Only Litmaps9
- 270+ million research articles
- data from Crossref, Semantic Scholar, and OpenAlex
- provider coverage includes PubMed, arXiv, bioRxiv, medRxiv, Web of Science, Scopus, and Microsoft Academic Graph
- open-access metadata indexing
- weekly database updates
- duplicate/version handling
- citation and semantic search options
- Zotero/reference-manager sync
- map annotation/share/monitor alerts