The EdTech revolution started in the 1920s. With the introduction of the radio came on-air classes disseminated to students within broadcast range. The overhead projector appeared in the classroom in 1930. The handheld calculator made its school debut in 1972. Oh, how the times have changed. Now, it's tablets and the development of 1:1 device programs. The sector is anticipated to reach a value of $549B by 2033. Using the alternative data that Similarweb Stock Intelligence is built on, we've tracked and analyzed the online assets of the top EdTech companies.