Alternatives to the Roger Mayer Octavia Classic

EarthQuaker Devices Tentacle V2

Shared character: neck, each note, glassy

Behringer Octavia Octave Fuzz

Shared character: two octave down effect, internal transformer, tight tracking

Fulltone Ultimate Octave

Shared character: neck, bright, tight tracking

Zvex Jonny Octave

Shared character: internal transformer, tight tracking, one octave

Death By Audio Octave Clang v2

Shared character: each note, tight tracking, one octave

Hungry Robot The Monastery Octave Generator

Shared character: each note, glassy, tight tracking

Boss MO-2

Shared character: one octave, signal chain

Subdecay Octave Theory Octave Modulator Synthesizer

Shared character: tight tracking, one octave

Electro-Harmonix Pico POG

Shared character: each note, tight tracking, one octave

Boss OC-5

Shared character: tight tracking, one octave, signal chain

Beetronics Whoctahell V2 Low Octave Beeast

Shared character: tight tracking, one octave

Boss OC-3 Super Octave

Shared character: digital, tight tracking, one octave

Meris Enzo X

Shared character: tight tracking, one octave, signal chain

Mu-Tron Octave Divider

Shared character: tight tracking, one octave, digital

Tycobrahe Octavia

Shared character: neck, internal transformer, tight tracking

EarthQuaker Devices Tentacle

Shared character: each note, one octave, lead

Walrus Audio Luminary

Shared character: tight tracking, one octave, lead

smallsound/bigsound Buzzz

Shared character: one octave, fuzz, gain

JHS Double Dragon

Shared character: each note, tight tracking, one octave

KMA Machines Mandrake

Shared character: tight tracking, one octave

Death By Audio Robot

Shared character: one octave, digital, fuzz

Electro-Harmonix POG

Shared character: one octave, signal chain

TC Electronic SUB N UP

Shared character: tight tracking, one octave

Roger Mayer Octavia

similar tone character