Chegg is an American education technology company founded in 2005 by Aayush Phumbhra, Osman Rashid, and Josh Carlson. The website was released in 2007 and initially focused on textbook rentals, but has since expanded its services to include online tutoring, homework help, and other student support tools.

Chegg has become famous in the United States for its convenient and affordable services, which provide students with access to a wide range of academic resources and tools. The website has over 3 million subscribers and receives more than 40 million monthly visitors, making it one of the most popular educational websites in the country. Chegg's headquarters are located in Santa Clara, California.

Founded: 2005
Developed by: Aayush Phumbhra, Osman Rashid, and Josh Carlson
Headquarters: Santa Clara, California
Official website: https://www.chegg.com/

Course Hero is an American education technology company that was founded in 2006 by Andrew Grauer. The website was released in 2008 and has since become one of the most popular educational websites in the United States. Course Hero offers a wide range of resources and tools for students, including study guides, practice exams, and homework help.

The website has gained popularity in the US due to its comprehensive resources and user-friendly interface, which allows students to easily find the information they need to succeed in their courses. Course Hero has over 20 million registered users and receives more than 10 million monthly visitors, making it one of the most visited education websites in the US. The company is headquartered in Redwood City, California.

Founded: 2006
Developed by: Andrew Grauer
Headquarters: Redwood City, California
Official website: https://www.coursehero.com/

Slader is an American educational technology company that was founded in 2010 by Kyle Gerrity and Scott Kolb. The website was released in the same year and has since become a popular resource for students seeking homework help and textbook solutions. Slader allows students to ask and answer questions related to their coursework, and provides step-by-step solutions to textbook problems.

The website has gained popularity in the United States due to its user-generated content, which provides students with access to a wide range of perspectives and solutions. Slader receives over 1 million monthly visitors and has a strong presence in the US education market. The company is headquartered in New York City.

Founded: 2010
Developed by: Kyle Gerrity and Scott Kolb
Headquarters: New York City
Official website: https://www.slader.com/

Khan Academy is a non-profit educational organization that was founded in 2008 by educator Salman Khan. The website was released in the same year and has since become one of the most popular online learning resources in the United States. Khan Academy offers free online courses and video tutorials on a wide range of subjects, including math, science, computer programming, economics, and more.

The website has gained popularity in the US due to its comprehensive resources and its mission to provide free, high-quality education to anyone, anywhere. Khan Academy receives over 18 million monthly visitors and has been recognized for its impact on education, including being named a Top 10 Innovative Company in Education by Fast Company in 2012. The organization is headquartered in Mountain View, California.

Founded: 2008
Developed by: Salman Khan
Headquarters: Mountain View, California
Official website: https://www.khanacademy.org/

StudyBlue is an American educational technology company that was founded in 2009 by Chris Klundt and Dave Sargeant. The website was released in the same year and has since become a popular resource for students seeking study materials and learning tools. StudyBlue allows students to create and share digital flashcards, study guides, and practice quizzes, and provides access to a library of user-generated content.

The website has gained popularity in the United States due to its user-friendly interface and its emphasis on collaboration and community-building among students. StudyBlue receives over 10 million monthly visitors and has a strong presence in the US education market. The company is headquartered in San Francisco, California.

Founded: 2009
Developed by: Chris Klundt and Dave Sargeant
Headquarters: San Francisco, California
Official website: https://www.studyblue.com/