Learning & Education·Standings

Research Paper Discovery Tools — page 2

• 33 platforms
• 8 with a free tier
• Checked 24 Oct 2026
• Showing 26–33

1. #PlatformSignalPlugs inPrice
2. 26
   GS

   Google Scholarscholar.google.com

   Free web-based research discovery tool, founded in 2004.

   4.8 APIOpenFree Free tier
   →
3. 27
   S

   ScienceOpenscienceopen.com

   Free web service for exploring scientific research.

   4.8 APIOpenFree Free tier
   →
4. 28
   C

   Cerebrumaskcerebrum.org

   Free web-based research discovery tool.

   4.8 APIOpenFree Free tier
   →
5. 29
   C

   CiteSeerXciteseerx.ist.psu.edu

   Free web-based research discovery tool.

   4.8 APIOpenFree Free tier
   →
6. 30
   CM

   Crossref Metadata Searchsearch.crossref.org

   Free web search for Crossref metadata.

   4.8 APIOpenFree Free tier
   →
7. 31
   OE

   OpenAIRE Exploreexplore.openaire.eu

   Free web tool for exploring open research outputs.

   4.8 APIOpenFree Free tier
   →
8. 32
   OR

   Open Research Knowledge Graphorkg.org

   Free web platform for exploring research knowledge.

   4.8 APIOpenFree Free tier
   →
9. 33
   CP

   Connected PapersConnected Papers

   Free research discovery tool.

   4.6 APIOpenFree Free tier
   →

Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure