Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and then share the results of your research. Developed by George Mason University
License: Open Source
Mendeley is known for its user-friendly interface and strong PDF management capabilities, making it ideal for individual researchers. In contrast, Zotero is open-source with powerful web scraping and collaboration features, making it a better choice for group projects and users needing extensive citation flexibility.