On Apr 20, 2013, Grouplove released a "Make It To Me" in collaboration with Manchester Orchestra. They announced their second album, as well as debuting the video for the lead single, "Ways To Go", on 10 June 2013.
On September 17, 2013, Grouplove's second album, Spreading Rumours, was released. That same day, Grouplove played a sold out show at the Troubadour in West Hollywood with supporting Australian band, The Rubens. The band then embarked on an 18-show US tour, the Seesaw Tour, on which they played in 9 cities, with two dates in each city – one a more standard show, the other a more stripped back show. They were supported on this tour by The Rubens.
In late 2013, Grouplove started touring with Daniel Gleason. This was temporary and was to allow Sean Gadd to do other work. Although rumors circulated that he left the band, he stated on Twitter that he was still part of Grouplove. Gleason then toured with the band on their 2014 US tour, on which they were supported by MS MR, and their subsequent European tour, on which they were supported by FEMME for the UK dates.
On April 22, 2014, Sean Gadd tweeted, "Thanks for all the love. Grouplove is family and still my favorite band. Sending love. GROUP", leaving his status with the band up in the air. He has posted a song on YouTube called "Dream With Me". On June 19, 2014, Sean Gadd tweeted a series of tweets about his status in the band, the last one officially confirmed his leaving of the band, "I'm so sorry I made a big mistake. I'm making an announcement of why I'm leaving grouplove forever x." This was followed by a post on the band's website officially announcing his departure.
The band played at several festivals in 2014, including Bonnaroo, Lollapalooza, Firefly and Coachella, and will headline the Honda Civic tour in late August/early September, supported by Portugal. The Man. While on tour that year, they performed a cover of Beyonce's hit single, "Drunk In Love".
In 2014, Grouplove released I'm With You, a short form tour documentary about the band. The documentary featured performances from the New York Seesaw Tour shows and a digital album of six songs is set for release by Atlantic.
The band have contributed original songs "Let Me In", to the soundtrack for the movie The Fault In Our Stars. They also contributed an original song, "Everyone's Gonna Get High", to an episode of the second season of the HBO series Girls; and another song, "Underground", to the 2012 Tim Burton movie Frankenweenie. In 2014, they provided the end title song for the Netflix original series BoJack Horseman and the song No Drama Queen for Paper Towns.
Grouplove released their third studio album, Big Mess, on September 9, 2016. On July 15, 2016, the band released the lead single from the album, "Welcome to Your Life". The band also announced a world tour which began in August 2016.