Alternatives to the Boss MO-2

Behringer Octavia Octave Fuzz

Shared character: mono_synth, definition, one_octave

Boss OC-3 Super Octave

Shared character: mono_synth, fusion, one_octave

Electro-Harmonix Micro POG Polyphonic Octave Generator

Shared character: dry_signal, one_octave, signal_chain

Electro-Harmonix POG2 Polyphonic Octave Generator

Shared character: mono_synth, one_octave, ambient

Alexander Pedals Fever Pitch

Shared character: one_octave, stereo, ambient

Eventide PitchFactor

Shared character: stereo, ambient, live

Zvex Jonny Octave

Shared character: one_octave, transparent

Death By Audio Micro Harmonic Transformer

similar tone character

Death By Audio Octave Clang v2

similar tone character

EarthQuaker Devices Bit Commander Analog Octave Synth

similar tone character

Electro-Harmonix Pitch Fork Plus

similar tone character

Roger Mayer Octavia Classic

Shared character: one_octave, signal_chain

Boss PS-6

Shared character: mono, premier_guitar, one_octave

Roger Mayer Octavia

Shared character: one_octave, live

Tycobrahe Octavia

Shared character: one_octave

Meris MR Hedra

similar tone character

Beetronics Whoctahell V2 Low Octave Beeast

similar tone character

Walrus Audio Luminary

similar tone character