The Keeley Seafoam Plus Chorus/Vibrato is a Keeley chorus pedal, currently around $160.65. Close alternatives include the Boss CE-2 Chorus and the EarthQuaker Devices Sea Machine. It pairs well with the Revv Generator G20 20-Watt 2-Channel Tube Head and the Orange Rockerverb 50 MkIII 2-Channel 50W Head.

Keeley Seafoam Plus Chorus/Vibrato

Keeley · pedal

The Keeley Seafoam Chorus is a smooth, ethereal analog-voiced chorus and vibrato that uses an analog-digital design with an FET input to stay true to your core tone. Its True Chorus mode adds second and third voices with slight timing and pitch differences from the original signal, creating a more organic, three-dimensional chorus than typical units. Tone and blend controls are central to its range, letting players match darker humbucker or brighter single-coil guitars and push rate and depth for lush, trippy vibrato textures. The circuit pairs an uncommon IC with an opto-isolator LFO to deliver wide, shimmering modulation while suppressing the hum and noise common to analog choruses. It suits clean ambient, pop, and dreamy lead tones.

What stands out

  • “Its standout strength is gorgeous, wide chorus that stays true to the dry tone with low noise”

    — from the community notes

  • “The Seafoam Chorus produces a stunning, wide chorus with genuine depth and an organic shimmer, and its True Chorus voicing adds second and third voices for a more dimensional, realistic effect than standard chorus circuits”

    — from the reviews

  • “Players describe it as a lush, shimmering chorus with a wide, ethereal depth and an organic, real-sounding character thanks to its True Chorus multi-voice approach”

    — from the community notes

  • “ethereal analog-voiced chorus and vibrato that uses an analog-digital design with an fet input to stay true to your core tone”

    — from the listing

  • “It suits clean ambient, pop, and dreamy lead tones”

    — from the listing

  • chorus
  • organic
  • lush
  • vibrato
  • ambient
  • low noise
  • ethereal
  • digital
$160.65View on Reverb

Price updated Oct 25, 2026

Genres the Keeley Seafoam Plus Chorus/Vibrato is commonly used in

  • Ambient
  • Post Punk
    citedInferred from shared tonal signals, not a stated genre tag.
  • Shoegaze
    citedInferred from shared tonal signals, not a stated genre tag.
  • Post Rock
    citedInferred from shared tonal signals, not a stated genre tag.
  • Indie
    citedInferred from shared tonal signals, not a stated genre tag.
  • Electronic
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Keeley Seafoam Plus Chorus/Vibrato

Revv Generator G20 20-Watt 2-Channel Tube Head

Revv

20% match
$1199via Reverb

Revv Generator G20 20-Watt 2-Channel Tube Head's own high gain character is the real reason this is worth trying

Comes later in the signal chain

Orange Rockerverb 50 MkIII 2-Channel 50W Head

Orange

19% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (transparent → mid-forward)

What Orange Rockerverb 50 MkIII 2-Channel 50W Head brings here leans toward full — that's worth building a pairing around

Comes later in the signal chain

Synergy SL2 Module

Synergy

tonal match

Comes later in the signal chain

Put Synergy SL2 Module after Keeley Seafoam Plus Chorus/Vibrato

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt

Mesa Boogie

tonal match

Comes later in the signal chain

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt goes after Keeley Seafoam Plus Chorus/Vibrato in the chain

Marshall Studio JCM900 SN20H

Marshall

tonal match

Comes later in the signal chain

Marshall Studio JCM900 SN20H goes after Keeley Seafoam Plus Chorus/Vibrato in the chain

Friedman BE-Mini Head

Friedman

tonal match
$195.67via Reverb

Comes later in the signal chain

Put Friedman BE-Mini Head after Keeley Seafoam Plus Chorus/Vibrato

Hughes & Kettner Warp 7

Hughes & Kettner

tonal match
$901.54via Reverb

Comes later in the signal chain

Put Hughes & Kettner Warp 7 after Keeley Seafoam Plus Chorus/Vibrato

Ceriatone 2202H

Ceriatone

tonal match

Comes later in the signal chain

Put Ceriatone 2202H after Keeley Seafoam Plus Chorus/Vibrato

Pedals that stack with the Keeley Seafoam Plus Chorus/Vibrato

JHS Smiley

JHS Pedals

22% match

JHS Smiley's own fuzzy character is the real reason this is worth trying

Comes earlier in the signal chain

Fjord Fuzz Odin

Fjord Fuzz

22% match
$199via Reverb

What Fjord Fuzz Odin brings here leans toward fuzzy — that's worth building a pairing around

Comes earlier in the signal chain

Meris Polymoon

Meris

8% match
$299via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Meris Polymoon's modulated voice goes after Keeley Seafoam Plus Chorus/Vibrato in the signal chain — it's not there to compete with Keeley Seafoam Plus Chorus/Vibrato's own lush character — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Boss RV-5 Digital Reverb

pedal

8% match
$81.48via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Run Boss RV-5 Digital Reverb after Keeley Seafoam Plus Chorus/Vibrato in the signal chain, where it won't crowd Keeley Seafoam Plus Chorus/Vibrato — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Dr. Scientist Frazz Dazzler V2

Dr Scientist

tonal match
$204.36via Reverb

Comes earlier in the signal chain

Put Dr. Scientist Frazz Dazzler V2 in front of Keeley Seafoam Plus Chorus/Vibrato

Warm Audio Jet Phaser

Warm Audio

tonal match
$109.01via Reverb

Put Warm Audio Jet Phaser after Keeley Seafoam Plus Chorus/Vibrato: modulation reads clearest once the core tone is set

Death By Audio Destruction

Death By Audio

tonal match
$137.70via Reverb

Comes earlier in the signal chain

Death By Audio Destruction goes in front of Keeley Seafoam Plus Chorus/Vibrato in the chain

Subdecay F-Bomb

Subdecay

tonal match
$229.95via Reverb

Comes earlier in the signal chain

Subdecay F-Bomb goes in front of Keeley Seafoam Plus Chorus/Vibrato in the chain

Cheaper alternatives

TC Electronic Gravy

TC Electronic

61% similarity
$78via Reverb

Shared character: vibrato, chorus, ambient

Providence ADC-4 Anadime Analog Chorus

Providence

59% similarity
$117.01via Reverb

Shared character: modulation, subtle, clean

TC Electronic Corona Mini Chorus Effetto A

TC Electronic

55% similarity
$84.31via Reverb

Shared character: chorus, ambient, modulation

Electro-Harmonix Eddy Vibrato/Chorus

Electro-Harmonix

54% similarity
$96.99via Reverb

Shared character: vibrato, ambient, modulation

Walrus Audio Fundamental Chrous

Walrus Audio

95% similarity
$99.99via Reverb

similar tone character

Boutique & premium upgrades

Red Witch Empress

Red Witch

66% similarity
$249via Reverb

Shared character: vibrato, chorus, modulation

SolidGoldFX Aurras Optical Vibraphase

Solidgoldfx

64% similarity
$209via Reverb

Shared character: vibrato, modulation, subtle

Old Blood Noise Endeavors Reflector Chorus V2

Old Blood Noise Endeavors

62% similarity
$223.72via Reverb

Shared character: vibrato, noise, chorus

JAM Pedals RetroVibe Mk.4

Jam Pedals

59% similarity
$449via Reverb

Shared character: vibrato, chorus, digital

Boss CE-2W Chorus Waza Craft

Boss

57% similarity
$219.99via Reverb

Shared character: vibrato, low noise floor, chorus

ZVEX Instant Lo-Fi Junky

Zvex

57% similarity
$238.82via Reverb

Shared character: vibrato, chorus, modulation

Similar charactersee all similar tone character →

Boss CE-2 Chorus

Boss

62% similarity
$159via Reverb

Shared character: low noise floor, chorus, modulation

EarthQuaker Devices Sea Machine

EarthQuaker Devices

60% similarity
$199via Reverb

Shared character: chorus, ambient, modulation

Mojo Hand FX Swim Team

Mojo Hand Fx

58% similarity
$159via Reverb

Shared character: chorus, ambient, modulation

Dunlop JHMS3 Hendrix Shrine Series Uni-Vibe

Dunlop

58% similarity
$169.23via Reverb

Shared character: vibrato, chorus, modulation

Walrus Audio Polychrome

Walrus Audio

57% similarity
$207.90via Reverb

Shared character: vibrato, chorus, subtle

Catalinbread Callisto Mk. II

Catalinbread

55% similarity

Shared character: vibrato, noise, chorus

See all alternatives to the Keeley Seafoam Plus Chorus/Vibrato (cheaper + boutique) →

Questions people ask

What are good alternatives to the Keeley Seafoam Plus Chorus/Vibrato?+

The closest matches in character are the Boss CE-2 Chorus, the EarthQuaker Devices Sea Machine, the Mojo Hand FX Swim Team. Budget picks: TC Electronic Gravy, Providence ADC-4 Anadime Analog Chorus, TC Electronic Corona Mini Chorus Effetto A. Boutique upgrades: Red Witch Empress, SolidGoldFX Aurras Optical Vibraphase, Old Blood Noise Endeavors Reflector Chorus V2.

What pairs well with the Keeley Seafoam Plus Chorus/Vibrato?+

Strong matches from rig and tone-complementarity evidence: Revv Generator G20 20-Watt 2-Channel Tube Head, Orange Rockerverb 50 MkIII 2-Channel 50W Head, Synergy SL2 Module — Revv Generator G20 20-Watt 2-Channel Tube Head's own high gain character is the real reason this is worth trying.

How much does the Keeley Seafoam Plus Chorus/Vibrato cost?+

Around $160.65 (live listing price, updated Oct 25, 2026).

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