NIIO Analog is a boutique manufacturer of analog audio processing hardware, producing both Eurorack modules and standalone rackmount processors under the tagline "quality analog with character." Their Eurorack lineup spans utility and sequencing modules including the Graphic Envelope (an 8-stage envelope generator), Sequential Logic/Switch, Dual Sequential CV, Clock Divider, AR Clock Divider, Dual Level (a manual gain control with VU meters compatible with both 5V and 10V signals), and a 3-Bit Bit Reducer with VCA.

The company is perhaps best known for the Iotine Core series of 3U rackmount processors. The Iotine Core 4 is an all-analog general-purpose audio processor offering dynamic processing through to extreme saturation and distortion, with a choice of seven saturation types per channel, while the Iotine Core 3 is a dual filter bank. The brand's design philosophy leans toward hands-on character processing rather than transparent utility, appealing to users looking for analog tone shaping and sound mangling tools.

Niio Analog has 2 products cataloged on Equipboard, including Effects Processors. Their gear is featured by 5 artists, with the strongest followings in Electronic and Rock. Notable users include Deadmau5, Torsten Kinsella, and Tzusing.