Plugin Alliance is a Berlin-based audio software marketplace founded in 2011 by Dirk Ulrich, the founder of German plugin developer Brainworx. The platform aggregates plugins from a large roster of partner developers and hardware brands under a single storefront and authorization system, offering titles from companies including Brainworx, SSL, Focusrite, elysia, SPL, Dangerous Music, Shadow Hills, Purple Audio, AMEK, Ampeg, Lindell Audio, Unfiltered Audio, and bx_.

The catalog spans mixing and mastering tools such as EQs, compressors, limiters, channel strips, console emulations, saturation and tape processors, reverbs and delays, vocal and guitar processors, and a smaller selection of virtual instruments. Many of the plugins are officially licensed emulations of analog hardware — for example, SSL 4000-series channel strip and bus compressor plugins, bx_console emulations, Ampeg bass amp models, and Shadow Hills mastering compressor software. Plugin Alliance also operates subscription bundles and the Mix & Master and Mega Bundles that package plugins from across its partner brands.

The company is known in professional audio circles for its aggressive sales and loyalty-coupon pricing model, its unified installer and activation manager, and its work porting analog hardware into software through its relationship with Brainworx. Plugin Alliance became part of Native Instruments' plugin group alongside iZotope and Brainworx, broadening the reach of its catalog within the larger music software market.

Plugin Alliance has 4 products cataloged on Equipboard, including Complete Collection, Multi-Effect Plugins, and Surround Tools Plugins. Their gear is featured by 2 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Tip D'Oris and M O R Δ L E S.