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Marketplace 100

A ranking of the largest and fastest-growing marketplace startups.
This ranking is based on the The a16z Marketplace 100 index^
that is using Second Measure^ as a data source.


  1. 20

    Course Hero

    Access 30 million course-specific study materials

    Education Online Education Studying Collaboration

    Headquarters: Redwood City, CA
    Released: 01 Oct 2006

      Course Hero Alternatives

    1. Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
    2. Brainscape - Find, create, and study SMART FLASHCARDS on any device. DOUBLE your learning speed using the most effective study system on the planet. Keep all your content in sync across Brainscape's website and your Android devices.
    3. Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.
    4. » All Course Hero alternatives

  2. 27

    Varsity Tutors

    Award-Winning Tutoring & Test Prep In 2,500+ Subjects

    Education Online Tutoring Online Learning Education & Reference

    Headquarters: St Louis, MO
    Released: 17 Oct 2007

      Varsity Tutors Alternatives

    1. TutorCruncher - Business management for tutoring companies
    2. TutorTrac - Classroom Management
    3. Teachworks - Teachworks helps growing tutoring & teaching companies efficiently manage students, teachers, scheduling, billing, payroll and more.
    4. » All Varsity Tutors alternatives

  3. 33

    Udemy

    Online Courses - Learn Anything, On Your Schedule

    Education Online Learning Online Courses Online Education

    Headquarters: San Francisco, CA
    Released: 11 May 2010

      Udemy Alternatives

    1. Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies
    2. Codecademy - Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.
    3. LinkedIn Learning - Online training through LinkedIn's professional network.
    4. » All Udemy alternatives

  4. 38

    Coursera

    Build skills with courses, certificates, and degrees online from world-class universities and companies

    Education Online Courses Online Learning Online Education

    Headquarters: Mountain View, CA
    Released: 01 Apr 2012

      Coursera Alternatives

    1. Udemy - Online Courses - Learn Anything, On Your Schedule
    2. edX - Best Courses. Top Institutions. Learn anytime, anywhere.
    3. Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
    4. » All Coursera alternatives

  5. 39

    Wyzant

    Learn on your terms from an expert tutor. Private, 1–on–1 lessons with the expert instructor of your choice.

    Education Online Education Online Learning Online Tutoring

    Headquarters: Chicago, IL
    Released: 21 Sep 2005

      Wyzant Alternatives

    1. Chegg - Save $$ on textbooks. Rent, buy or sell your books today and get 24/7 homework help when you need it with Chegg Study and Chegg Tutors.
    2. Varsity Tutors - Award-Winning Tutoring & Test Prep In 2,500+ Subjects
    3. TutorMe - Connect with a high-quality tutor in under 30 seconds
    4. » All Wyzant alternatives

  6. 43

    MasterClass

    MasterClass offers online classes created for students of all skill levels. Our instructors are the best in the world.

    Education Online Courses Online Learning Reading

    Headquarters: San Francisco, CA
    Released: 12 May 2015

      MasterClass Alternatives

    1. Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies
    2. SitePoint - Learn Web Design & Development with SitePoint tutorials, courses and books - HTML5, CSS3, JavaScript, PHP, mobile app development, Responsive Web Design
    3. Workshop - Learn new skills simply by doing them.
    4. » All MasterClass alternatives

  7. 54

    TakeLessons

    Private Lessons & Group Classes. We help students pursue their passion for learning. Search thousands of 5-star rated teachers with background checks and find the perfect teacher today!

    Education Online Learning Online Courses Online Tutoring

    Headquarters: San Diego, CA
    Released: 01 Jun 2006

      TakeLessons Alternatives

    1. Wyzant - Learn on your terms from an expert tutor. Private, 1–on–1 lessons with the expert instructor of your choice.
    2. Vectera - Vectera creates powerful video conference rooms for effective conversations.
    3. Italki - italki is a language learning social network that connects students and language teachers.
    4. » All TakeLessons alternatives

  8. 57

    SkillShare

    Skillshare is a learning platform with online classes taught by the world's best practitioners.

    Online Learning Online Courses Education Online Education

    Headquarters: New York, NY
    Released: 01 Dec 2010

      SkillShare Alternatives

    1. Udemy - Online Courses - Learn Anything, On Your Schedule
    2. Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies
    3. Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
    4. » All SkillShare alternatives

  9. 63

    Wonderschool

    Child Care Services & In-Home Preschool. Wonderschool pairs parents with in-home child care programs near them that fit the needs of their lifestyle and child's development.

    Childcare Software Parental Kids Education Education

    Headquarters: San Francisco, CA
    Released: 01 Jun 2016

      Wonderschool Alternatives

    1. Outschool - Take small-group classes, from anywhere. 8000+ video chat classes for K-12 science, art, mindfulness, english, social studies, life skills, and more!
    2. Birdhouse for Autism - Easily coordinate your child's care & discover insights
    3. Cubsta - Towards creating a paper-free childcare environment.
    4. » All Wonderschool alternatives

  10. 69

    Outschool

    Take small-group classes, from anywhere. 8000+ video chat classes for K-12 science, art, mindfulness, english, social studies, life skills, and more!

    Education Kids Education Online Learning Online Tutoring

    Headquarters: San Francisco, CA
    Released: 01 Jun 2015

      Outschool Alternatives

    1. Wonderschool - Child Care Services & In-Home Preschool. Wonderschool pairs parents with in-home child care programs near them that fit the needs of their lifestyle and child's development.
    2. Varsity Tutors - Award-Winning Tutoring & Test Prep In 2,500+ Subjects
    3. Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
    4. » All Outschool alternatives

  11. 90

    Verbling

    The Modern Way to Learn a Language. Language lessons with native 5-star teachers over video chat. Anytime, anywhere.

    Education Language Learning Online Learning Spaced Repetition

    Headquarters: San Francisco, CA
    Released: 01 Jun 2011

      Verbling Alternatives

    1. Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
    2. Italki - italki is a language learning social network that connects students and language teachers.
    3. Rosetta Stone - Rosetta Stone is the world's most popular software for learning languages. It is offered at a cost of just $169 when purchased outright, but it is also possible to purchase language programs in a subscription format that offers ongoing support.
    4. » All Verbling alternatives

Note: The "Marketplace 100" index here is following the a16z Marketplace 100 index. It is an extended version and not an affiliate of a16z.
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