I-Exist

Progressive Metal - USA

I, Omega

Progressive Metal - USA

I, The Deceiver

Progressive Metal - Switzerland

IA (FIN)

Progressive Metal - Finland

Ian Parry

Progressive Metal - Netherlands

Icaria

Progressive Metal - USA

Ice Age (USA)

Progressive Metal - USA

Icefish

Progressive Metal - Italy

Ichika

Progressive Metal - Japan

Ideosphere

Progressive Metal - USA

Idiocracy Project

Progressive Metal - Germany

Idiom

Progressive Metal - United-Kingdom

If I Were A Gladiator

Progressive Metal - USA

Ihlo

Progressive Metal - United-Kingdom

Ilenkus

Progressive Metal - Ireland

Illudria

Progressive Metal - USA

Illumion

Progressive Metal - Netherlands

Illusion (NOR)

Progressive Metal - Norway

ILP

Progressive Metal - Indonesia

Imagery (BRA)

Progressive Metal - Brazil

Imaginoid

Progressive Metal - Poland

Immanent

Progressive Metal - France

Immanent Distance

Progressive Metal - Belgium

Immerse

Progressive Metal - United-Kingdom

Imminent Sonic Destruction

Progressive Metal - USA

Immortal Guardian

Progressive Metal - USA

Immortal Soul

Progressive Metal - USA

Imperial Gates

Progressive Metal - France

Imperial Rage

Progressive Metal - USA

Imperium (CAN)

Progressive Metal - Canada

Impish (FIN)

Progressive Metal - Finland

Implosion

Progressive Metal - Greece

ImproVision

Progressive Metal - Norway

In Morpheus' Arms

Progressive Metal - Germany

In Myst

Progressive Metal - France

In Search For

Progressive Metal - Belarus

In Search Of Sight

Progressive Metal - USA

In Search Of Sun

Progressive Metal - United-Kingdom

In The Name

Progressive Metal - Canada

In The Presence Of Enemies

Progressive Metal - USA

In The Woods...

Progressive Metal - Norway

In Virtue

Progressive Metal - USA

In-Tension

Progressive Metal - Netherlands

Incarnate (NZ)

Progressive Metal - New-Zealand

Inception (SWE)

Progressive Metal - Sweden

Inception (USA)

Progressive Metal - USA

Incura

Progressive Metal - Canada

Incurvatus

Progressive Metal - Sweden

Indefinite Execution

Progressive Metal - Croatia

Independência

Progressive Metal - Brazil

Indeterminate

Progressive Metal - Finland

Indrâzor

Progressive Metal - France

Indukti

Progressive Metal - Poland

Inepsys

Progressive Metal - France

Inertial Oblivion

Progressive Metal - Greece

Infinite Spectrum

Progressive Metal - USA

Infinity Minus One

Progressive Metal - USA

Influence X

Progressive Metal - Switzerland

Ingermanland

Progressive Metal - Norway

Inherently Lost

Progressive Metal - USA

Initial Gravity

Progressive Metal - Argentina

InMe

Progressive Metal - United-Kingdom

Innenweg

Progressive Metal - Germany

Inner Cabala

Progressive Metal - Netherlands

Inner Chaos

Progressive Metal - France

Inner Odyssey

Progressive Metal - Canada

Inner Quest

Progressive Metal - Italy

Inner Resonance

Progressive Metal - USA

Inner Xpose

Progressive Metal - Spain

Innernoir

Progressive Metal - Russia

Innersense

Progressive Metal - Russia

Innerside

Progressive Metal - France

Innosense

Progressive Metal - Greece

Insanity Dawn

Progressive Metal - Brazil

Inside Mankind

Progressive Metal - Italy

Insigne

Progressive Metal - Poland

Insomnia Asylum

Progressive Metal - France

Intandem

Progressive Metal - Canada

Intensity (GRC)

Progressive Metal - Greece

Interiors

Progressive Metal - USA

Intervals

Progressive Metal - Canada

Into My Houses

Progressive Metal - Finland

Into The Woods

Progressive Metal - United-Kingdom

Intronaut

Progressive Metal - USA

Intrust

Progressive Metal - USA

Invicta (USA-1)

Progressive Metal - USA

Invocation (UK)

Progressive Metal - United-Kingdom

Inward Path

Progressive Metal - Ukraine

Iomair

Progressive Metal - Canada

Ipsilon

Progressive Metal - Spain

Irepress

Progressive Metal - USA

Iris Divine

Progressive Metal - USA

Iron Guard

Progressive Metal - United-Kingdom

Ishtar (NZ)

Progressive Metal - New-Zealand

Island (CH)

Progressive Metal - Switzerland

Isospin

Progressive Metal - Greece

Isthmus

Progressive Metal - USA

Isurus (UK)

Progressive Metal - United-Kingdom

Ivanhoe

Progressive Metal - Germany

Ivo Petrovic

Progressive Metal - Croatia