Their fourth album Vheissu (2005) made significant changes by incorporating electronic beats, keyboards, and a more experimental sound.

[3] Teppei recruited his skate park friend Eddie Breckenridge to play bass, who then brought his brother Riley on as a drummer.

[4] In 1999, the band self-released an EP, First Impressions, which was the product of a two-day session at A-Room Studios with Brian Tochilin.

[12] The band again donated a portion of the album's proceeds, this time choosing a non-profit youth shelter in South Central Los Angeles, A Place Called Home.

[14][11][15] The band eventually signed with Island Records, who had agreed to match Thrice's charitable donations in the same manner that Hopeless/Sub City had.

[20] The album's title is in reference to Burn Collector by Al Burian and is meant to reflect the band's desire to do more than make music and contribute to society through their charitable donations.

[2][23] A portion of the album's proceeds were this time donated to the Syrentha Savio Endowment, a financial aid organization for breast cancer patients.

"[25] "All That's Left" received significant airplay, and Thrice found themselves playing at larger venues as the year progressed.

[33][34] Island Records issued a promotional disc (that features an alternate version of "The Artist in the Ambulance") in early 2004 that would become the basis for If We Could Only See Us Now, a CD/DVD package outlining the group's career.

[35] Named after a lyric from "So Strange I Remember You," the CD portion contained live tracks from a performance at the Apple Store and various B-sides.

[42] For the band's donations related to this album's sales proceeds, Thrice chose novelist Dave Eggers's charity 826 Valencia, a tutorial program for underprivileged children, which promotes literacy and aids teens in developing creative writing skills.

[58][57] Thrice toured with Circa Survive and Pelican in spring 2008 to support The Alchemy Index, which had now been released in full.

Bonus content included two b-sides from the Beggars sessions, two remixes, and a studio rendition of their cover of The Beatles' "Helter Skelter".

"[66] Thrice's members also hoped to save money and spend more time with their families by building a recording studio in guitarist Teppei Teranishi's home.

[76] In 2009, while on the Vans Warped Tour in Houston, Texas, the band autographed a Gibson Guitar for the non-profit Music Saves Lives and assisted in their goal of raising the nation's blood supply.

"[78] Thrice's spring (2010) tour with Manchester Orchestra was cut short on April 23 when Kensrue had to leave because of an illness in the family.

"[84] Thrice, accompanied by Animals as Leaders and O'Brother, began their farewell tour on May 4, 2012, in San Diego and ended it with a 33-song solo show on June 19, 2012, in Santa Ana.

[85] Thrice's second live album, Anthology, was released on October 30, 2012, on two CDs and as a quadruple 180 gram LP box set limited to 3000 copies, and features 24 songs recorded at select shows along the tour.

[94] Eddie Breckenridge joined the alternative rock band Angels & Airwaves in June 2014, which also features current/former members of Blink-182, Nine Inch Nails and Hazen Street.

[100][101] Two months later, Thrice began announcing their inclusion in several 2015 music festivals, including New Jersey's Skate and Surf Fest in May;[102] Montebello, Quebec's Amnesia Rockfest in June;[103] Folkestone, UK's Hevy Music Festival in August;[104] and three sites for Riot Fest, Denver in August as well as Chicago and Toronto in September.

[107][108] In April 2016, Thrice released the lead single from To Be Everywhere Is to Be Nowhere, "Black Honey", and announced several summer tour dates throughout the US and Europe.

Talking about 'Only Us' Breckenridge stated: "It’s a song about inclusion and compassion and togetherness — realizing that we’re all connected and should be able to rally around that to make the world a better place.".

[134] In honor of the 20th anniversary of The Artist in the Ambulance, the band released a rerecorded version of the album on February 1, 2023, with new instrumentation and vocals, as well as guest spots from Andy Hull of Manchester Orchestra, Sam Carter of Architects, Ryan Osterman of Holy Fawn, Chuck Ragan of Hot Water Music, Mike Minnick of Curl Up and Die and Brian McTernan, who had produced the original album.

[144][145][146] Lastly, on March 18, 2016, Kensrue released an album of live covers of popular songs, Thoughts That Float on a Different Blood.

[149] Dustin Kensrue provided guest vocals and Teppei Teranishi played guitar/provided production on The Out Circuit's album Pierce The Empire With a Sound.

[167] Thrice's first two albums, Identity Crisis and The Illusion of Safety have been described as metal and punk influenced post-hardcore.

[160] On their fourth album, Vheissu, the band incorporated electronic beats, keyboards, and more experimental and nuanced songwriting.

[168] When describing their ninth studio album, To Be Everywhere Is to Be Nowhere, Riley Breckenridge said, "I think there is a different sound but I also think that there is a healthy nod to some of our back catalog in a lot of the music.

As far as the approach, it's probably most similar to Vheissu in that we were trying to pull from a very wide variety of influences"[126] Guitar World called Thrice the "Radiohead of post-hardcore".

[151] Thrice have cited numerous bands as influences, including Fugazi, Refused,[176] Poison the Well,[177] Miles Davis, Isis, Hot Snakes, No Knife, Pixies, Thelonious Monk,[178] and Radiohead.