Course Hero

QuillBot, Inc. is a company that specializes in developing an AI writing collaborator designed to enhance and refine written content. Founded in 2017 and headquartered in Chicago, Illinois, with an additional office in Jaipur, India, QuillBot employs advanced artificial intelligence and natural language understanding (NLU) to automatically rewrite full paragraphs and improve clarity by fine-tuning language and introducing varied vocabulary. The platform is widely used, with over a million users globally, who rely on its sophisticated paraphrasing technology to create compelling messages while maintaining the original meaning of their content. QuillBot offers integrations and add-ins that allow users to incorporate its solutions seamlessly into their writing workflows.

LitCharts is a literary resource, with lots of literature guides, literary terms, and modern English translations of every Shakespeare play. It offers a database of diverse literature guides. It was launched by Justin Kestler in September 2013.

Symbolab is a math education tool founded in 2011 and based in Tel Aviv, Israel. It operates as a semantic web search engine specifically for mathematics and science, allowing users to search for equations, formulas, and expressions through mathematical symbols and scientific notations, as well as text. The platform indexes content from various sources, including online encyclopedias, academic publications, and textbooks in mathematics, physics, and chemistry. Symbolab offers automated step-by-step solutions for a range of topics, including algebra, trigonometry, and calculus, catering to students from middle school through college. Additionally, it features a variety of smart calculators that assist users in solving equations, inequalities, integrals, derivatives, limits, and more, thereby enhancing the learning experience and making scientific content more accessible. As of October 2020, Symbolab functions as a subsidiary of Course Hero, Inc.