The best free alternative to Google Scholar is Semantic Scholar. If that doesn't suit you, our users have ranked more than 25 alternatives to Google Scholar and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Google Scholar are WorldCat, ResearchGate, Scinapse and Connected Papers.
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.
WorldCat is the world's largest network of library content and services. WorldCat libraries are dedicated to providing access to their resources on the Web, where most people start their search for information.
Enables users to upload and share scientific papers, connect with researchers globally, discover and follow research topics, access datasets, send direct messages, participate in discussions, track citation metrics, and explore academic job opportunities.
Scinapse is a free search engine for academic papers. As of September 2018, it indexes more than 200 million articles from more than 40,000 journals.
Compared to other similar website, scinapase seems like, close alternative to google scholar. If they introduce scholar profile section which is under beta will make it more appealing.
Connected Papers is a unique, visual tool to help researchers and applied scientists find and explore papers relevant to their field of work.
gives a brief view of papers associated with searched paper
Search engine for tens of millions of preserved research papers. This fulltext search index includes over 25 million research articles and other scholarly documents preserved in the Internet Archive.
BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 300 million documents from more than 10,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access).
Thomson Reuters Web of KnowledgeSM is a research platform that gives you access to objective content and powerful tools to search, track, measure and collaborate in the sciences, social sciences, arts, and humanities.
ArnetMiner (AMiner) is designed to search and perform data mining operations against academic publications on the Internet, using social network analysis to identify connections between researchers, conferences, and publications.
Elicit is an AI-powered research assistant designed to help users efficiently discover, organize, and analyze academic papers and insights.
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.
OA.mg is a search engine for academic papers. Whether you are looking for a specific paper, or for research from a field, or all of an author’s works – OA.mg is the place to find it.
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SemanticScholar has a large corpus of works.