| Sachimay Records: An experimental/improvised label promoting artists such as Matt Weston, Tatsuya Nakatani, and Khristian Weeks. |
| Sargasso: UK based label and shop site for the Sargasso label artists. |
| Segerhuva: Swedish label focuses on the most extreme end of the Scandinavian power electronics scene. |
| Selektion: An ars organization and record label that is home to RLW, Achim Wollscheid, Charly Steiger and others. |
| Shame File: Small artist-run label focuses on the most underground experimental music activity to be found in Australia. |
| Shimamoto Sound: A label that houses its own specially designed recording studio. Specializes in experimenting with traditional music styles to create innovative new sounds. Based in Massachusetts, USA. |
| Shimmy Disc: Label for experimental and independent bands. Founded by Kramer, producer of Urge Overkill and Low. |
| Shinkoyo: Oberlin, Ohio label releases unusual avant electronic music from artists such as Skeletons, Peter B., and Severiano Martinez. |
| Shitkatapult: A company based in Germany and Canada, focused on minimalist styles. Artists, dates, releases, profile, and contact. |
| Sijis Records: London based label specializes in music with limited appeal and offers all their releases at low prices. |
| Silvergirl Records: Releases Holiday Flyer, Gapeseed, and Track Star. Specializes in Indie-Rock and Experimental music. Includes artist profiles and reviews. |
| simballrec: Experimental music label releasing music by projects including Languis, Fer Chloca, Soulo, and Transistor Cricket. |
| Sinusoidal Records: An independent label based in Vancouver, Canada. With project sound samples, profiles, and links. |
| Skam Records UK: Home to Gescom, Boards of Canada, and Bola. With RealAudio clips and downloads. |
| Sloppy Abortion Records: A noise and experimental label based in Jacksonville, Florida. Artists include Whimsical Fetus, The Smocks, Fuzzy Bunnies, and Mafia Dumptruck. |
| Slum Communications and Darth Fuck Records: Non-profit labels conspiring to revise and expand the underground electronic music movement. |
| SmallVoices: Italian label dedicated to underground experimental music has released recordings of renowned Italian artists, largely on vinyl format. |
| Sniffle Records: Bringing the music, artists, and recordings from this label and Pamplemousse Studios to a wider audience. Artists include Jean-Michel Dupont, Sir Walter Raleigh's Folly, And the Bride wore Black, Chris Ancille, and DJ Slipnott & MC Ghetto. |
| Soleilmoon Recordings: Excellent site for dozens of ambient, experimental, and noise artists. Also an excellent store, for 30 underground labels. |
| Somnimage: Experimental music label based in Illinois releases titles covering a diverse range of styles. |
| Sonaria: Releasing avant-garde and experimental music. Artists include Christoph Heemann, Kranioklast, Organum, and Bladder Flask. |
| Sounds Are Active: Focuses on contemporary experimental hip-hop, free jazz and electronica. Artists include Bizzart, Create(!), and Xn. |
| Spectral House: Austin, TX, based label founded by Brent Fariss and Bill Thompson publishes contemporary experimental music for internet mail order distribution. |
| Spectre Records: Industrial, dark, doom, noise, and experimental record label. Small, but nice list of artists. |
| Squealer Music: Record label with an international roster of refuseniks and experimentalists including High Rise, Spatula, William Hooker, Tono-Bungay, the Last Days of May, Charles Curtis, the Gold Sparkle Band, the Tower Recordings and others. Focused on improv, out-rock and other experimental sounds. |
| Staalplaat: An organization that includes a record label, print publisher, radio show, shop, mail-order and distribution for ambient dance, dark experimental, plunderphonic, sound poetry and electronic avant-garde music. |
| Strange Fortune: Label releases the "ghost ambient" music of Tor Lundvall, and distributes Sol Invictus and other artists in the post-industrial and folk noir fields. |
| Sub Rosa: One of the first ambient and industrial music labels. They have re-released some of the defunct Rough Trade catalog. Located in Belgium. |
| Summersteps Records: With releases by artists such as Psychatrone Rhonedakk, Youth Aflame (The Choppers), Amasa, and Giraffe Hair. Also currently featuring "A Tribute to Jandek", with songs by Low, Amy Denio, Thurston Moore's Dapper, Gary Young, Monster Island, Retsin, and Bright Eyes. |
| Supple Records: New York based label specializes in ambient, experimental and space rock releases. |
| Swinging Axe: Label run by artist Randy Greif releases electronic, concrete and computer music. |
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