Iris.ai is a tool that excels in interdisciplinary challenges as it builds an overview of the research landscape and makes connections between different papers. Iris.ai comes with access to:

• >100 million open access papers via core.ac.uk,
• Open Access and Paywalled papers from PubMed,
• USPTO patents via PatentsView
• CORD-19, the Allen Institute hosted COVID-19 dataset

CORE is the most comprehensive aggregator harvesting from institutional, subject and preprint repositories as well as gold and hybrid open access journals. The data is collected from thousands of data providers around the world. You can see the full list of Open Access data providers here.