Semantic Scholar
The AI-native index that reads papers so you don't have to read all of them.
Tier 2 Open AccessFree
Research Database Directory
Every research database, reviewed.
EndNote
The veteran reference manager, deeply embedded in institutional workflows.
Tier 2 ToolsSubscription
Web of Science
Clarivate's publisher-neutral citation index — six decades of curated, cover-to-cover indexing built around the citation as the unit of discovery.
Tier 1 AcademicSubscription