Please note that this is a company listing not a brand listing, for the latter see: Brands & trademarks

Grand pianos
Australis Music — Beijing Xinghai Piano Group Limited — Burgett Inc. — Gibson Guitar Corp. — Guangzhou Pearl River Piano Group Co. — Joseph Brodmann Piano — Julius Blüthner Pianofortefabrik GmbH — Kawai — L. Bösendorfer Klavierfabrik — Petrof — Shanghai Chaobo Musical Instruments Co. — Seiler — Sejung Musical Instruments Co. — Steinway & Sons — Wilhelm Schimmel Pianofortefabrik — Young Chang.

Companies that have made grand pianos in the past
Johann Friedrich Luther — Tokai.

Upright pianos
Australis Music — Beijing Xinghai Piano Group Limited — Enrique Keller — Gibson Guitar Corp. — Guangzhou Pearl River Piano Group Co. — Joseph Brodmann Piano — Julius Blüthner Pianofortefabrik GmbH — Kawai — L. Bösendorfer Klavierfabrik — Petrof — Shanghai Chaobo Musical Instruments Co. — Seiler — Sejung Musical Instruments Co. — Steinway & Sons — Wilhelm Schimmel Pianofortefabrik — Young Chang.

Companies that have made upright pianos in the past
Guangzhou Yamaha-Pearl River Piano Inc — GTRC Services — Johann Friedrich Luther — Tokai.

Square piano
Neupert.

Companies that have made square pianos in the past
Johann Friedrich Luther.

Pianoforte
Neupert — .

Home use electronic pianos
Avid — Australis Music — Behringer — Conrad Electronic — GTRC Services — Joseph Brodmann Piano — Kawai — Korg — Medeli — Numark — Ringway — Roland — Suzuki Musical Instruments — Yiwu Zhangfeng — Young Chang.

Companies that have made electronic pianos for home use in the past
Clef Products.

Pro/stage electronic pianos
Avid — Clavia DMI — Kawai — Medeli — Roland — Young Chang.

Companies that have made pro/stage electronic pianos in the past
Clef Products.

Companies that have made electric pianos in the past
Kawai — Tokai.

Childrens pianos
ChangShu Huasheng — .

Toy pianos
ChangShu Huasheng — Schoenhut Piano Co..

Piano playback and recording devices
Burgett Inc..

Piano pickups and microphones
Fishman — K & K Sound Systems — .

Piano accessories
Gewa Music — GRK Manufacturing — Humes & Berg — Spain Manufacturing.

Piano benches
Athletic — Australis Music — Beijing Xinghai Piano Group Limited — Barnes & Mullins — Gewa Music — GRK Manufacturing — GTRC Services — Korg — Kawai — Kennith Loop International — Nilton — Petrof — Ringway — Roland — Shanghai Chaobo Musical Instruments Co. — Steinway & Sons — Tianjin Jinbao — Tropical Music Export Enterprises — US Music Corporation — Young Chang.

Piano laquer cleaning and polishing tools and chemicals
Felix Bous.

Companies that have made piano laquer cleaning and polishing tools and chemicals in the past
Gerd H. Möller.