Syncplay is described as 'program allows you and your friend/partner/family member to watch same video file simultaniously on different PCs and different location by syncing playback of MPC-HC, mpv, mplayer2 and VLC players' and is an app in the Video & Movies category. There are more than 10 alternatives to Syncplay for a variety of platforms, including Online / Web-based, Windows, Mac, Google Chrome and Firefox. The best alternative is Metastream, which is both free and Open Source. Other great apps like Syncplay are Watch2Gether (Freemium), Kosmi (Free), Teleparty (Free) and Rave (Free).
Metastream allows you to watch internet videos with friends. It synchronizes media on websites so you can watch together. Watch or listen together: Start a session and invite your friends by sharing your friend code with them.
Watch2Gether lets groups of users watch videos in-sync together. At the same time users can communicate through a build-in chat-room and use web cam and audio chat. Available media sources are Youtube, Vimeo, Dailymotion and Soundcloud.
Kosmi is a free real time application and communication platform that offers voice, text and video calls along with games and applications such as SNES Party, NES Party, OpenArena, Poker, Virtual Cardtables, Synced YouTube and Cowatch Video.
Rave is a free iOS and Android application where you can watch Netflix, Disney+, YouTube, Prime Video and more with friends while chatting in perfect sync. Rave is also available on Chromebooks, Android TV, and is coming soon to Mac and Windows.
Web application that enables people to watch the same thing at the same time across the globe while interacting via video and text. Currently supports Netflix, Amazon, YouTube, Vimeo, Crunchyroll, etc.
Enjoy a movie night with your friends. Binge Together lets you create and join watchparties where you and friends can enjoy videos together from services including Netflix, Amazon Video, YouTube and Vimeo.