BASE
One of the broadest open search engines for the academic web.
Open Access
OpenAlex
The fully open, CC0 index that set out to replace Scopus and Web of Science — bigger, free, and built for the Global South.
arXiv
The original preprint server — open science before the term existed.
bioRxiv / medRxiv
The preprint servers that moved the life and health sciences to publish-first.
Semantic Scholar
The AI-native index that reads papers so you don’t have to read all of them.
SciELO
Latin America’s open-access flagship — the network the big commercial indexes under-count.