LENS is described as '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' and is an website in the Education & Reference category. There are nine alternatives to LENS, not only websites but also apps for Android, iPhone, Android Tablet and iPad. The best alternative is Google Scholar, which is free. Other great sites and apps similar to LENS are Microsoft Academic Search (Free), Scinapse (Free), SemanticScholar (Free) and Sparrho (Free).
Microsoft Academic Search is an experimental research service developed by Microsoft Research to explore how scholars, scientists, students, and practitioners find academic content, researchers, institutions, and activities.
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.
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.
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.