USA-based trusted database that provides a curated whitelist and blacklist of academic journals. It helps researchers identify credible journals and avoid predatory publications. Widely used by universities and institutions for research validation. Ensures transparency in journal quality and publishing standards.

A global open-access platform for sharing early-stage research in social sciences, humanities, and more. Researchers can publish working papers and get feedback before formal publication. It increases visibility and collaboration among scholars worldwide. Owned by Elsevier and widely trusted in academia.

A comprehensive database that provides detailed information about journals, magazines, and serial publications. It helps users verify whether a journal is active, peer-reviewed, and indexed. Commonly used by librarians, researchers, and publishers. Covers thousands of publications across multiple disciplines globally.

A free academic search engine that allows users to find scholarly articles, theses, books, and conference papers. It indexes content from various publishers, universities, and websites. Provides citation counts, author profiles, and related research suggestions. One of the most widely used tools for academic research worldwide.

A nonprofit organization that provides DOI registration and metadata services for scholarly content. It helps researchers find, link, and cite academic works by connecting publications across publishers. Crossref stores metadata such as titles, authors, and references, enabling reliable access to research (it does not host full-text articles). Widely used worldwide to support open and connected scholarly communication.