Alternatives to the Citadel Particle Drive preamp

MXR Fullbore Metal

Shared character: noise gate, noise, high gain settings

Dean Markley Overlord

Shared character: noise gate, noise, high gain settings

Gamechanger Audio Third Man Records Plasma Coil

Shared character: noise gate

Amptweaker Tight Metal

Shared character: noise gate, high gain settings

NUX Metal Core Deluxe

Shared character: noise gate, high gain settings

Rainger FX Break Box

Shared character: noise gate, high gain settings

A/DA MP-1

Shared character: noise gate, noise

Horizon Devices Precision Drive

Shared character: noise gate, high gain settings

Boss OD 200 Hybrid Overdrive

Shared character: noise gate, high gain settings

Bogner Burnley V2

Shared character: noise, high gain settings

NuX Drive Force

Shared character: noise gate, high gain settings

Dr. Scientist Elements

Shared character: noise gate, noise

Sonicake Factory Acoustic Preamp

Shared character: noise

Warm Audio Fluff Drive

Shared character: noise gate, high gain settings

Boss MT-2w

Shared character: noise, high gain settings

Amptweaker Tight Drive

Shared character: noise gate

Catalinbread Sabbra Cadabra Blackout

Shared character: noise gate, noise, high gain settings

Behringer VT999 Vintage Tube Monster

Shared character: noise gate, noise

MXR Micro Amp

Shared character: noise, high gain settings

EarthQuaker Devices Dirt Transmitter

Shared character: noise, high gain settings

DOD Gonkulator Ring Modulator

Shared character: noise

Catalinbread Galileo 4K Foundation Overdrive

Similar role and voicing

Mad Professor 1 Overdrive

Similar role and voicing

Amptweaker Tight Rock 2

similar tone character