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.
Cost / License
- Free
- Proprietary
Platforms
- Online



Google Scholar is described as 'Freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes most peer-reviewed online journals of Europe and' and is a popular academic research tool in the education & reference category. There are more than 25 alternatives to Google Scholar, not only websites but also apps for a variety of platforms, including iPhone, iPad, Windows and Linux apps. The best Google Scholar alternative is Semantic Scholar, which is free. Other great sites and apps similar to Google Scholar are WorldCat, ResearchGate, Scopus and Scinapse.
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.




RefSeek is a web search engine for students and researchers that aims to make academic information easily accessible to everyone. RefSeek searches more than five billion documents, including web pages, books, encyclopedias, journals, and newspapers.
Find Academic Papers: Building on the SemanticScholar corpus and OpenAI embeddings, AcademiaOS finds and ranks relevant papers to your search queries.

CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science.
This project is a web interface that attempts to tame the overwhelming flood of papers on Arxiv. It allows researchers to keep track of recent papers, search for papers, sort papers by similarity to any paper, see recent popular papers, to add papers to a personal library, and...

Publish or Perish (PoP) uses Scopus, Crossref, Google Scholar, Microsoft Academic, and Web of Science queries to obtain citation information, which is then analysed and converted to a variety of metrics (see Appendix).




Biohunter is a single portal which provides literature search, data statistics, reading, sorting, storing, journal suggestion for publication, field expert identification and their contact details for collaboration. www.biohunter.in.




BioSeek Mobile - Next Generation Search For Life Sciences. Fast. Efficient. Free. We process at one go multi-component searches that are normally quite time consuming. We strive to deliver the clearest representations of massive amounts of data.




HathiTrust Digital Library is a large-scale collaborative repository of digital content from research libraries including content digitized via Google Books and the Internet Archive digitization initiatives, as well as content digitized...
Snowball lets you quickly find and filter through papers using the snowballing method. Start with a core collection of papers, and find more by going through their citations and references.
