Brands – S
- Sakae
- Salchow
- Santorella Publications
- Sartory
- SAS
- Savarez
- Savigny
- Saxmute
- Schaller
- Schaum Publications
- Schell Music
- Schirmer
- Schott
- Schuh Verlag
- Schwarz
- Scomegna
- Seagull
- Shadow
- Sharkfin
- Shergold
- Shubb
- Silbo
- Singular Sound
- SKY Music
- Slide-O-Mix
- Snark
- Softone
- Soho Sound Company
- Sonix
- Sontronics
- Sound Post, The
- Spirit Cases
- sshhmute
- StageGear
- Stahlhammer
- Stanley Tools
- Star
- Stentor Music Co.
- Steuer
- Strad Pad
- Stradpet
- Stretto
- Stubai
- Studio 49
- Suck UK
- Super Nikco
- Super Sensitive
- Superslick
- Suzuki
- Sweetone
- SwirlyGig
- SX Guitars
