BLEASS is a French audio developer based in Tourcoing, at the Plaine Images creative industries hub in northern France. Founded in 2018, the company builds digital musical instruments and effects plugins for macOS, Windows, and iOS, with a catalog of over 26 titles distributed through their own site as well as Plugin Boutique and other retailers. Their plugins are released in VST3, Audio Unit, and AAX formats, and share a design philosophy centered on clear, self-explanatory interfaces.

The company's product line spans synthesizers such as the analog-style Alpha, the FM-focused Omega, the hybrid Monolit and Megalit, and the sample-based SampleWiz 2, alongside the Groovebox production instrument and an Arpeggiator. Their effects catalog covers classic processors like Chorus, Delay, Reverb, Saturator, and Shimmer, plus more experimental creative tools including Granulizer, Motion EQ, Motion FX, Dragonfly, Phase Mutant, and Slow Machine. Vocal-oriented plugins Voices and Vox round out the lineup.

BLEASS powered the audio engine for Jean-Michel Jarre's generative album project EōN, and has collaborated with artists including Jordan Rudess and Canblaster. The brand is frequently covered in plugin-focused outlets such as KVR Audio and MusicTech, and is known in the iOS music-making community for porting desktop-grade synthesis and effects to the iPad.

BLEASS has 47 products cataloged on Equipboard, including Soft Synth Presets, Expansion Packs, and Synth Plugins. Most BLEASS products sit on the budget-friendly end of the spectrum.