Reverb is a non-profit environmental organization that aims to educate and engage musicians and their fans to promote environmental sustainability. It was founded by environmentalist Lauren Sullivan and her musician husband, Guster guitarist/vocalist Adam Gardner.^[1]

The organization's services include carbon neutral concerts and venues, biodiesel for vehicles and generators, waste reduction, biodegradable catering products; recycling, green bus supplies and cleaners, energy efficiency, green contract rider, environmentally sustainable merchandise, green sponsorship, and educational outreach.^[2]

Reverb provides learning experiences designed to engage volunteers with local nonprofit groups. Customers can also donate money for environmental causes and receive a sticker.^[1]

The group has worked with artists including Drake, Jason Mraz,^[1] The Dead, Phish, Dave Matthews Band, John Mayer,^[2][3] Harry Styles,^[4] Guster, Barenaked Ladies, Maroon 5, and the Lilith Fair.^[5]