Alternatives to the Hungry Robot The Monastery Octave Generator

TC Electronic SUB N UP

Shared character: tight tracking, one octave, thickness

TC Electronic Sub 'N' Up Mini

Shared character: mono synth, tight tracking, one octave

EarthQuaker Devices Tentacle V2

Shared character: each note, glassy, tight tracking

Behringer Octave Divider

Shared character: each note, tight tracking, one octave

Behringer Octavia Octave Fuzz

Shared character: mono synth, tight tracking, one octave

Boss OC-3 Super Octave

similar tone character

Roger Mayer Octavia Classic

Shared character: each note, glassy, tight tracking

Electro-Harmonix POG2 Polyphonic Octave Generator

Shared character: mono synth, tight tracking, one octave

Roger Mayer Octavia

Shared character: each note, tight tracking, one octave

Mu-Tron Octave Divider

similar tone character

Pigtronix MS2 Mothership 2 Analog Synthesizer

similar tone character

Meris Enzo X

similar tone character

Electro-Harmonix POG

Shared character: mono synth, one octave, signal chain

Boss OC-2 Octaver

Shared character: dry signal, mono synth, tight tracking

Boss OC-2 Octave

Shared character: tight tracking, one octave, signal chain

Electro-Harmonix Pico POG

Shared character: each note, dry signal, mono synth

Mooer Tender Octaver MKII

Shared character: tight tracking, one octave, signal chain

Beetronics Whoctahell V2 Low Octave Beeast

Shared character: mono synth, tight tracking, one octave

Electro-Harmonix Micro POG Polyphonic Octave Generator

Shared character: dry signal, tight tracking, one octave

Subdecay Octasynth Octave Synthesizer

Shared character: mono synth, tight tracking, one octave

Boss OC-5

Shared character: tight tracking, one octave, signal chain

EarthQuaker Devices Bit Commander Analog Octave Synth

Shared character: each note, mono synth, tight tracking

Fulltone Ultimate Octave

Shared character: tight tracking, one octave, bright

JHS Double Dragon

Shared character: each note, tight tracking, one octave