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| 303Net | http://303net.com/ | artist network | |
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| 43 Things | http://43things.com/ | project management | |
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| 7 Digital IndieStore | http://indiestore.com/ | sales and distribution | |
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| 9Vibe | http://9vibe.com/ | music promotion | |
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| A&R Online | http://aandronline.com/ | directory | |
| A2B | http://a2b.cc/ | regional directory | |
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| Accuradio | http://accuradio.com/ | streaming audio | |
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| ACIDplanet | http://acidplanet.com/ | band profiles | |
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| Afternight | http://afternight.com/ | directory | |
| Aggrega | http://aggrega.com/ | video sharing | |
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| AIMP | http://aimp.org/ | artist network | |
| AKMusic | http://akmusicvideo.com/ | video sharing | |
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| AlbumArt.org | http://albumart.org/ | music search engine | |
| Alert Thingy | http://alertthingy.com/ | media mashup | |
| All Consuming | http://allconsuming.net/ | social networking | |
| All Crazy Style | http://allcrazystyle.com/ | media mashup | |
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| All Synthpop | http://allsynthpop.com/ | directory | |
| All The Lyrics | http://allthelyrics.com/ | music search engine | |
| Allmusic | http://allmusic.com/ | media site | |
| Amazing CDs | http://amazingcds.com/ | consignment sales | |
| Amazon Advantage | http://advantage.amazon.com/ | sales and distribution | |
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| Amie Street | http://amiestreet.com/ | sales and distribution | |
| AmigoFish | http://amigofish.com/ | podcasting | |
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| Analogik | http://analogik.com/ | band profiles | |
| Andromeda | http://turnstyle.com/andromeda/ | website software | |
| Animoto | http://animoto.com/ | video sharing | |
| Anywhere.FM | http://anywhere.fm/ | streaming audio | |
| AOL Music | http://music.aol.com/ | media site | |
| Ariel Publicity | http://arielpublicity.com/ | music promotion | |
| Arkade | http://arkade.com/ | sales and distribution | |
| Artist Data Systems | http://artistdata.com/ | website software | |
| Artist Direct | http://artistdirect.com/ | media site | |
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| Artist Launch | http://artistlaunch.com/ | sales and distribution | |
| Artist Log | http://artistlog.com/ | video sharing | |
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| Artist Server | http://artistserver.com/ | band profiles | |
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| Artistopia | http://artistopia.com/ | band profiles | |
| ArtistShare | http://artistshare.com | band profiles | |
| ASCAP | http://ascap.com/ | music registration | |
| AtomFilms | http://atomfilms.com/ | video sharing | |
| Audio Lunchbox | http://audiolunchbox.com/ | sales and distribution | |
| Audio Mostly | http://audiomostly.com/ | audio conferences | |
| Audiobaba | http://audiobaba.com/ | music search engine | |
| Audiofarm | http://audiofarm.org/ | music sharing | |
| AudioMastermind | http://audiomastermind.com/ | directory | |
| AudioPyro | http://audiopyro.com/ | sales and distribution | |
| AudioStreet | http://audiostreet.net/ | sales and distribution | |
| AudioWorld | http://audioworld.com/ | directory | |
| AudioZue | http://audiozue.com/ | media mashup | |
| Awesome Highlighter | http://awesomehighlighter.com/ | website software | |
| Babulous | http://babulous.com/ | band profiles | |
| BackPack | http://backpackit.com/ | project management | |
| Backstage Commerce | http://backstagecommerce.com/ | sales and distribution | |
| Badoo | http://badoo.com/ | band profiles | |
| Bahu | http://bahu.com/ | band profiles | |
| Band Archive | http://bandarchive.com/ | directory | |
| Band Family Tree | http://bandfamilytree.com/ | band profiles | |
| Band Universe | http://banduniverse.com/ | band profiles | |
| Band Village | http://bandvillage.com/ | sales and distribution | |
| Band Weblogs | http://bandweblogs.com/ | press releases | |
| Band-Biz | http://band-biz.com/ | artist network | |
| BandAmp | http://bandamp.com/ | band profiles | |
| BandBuzz | http://bandbuzz.com/ | band profiles | |
| BandFreaks | http://bandfreaks.com/ | directory | |
| Bandlink | http://bandlink.net/ | band profiles | |
| Bandlist EU | http://bandlist.eu/ | band profiles | |
| BandMix | http://bandmix.com/ | band profiles | |
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| Bandname | http://bandname.com/ | music registration | |
| BandRadio | http://bandradio.com/ | directory | |
| Bands in Town | http://bandsintown.com/ | social networking | |
| Bands That Sound Like | http://soundslikenow.org/ | media mashup | |
| Bandspace | http://bandspace.com/ | band profiles | |
| Bandzoogle | http://bandzoogle.com/ | band profiles | |
| BareBonz | http://barebonz.org/ | directory | |
| Basecamp | http://basecamphq.com/ | project management | |
| Bathtub Music | http://bathtubmusic.com/ | sales and distribution | |
| Battle of Songs | http://battleofsongs.com/ | music contests | |
| BeatPick | http://beatpick.com/ | sales and distribution | |
| Beatport | http://beatport.com/ | sales and distribution | |
| Bebo | http://bebo.com/ | social networking | |
| Bebop | http://bebopular.com/ | media mashup | |
| Bee There | http://beethere.net/ | concert guide | |
| Believe Digital | http://believedigital.com/ | sales and distribution | |
| BeSonic | http://besonic.com/ | band profiles | |
| Best of the Web | http://botw.org/ | directory | |
| Beta | http://betarecords.com/ | band profiles | |
| BiggerBoat | http://biggerboat.com/ | advertising | |
| Biip | http://biip.no/ | band profiles | |
| BiteNova | http://bitenova.nl/ | music sharing | |
| Bitmunk | http://bitmunk.com/ | sales and distribution | |
| BitTorrent | http://bittorrent.com/ | music sharing | |
| Bix | http://bix.com | music contests | |
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| Black Planet | http://blackplanet.com/ | band profiles | |
| Blast My Music | http://blastmymusic.com/ | sales and distribution | |
| Bleep | http://bleep.com/ | sales and distribution | |
| Blinklist | http://blinklist.com/ | social bookmarking | |
| Blip.tv | http://blip.tv | video sharing | |
| Block Posters | http://blockposters.com/ | art and design | |
| Blogger | http://blogger.com | website software | |
| Bloglines | http://bloglines.com/ | social bookmarking | |
| BlogMarks | http://blogmarks.net/ | social bookmarking | |