RiffTrax is a movie-riffing project similar to Cinematic Titanic. Unlike CT, many RiffTrax are of recent big-budget feature films, with listeners purchasing the audio track with the jokes and syncing it on their home entertainment system (thus eliminating the need to secure rights to the movies).
RiffTrax stars Mystery Science Theater 3000 alumni Michael J. Nelson, Kevin Murphy, and Bill Corbett. Mary Jo Pehl has recorded some RiffTrax as well (mostly shorts) alongside Bridget Jones.
Like Cinematic Titanic, Rifftrax has performed a number of live shows, many of which were later released on DVD. In 2016, Joel Hodgson, Frank Conniff and Trace Beaulieu joined Mary Jo Pehl at the RiffTrax/MST3K Live Reunion show (J. Elvis Weinstein was unable to attend, but he sent his well wishes via Twitter).