Alternatives to the Electro-Harmonix Slammi Plus

Behringer Octavia Octave Fuzz

Shared character: mono_synth, tight_tracking, one_octave

Boss PS-5 Super Shifter

Shared character: whammy, pitch_modulation, expression_pedal

Donner Harmonic Square Octave/Pitch Shifter

similar tone character

Behringer Octave Divider

similar tone character

Electro-Harmonix POG2 Polyphonic Octave Generator

Shared character: expression_pedal, mono_synth, tight_tracking

DigiTech WH-1 Whammy Pedal

Shared character: whammy, expression_pedal, tight_tracking

DigiTech Whammy Pitch-Shifting Pedal

Shared character: pitch_modulation, whammy, expression_pedal

Mu-Tron Octave Divider

Shared character: expression_pedal, mono_synth, tight_tracking

Boss X-100 Poly Shifter

Shared character: whammy, expression_pedal, one_octave

Boss XS 100 Poly Shifter

Shared character: whammy, expression_pedal, one_octave

EarthQuaker Devices Rainbow Machine

Shared character: pitch_modulation, tight_tracking, one_octave

Electro-Harmonix Intelligent Harmony Machine

Shared character: pitch_modulation, tight_tracking, one_octave

440 Distribution DigiTech Drop Polyphonic Droptune

Shared character: whammy, tight_tracking, one_octave

Boss XS-1

Shared character: guitar, tight_tracking, one_octave

Meris Hedra Shifter

Shared character: pitch_modulation, tight_tracking

Digitech Whammy 5

Shared character: whammy, expression_pedal, one_octave

Electro-Harmonix Pitch Fork Polyphonic Pitch Shifter

Shared character: pitch_modulation, whammy, expression_pedal

Subdecay Octasynth Octave Synthesizer

Shared character: mono_synth, tight_tracking, one_octave

Meris MR Hedra

Shared character: pitch_modulation, whammy, mono_synth

Boss PS-6

Shared character: pitch_modulation, expression_pedal, tight_tracking

Mooer Polyphonic

Shared character: pitch_modulation, tight_tracking, one_octave

DigiTech Whammy MN Mono Neon

Shared character: pitch_modulation, whammy, expression_pedal

EVH Pitch Fork

Shared character: expression_pedal, tight_tracking, one_octave

Electro-Harmonix Pico Pitch Fork

Shared character: pitch_modulation, tight_tracking, one_octave

TC Electronic Pitchfork

Shared character: pitch_modulation, one_octave

Hotone Skyline Harmony Pitch Shifter/Harmonist

Shared character: pitch_modulation, tight_tracking

Subdecay M3 Monophonic

Shared character: mono_synth, tight_tracking, guitar

Meris Enzo Multi-Voice Synthesizer

Shared character: guitar, mono_synth, tight_tracking