Babbel - Babbel is a paid language learning service that aims to strike a balance between thoroughness and cost efficiency.

Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.

Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.

PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.

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.

Clever - syncing between education applications for K-12 schools