Voxengo is an audio software company founded by developer Aleksey Vaneev in December 2002, following the release of its first successful product, the CurveEQ equalizer plugin. Based in Russia, the company has grown to offer a catalog of over 50 plugins spanning equalization, dynamics processing, saturation, spatial effects, and audio analysis, available in VST, VST3, AudioUnit, and AAX formats for macOS and Windows.

Among Voxengo's most recognized products are Elephant, a mastering limiter prized for its sonic transparency; SPAN, a widely adopted free real-time FFT spectrum analyzer that has become a staple utility in many producers' toolkits; GlissEQ, a dynamic equalizer whose gain adapts to signal level; and Voxformer, a vocal channel strip. Other notable offerings include CurveEQ (spline equalizer with spectrum matching), Soniformer (multiband dynamics processor), TEOTE (automatic mastering finisher), Shinechilla (de-esser and spectral processor), and OldSkoolVerb (algorithmic reverb). The company also provides several free plugins including SPAN, MSED (mid/side encoder-decoder), OldSkoolVerb, Boogex (guitar amp simulator), and Marvel GEQ (linear-phase graphic equalizer).

Voxengo's plugins have been adopted by Grammy-winning and Billboard-charting producers, mixing engineers, and mastering engineers worldwide, with registered users in over 100 countries. Aleksey Vaneev, who handles all DSP development, is also known in the scientific computing community for his BiteOpt optimization algorithm, which placed second in the GECCO 2019 black-box optimization competition.

Voxengo has 36 products cataloged on Equipboard, including Compressor Plugins, EQ Plugins, and Enhancer Plugins. Their gear is featured by 55 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Seven Lions, Crisis Era, and Black Sun Empire.