CiteSeerX is described as 'CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science' and is an website in the Education & Reference category. There are seven alternatives to CiteSeerX, not only websites but also apps for iPhone. The best alternative is Google Scholar, which is free. Other great sites and apps similar to CiteSeerX are ResearchGate (Free), Scinapse (Free), SemanticScholar (Free) and Scopus (Paid).
ResearchGate was built by scientists, for scientists. It started when two researchers discovered first-hand that collaborating with a friend or colleague on the other side of the world was no easy task.
Semantic Scholar (paywall free) is a science publication aggregator that collects citation-data from PubMed, CiteSeer, IEEE etc and rank each article according to the percieved number of impactful citations.
Elsevier’s Scopus, the largest abstract and citation database of peer-reviewed literature. Search and access research from the science, technology, medicine, social sciences and arts and humanities fields.
The Lens serves almost all the patents and scholarly work in the world as a free, open and secure digital public good, with user privacy a paramount focus. Discover, analyse, and map global innovation knowledge.