Elicit

Yes, Elicit's 'Concept Discovery' feature is designed to address this. It uses semantic search to find papers that discuss the same concepts, even if they use different keywords or phrasing than your initial search terms. This is particularly helpful for exploring a research area where terminology may vary.

Currently, Elicit primarily supports exporting data in BIB and RIS formats for citation management. The extracted data tables are available as spreadsheets. While other export formats are not explicitly listed, you can likely convert the spreadsheet to other formats like CSV or Excel for further analysis or integration with other tools.

The free 'Basic' plan on Elicit provides 5,000 credits. While the exact number of papers you can analyze will depend on the complexity of the data extraction, this credit system allows you to explore the tool's capabilities. You can upgrade to a paid plan for increased credit limits as needed.

While Elicit excels at extracting structured data from empirical studies, it can still be helpful for literature reviews in fields like psychology or economics. The semantic search and concept discovery features can help you identify relevant papers, and you can adapt the data extraction tables to capture key findings from qualitative studies, though manual refinement may be required.