) — AI-powered academic search with 200M+ papers and citation graph analysis. Best for: Researchers · Scientists
Wikipedia(Free) — The world's largest encyclopedia — ideal for background context and finding primary sources. Best for: Everyone · Initial research · Context building
Connected Papers(Freemium) — Visual citation graph that maps related papers — explore a research field at a glance. Best for: Researchers building literature reviews
Open Library(Free) — Over 3 million books to borrow digitally through the Internet Archive's library system. Best for: Students · Researchers · Writers
Google Dataset Search(Free) — Google's dedicated search engine for datasets — indexes millions from repositories worldwide. Best for: Data scientists · Researchers · Analysts
Zenodo(Free) — Open repository from CERN for research data, software, reports, and presentations. Best for: Researchers · Data scientists
Substack(Freemium) — Expert newsletters and long-form writing on every topic — many free, some paid. Best for: Writers · Researchers · Founders
BASE(Free) — Bielefeld Academic Search Engine — indexes 450M+ documents from 10,000+ sources. Best for: Researchers · Students needing broad academic search
CORE(Free) — Aggregates 250M+ open-access research papers from repositories worldwide. Best for: Researchers · Open-access advocates
Directory of Open Access Journals(Free) — 18,000+ vetted open-access journals covering all disciplines — quality-controlled index. Best for: Researchers · Students seeking free full-text papers
OpenAlex(Free) — Fully open scholarly graph with 474M+ works, authors, institutions, and citation data. Best for: Bibliometric researchers · Research analysts
ResearchGate(Free) — Academic network where researchers share papers and connect with peers globally. Best for: Researchers · Graduate students
Academia.edu(Freemium) — Platform for sharing academic papers, with 50M+ documents uploaded by researchers. Best for: Researchers · Graduate students
Elicit(Freemium) — AI research assistant that finds and summarizes relevant academic papers automatically. Best for: Researchers · Graduate students · Scientists
Consensus(Freemium) — Ask research questions and get AI-synthesized answers sourced from peer-reviewed papers. Best for: Researchers · Healthcare professionals · Students
Perplexity(Freemium) — AI-powered search engine that cites sources — useful for rapid exploratory research. Best for: General researchers · Writers · Students
RefSeek(Free) — Academic search covering web pages, books, encyclopedias, and journals in one interface. Best for: Students · General researchers
Google Scholar Alerts(Free) — Email alerts for new papers matching your research keywords — stay current automatically. Best for: Researchers staying current in their field
Web of Science(Paid) — A trusted publisher-independent global citation database for academic and scientific research. Best for: Academics · Scientific researchers
Scopus(Paid) — Elsevier's massive abstract and citation database of peer-reviewed literature and scientific journals. Best for: Academics · Scientific researchers
Mendeley Data(Free) — A free and secure cloud-based repository where researchers can store and share their data. Best for: Researchers · Data scientists
Sci-Hub(Free) — A shadow library providing widespread free access to millions of paywalled academic papers. Best for: Researchers needing paywall bypass
Directory of Open Access Books(Open Access) — A community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books. Best for: Researchers · Students seeking open access books
Unpaywall(Free) — A database of millions of free scholarly articles, highly useful as a tool/platform recommendation. Best for: Researchers needing to find open access versions of paywalled papers
SciELO(Open Access) — A bibliographic database and digital library of open access journals, primarily focusing on Latin America. Best for: Researchers seeking Latin American scientific literature