| Vocalist | The Final Experiment | The Final Experiment | Actual Fantasy | Into the Electric Castle | The Dream Sequencer | Flight of the Migrator | Ayreonauts Only | The Human Equation | 01011001 | Elected | Timeline | The Theory of Everything | The Theater Equation | The Source | Ayreon Universe | Electric Castle Live and Other Tales | Transitus | 01011001 – Live Beneath the Waves | Total |
Amanda Somerville
HDK, Kiske/Somerville | | | | | | | | | | | | | | | | | | | 1 |
Andi Deris
Helloween | | | | | | | | | | | | | | | | | | | 1 |
Anneke van Giersbergen
ex-The Gathering, Agua de Annique | | | | | | | | | | | | | | | | | | | 6 |
Astrid van der Veen
Ambeon | | | | | | | | | | | | | | | | | | | 2 |
Barry Hay
Golden Earring | | | | | | | | | | | | | | | | | | | 1 |
Bob Catley
Magnum, ex-Hard Rain | | | | | | | | | | | | | | | | | | | 1 |
Brittney Slayes
Unleash the Archers | | | | | | | | | | | | | | | | | | | 1 |
Bruce Dickinson
Iron Maiden, ex-Samson | | | | | | | | | | | | | | | | | | | 1 |
Cammie Gilbert
Oceans of Slumber | | | | | | | | | | | | | | | | | | | 1 |
Caroline Westendorp
The Charm the Fury | | | | | | | | | | | | | | | | | | | 1 |
Cristina Scabbia
Lacuna Coil | | | | | | | | | | | | | | | | | | | 1 |
Damian Wilson
ex-Rick Wakeman, Threshold, Landmarq, Headspace | | | | | | | | | | | | | | | | | | | 7 |
Daniel Gildenlöw
Pain of Salvation | | | | | | | | | | | | | | | | | | | 2 |
| Debby Schreuder | | | | | | | | | | | | | | | | | | | 1 |
Dee Snider
ex-Twisted Sister | | | | | | | | | | | | | | | | | | | 1 |
Devin Townsend
Strapping Young Lad, The Devin Townsend Band | | | | | | | | | | | | | | | | | | | 1 |
Devon Graves
Deadsoul Tribe, ex-Psychotic Waltz | | | | | | | | | | | | | | | | | | | 2 |
Dianne van Giersbergen
Ex Libris | | | | | | | | | | | | | | | | | | | 2 |
Edward Reekers
ex-Kayak | | | | | | | | | | | | | | | | | | | 6 |
Edwin Balogh
ex-Omega | | | | | | | | | | | | | | | | | | | 2 |
Eric Clayton
Saviour Machine | | | | | | | | | | | | | | | | | | | 2 |
| Esther Ladiges | | | | | | | | | | | | | | | | | | | 1 |
Fabio Lione
Vision Divine, Rhapsody of Fire | | | | | | | | | | | | | | | | | | | 1 |
Fish
ex-Marillion | | | | | | | | | | | | | | | | | | | 2 |
Floor Jansen
After Forever, ReVamp, Nightwish | | | | | | | | | | | | | | | | | | | 4 |
Gary Hughes
Ten | | | | | | | | | | | | | | | | | | | 1 |
George Oosthoek
Orphanage, Kutschurft | | | | | | | | | | | | | | | | | | | 2 |
Hansi Kürsch
Blind Guardian, Demons & Wizards | | | | | | | | | | | | | | | | | | | 4 |
Heather Findlay
Mostly Autumn | | | | | | | | | | | | | | | | | | | 2 |
Ian Parry
Elegy | | | | | | | | | | | | | | | | | | | 3 |
Irene Jansen
ex-Karma | | | | | | | | | | | | | | | | | | | 5 |
Jacqueline Govaert
Krezip | | | | | | | | | | | | | | | | | | | 1 |
James LaBrie
Dream Theater | | | | | | | | | | | | | | | | | | | 3 |
Janne JB Christoffersson
Grand Magus | | | | | | | | | | | | | | | | | | | 1 |
Jan-Chris de Koeijer
Gorefest | | | | | | | | | | | | | | | | | | | 1 |
| Jan Willem Ketelaers | | | | | | | | | | | | | | | | | | | 3 |
Jasper Steverlinck
Arid | | | | | | | | | | | | | | | | | | | 1 |
Jay van Feggelen
ex-Bodine | | | | | | | | | | | | | | | | | | | 3 |
Johan Edlund
Tiamat, Lucyfire | | | | | | | | | | | | | | | | | | | 1 |
Johanne James
Threshold, Kyrbgrinder | | | | | | | | | | | | | | | | | | | 1 |
John "Jaycee" Cuijpers
Praying Mantis | | | | | | | | | | | | | | | | | | | 4 |
John Wetton
Asia, ex-King Crimson | | | | | | | | | | | | | | | | | | | 1 |
Jonas Renkse
Katatonia | | | | | | | | | | | | | | | | | | | 3 |
Jørn Lande
Jorn, ex-Masterplan, ex-Ark, Vagabond, etc. | | | | | | | | | | | | | | | | | | | 1 |
| Lana Lane | | | | | | | | | | | | | | | | | | | 3 |
Lenny Wolf
Kingdom Come | | | | | | | | | | | | | | | | | | | 1 |
Leon Goewie
Vengeance | | | | | | | | | | | | | | | | | | | 2 |
Liselotte Hegt
Dial | | | | | | | | | | | | | | | | | | | 2 |
Lisette van den Berg
Scarlet Stories | | | Scarlet Stories | | | | | | | | | | | | | | | | 4 |
| Lucie Hillen | | | | | | | | | | | | | | | | | | | 1 |
Magali Luyten
Beautiful Sin, Virus IV | | | | | | | | | | | | | | | | | | | 3 |
Magnus Ekwall
The Quill | | | | | | | | | | | | | | | | | | | 2 |
Marcela Bovio
Elfonía, Stream of Passion, MaYaN | | | | | | | | | | | | | | | | | | | 7 |
Marjan Welman
Elister, Autumn | | | | | | | | | | | | | | | | | | | 2 |
Mark Jansen
Epica | | | | | | | | | | | | | | | | | | | 1 |
Mark McCrite
Rocket Scientists | | | | | | | | | | | | | | | | | | | 1 |
Marko Hietala
Nightwish, Tarot | | | | | | | | | | | | | | | | | | | 2 |
Michael Eriksen
Circus Maximus | | | | | | | | | | | | | | | | | | | 1 |
Michael "Mike" Mills
Toehider | | | | | | | | | | | | | | | | | | | 6 |
Mikael Åkerfeldt
Opeth, Bloodbath | | | | | | | | | | | | | | | | | | | 1 |
Mike Baker
Shadow Gallery | | | | | | | | | | | | | | | | | | | 1 |
| Mirjam van Doorn | | | | | | | | | | | | | | | | | | | 1 |
Mouse
Tuesday Child | | | | | | | | | | | | | | | | | | | 2 |
Neal Morse
ex-Spock's Beard, Transatlantic | | | | | | | | | | | | | | | | | | | 1 |
Nils K. Rue
Pagan's Mind | | | | | | | | | | | | | | | | | | | 1 |
| Okkie Huysdens | | | | | | | | | | | | | | | | | | | 1 |
Paul Manzi
ex-Arena | | | | | | | | | | | | | | | | | | | 1 |
Peter Daltrey
ex-Kaleidoscope | | | | | | | | | | | | | | | | | | | 2 |
| Phideaux Xavier | | | | | | | | | | | | | | | | | | | 2 |
Ralf Scheepers
Primal Fear, ex-Gamma Ray | | | | | | | | | | | | | | | | | | | 1 |
Robby Valentine
Valentine | | | | | | | | | | | | | | | | | | | 2 |
Robert Soeterboek
Wicked Sensation | | | | | | | | | | | | | | | | | | | 6 |
Robert Westerholt
Within Temptation | | | | | | | | | | | | | | | | | | | 1 |
| Rodney Blaze | | | | | | | | | | | | | | | | | | | 1 |
Russell Allen
Symphony X, Adrenaline Mob | | | | | | | | | | | | | | | | | | | 2 |
Ruud Houweling
Cloudmachine | | | | | | | | | | | | | | | | | | | 2 |
Sara Squadrani
Ancient Bards | | | | | | | | | | | | | | | | | | | 1 |
Sharon den Adel
Within Temptation | | | | | | | | | | | | | | | | | | | 1 |
Simone Simons
Epica | | | | | | | | | | | | | | | | | | | 5 |
Steve Lee
Gotthard | | | | | | | | | | | | | | | | | | | 1 |
Timo Kotipelto
Stratovarius, Kotipelto | | | | | | | | | | | | | | | | | | | 1 |
Tobias Sammet
Edguy, Avantasia | | | | | | | | | | | | | | | | | | | 2 |
Tom S. Englund
Evergrey | | | | | | | | | | | | | | | | | | | 2 |
Tommy Giles Rogers
Between the Buried and Me | | | | | | | | | | | | | | | | | | | 1 |
Tommy Karevik
Kamelot, Seventh Wonder | | | | | | | | | | | | | | | | | | | 4 |
Ty Tabor
King's X, Platypus, The Jelly Jam | | | | | | | | | | | | | | | | | | | 1 |
| Wilmer Waarbroek | | | | | | | | | | | | | | | | | | | 3 |
| Wudstik | | | | | | | | | | | | | | | | | | | 3 |
Zaher Zorgati
Myrath | | | | | | | | | | | | | | | | | | | 1 |