Moretti was part of a project, Megapuss, with Devendra Banhart, Gregory Rogove and Noah Georgeson in 2008. The group released one self-titled album. The following year, Moretti and Banhart collaborated on a project called Permanent Adventure. Moretti played drums for Neon Neon, on their track "Dream Cars", from 2008's "Stainless Style". Moretti also played on Kesha's 2012 song "Only Wanna Dance With You", together with bandmate Julian Casablancas. He co-wrote "Prisoner," from Har Mar Superstar's 2013 album "Bye Bye 17", with Banhart and Amarante. Moretti and Amarante also were part of Banhart's backing band during his 2013 tour which had dates in the US and Europe. Moretti also contributed to Amarante's debut solo album in 2014. In 2015, Moretti remixed Spoon's 2014 track "Inside Out" for the band's remix EP. In 2016, Moretti contributed an Eagles of Death Metal cover for the Play it Forward campaign, supporting aid for the victims of the 2015 Paris attacks; with Beck and Nick Valensi, he covered "I Love You All the Time." Moretti sat-in as drummer for The 8G Band, the house band for Late Night with Seth Meyers, during the second week of April 2016. Moretti played drums on the 2017 track "Indignities” by New York synth-pop band Nation Of Language; he also filled in as bassist on one of the band's tours. In 2018, Moretti contributed the original instrumental song "In Case of Separation" to French conceptual artist Sophie Calle's "tribute" album, "Souris Calle".