SHAREit is described as 'Wireless file, app, video, and document transfer across platforms without internet, Bluetooth, or cables—up to 60x faster than Bluetooth for single or group sharing' and is a popular large file transfer service in the file sharing category. There are more than 100 alternatives to SHAREit for a variety of platforms, including Web-based, Android, Windows, Mac and Linux apps. The best SHAREit alternative is LocalSend, which is both free and Open Source. Other great apps like SHAREit are Send Anywhere, Send, Blip and Transfer.it.
Reezu works well for people who want to send large video files and let others watch them immediately. The recipient does not need an account and can stream the video before downloading it. The original file is always available with no compression.
