After Forever was originally assembled in 1995 under the name Apocalypse, playing death metal, with harsh male vocals. With the joining of vocalist Floor Jansen in 1997, their style and sound shifted towards symphonic metal, in order to give emphasis to her soprano voice, in contrast with the grunts and screams provided by Gommans and Mark Jansen. Their line-up at this point comprised Floor Jansen, Mark Jansen, Sander Gommans, Luuk van Gerven, Jack Driessen and Joep Beckers.
In 1999 the band began composing their own songs and recorded two demos entitled Ephemeral and Wings Of Illusion, which drew the attention of the Dutch Transmission Records label, with whom the band signed a contract.
Their debut album Prison of Desire was recorded in 2000, featuring the guest appearance of Sharon Den Adel of the Dutch band Within Temptation on the song "Beyond Me". The album obtained very good reviews in Europe. By the end of the year, drummer André Borgman and keyboardist Lando van Gils joined the band, replacing Joep Beckers and Jack Driessen.
During the year 2000, Floor Jansen was invited to guest sing in Ayreon's Universal Migrator Part 1: The Dream Sequencer album. Ayreon is the most successful of the many projects by Dutch guitarist Arjen Anthony Lucassen and this album is only the first of many other collaborations with Floor Jansen.
In 2001, the band released the album Decipher, that featured for the first time live classical instruments and a live choir. The complex arrangements of the new compositions pushed After Forever's music even more towards the symphonic metal genre.
In 2002 Mark Jansen, one of the main composers of the band, was fired from After Forever and subsequently assembled the band Epica, where he continued to pursue the combination of symphonic metal with death metal elements, already present in the first two albums by After Forever. He was replaced by Bas Maas, who had been a roadie for the band for years. In 2003, the new line-up of After Forever released the EP and DVD Exordium.
In 2004, the concept album Invisible Circles was released. The album, that deals with childhood traumas and abuse, introduced progressive metal elements to the music of After Forever and the use of a clean male voice. The album reached 24th place in the Dutch Top 100 musical chart. In the same year, Lando van Gils also left the band and was replaced by Joost van den Broek, a keyboard player that Floor Jansen had met during her tour with Star One .
In early September 2005, the band released their fourth album Remagine. The album was produced using pre-recorded drum tracks by André Borgman, who had to take a long leave of absence to cure his illness. The songs of the album are simpler and more straightforward than in the previous albums, preserving anyway the usual dual voice dynamic in the sound of the band.
On March 3, 2006, the band left the Transmission Records label, due to the scarce promotion, that the label was providing to their albums. Following this departure, Transmission Records released the Mea Culpa compilation, with plenty of rarities and B-sides. By October of the same year, After Forever had signed to Nuclear Blast Records.
In the end of 2006 the band recorded their final and only album on the Nuclear Blast label, self-titled After Forever. It features guest appearances from Annihilator guitarist Jeff Waters and Doro Pesch. Videos of the recording sessions were available for download on the band's website. The album was released on April 23, 2007.
In January 2008, After Forever announced on their website, that the band would be taking a break of at least a year, mainly to assess the health problems of vocalist and guitarist Sander Gommans, who had been absent during most of the tour supporting the album After Forever. In an interview with Ragnarök radio, Floor said the band would get together early 2009 to discuss After Forever's future.
On February 5, 2009, After Forever announced, that they decided to call it quits.
The long break, during 2008 and 2009, had made them realize, that they did not feel the passion towards the band any longer.
After the split up of the band, Sander Gommans published in 2009 the album System Overload with his solo project HDK and continues working as a high school art teacher. Floor Jansen started a new band called ReVamp and signed in 2010 a contract with Nuclear Blast for their first eponymous album, then from late 2012 to summer 2013 toured with Nightwish and later became the permanent lead singer of the band.
Joost van den Broek collaborated with both Gommans and Jansen on their new musical projects and with Stream of Passion's second album The Flame Within. Guitarist Bas Maas joined the live band supporting German hard rock singer Doro Pesch in 2008.