Alternatives to the Boss MO-2

Behringer Octavia Octave Fuzz

Shared character: mono synth, definition, one octave

Behringer Octave Divider

similar tone character

Death By Audio Micro Harmonic Transformer

Shared character: mono synth, one octave, ambient

Death By Audio Octave Clang v2

Shared character: mono synth, one octave

Electro-Harmonix Micro POG Polyphonic Octave Generator

Shared character: dry signal, one octave, signal chain

Roger Mayer Octavia Classic

Shared character: one octave, signal chain

Alexander Pedals Fever Pitch

Shared character: one octave, stereo, ambient

Meris Enzo X

Shared character: mono, mono synth, one octave

EarthQuaker Devices Bit Commander Analog Octave Synth

Shared character: mono synth, one octave, signal chain

Roger Mayer Octavia

Shared character: one octave

Zvex Jonny Octave

Shared character: one octave, transparent

Electro-Harmonix Pitch Fork Plus

similar tone character

Meris Hedra Shifter

similar tone character

Meris MR Hedra

Shared character: dry signal, mono synth, one octave

Boss PS-6

Shared character: premier guitar, mono, one octave

Chase Bliss Onward

Shared character: mono synth, stereo, ambient

Tycobrahe Octavia

Shared character: one octave