artist,genre,country
I AM ABOVE ON THE LEFT,RIO/Avant-Prog,Russia
I AM THE ARCHITECT,Post Rock/Math rock,Germany
I AM THE MANIC WHALE,Crossover Prog,United Kingdom
I AM THREE PEOPLE,Heavy Prog,Finland
I AM WAITING FOR YOU LAST SUMMER,Post Rock/Math rock,Russia
I AND THOU,Neo-Prog,United States
I BOW CANDLES,Heavy Prog,Multi-National
I GIULLARI DI CORTE,Rock Progressivo Italiano,Italy
I HEAR SIRENS,Post Rock/Math rock,United States
I HEARD FROM LAVINIA,Crossover Prog,Italy
I KNOW YOU WELL MISS CLARA,Jazz Rock/Fusion,Indonesia
I LIKE TRAINS,Post Rock/Math rock,United Kingdom
I VIAGGI DI MADELEINE,Heavy Prog,Italy
I WAS GIVEN FEET TO FOLLOW YOU,Post Rock/Math rock,United States
I WILL KILL CHITA,Post Rock/Math rock,Russia
LE,RIO/Avant-Prog,France
I.AB,Crossover Prog,United States
I.C.U.,Symphonic Prog,Germany
I.D. COMPANY,Eclectic Prog,Germany
I.E.M.,Psychedelic/Space Rock,United Kingdom
IAKO BEI,Crossover Prog,Slovakia
IAMTHEMORNING,Crossover Prog,Russia
IANVA,Rock Progressivo Italiano,Italy
IBARAKI,Tech/Extreme Prog Metal,United States
IBIO,Prog Folk,Spain
IBIS,Rock Progressivo Italiano,Italy
IBIS,Jazz Rock/Fusion,Sweden
IBLISS,Krautrock,Germany
ICARUS,Jazz Rock/Fusion,United Kingdom
ICE,Neo-Prog,Netherlands
ICE AGE,Progressive Metal,United States
ICEBERG,Jazz Rock/Fusion,Spain
ICEBURN,Experimental/Post Metal,United States
ICED INK,Eclectic Prog,United States
ICEFISH,Progressive Metal,Multi-National
ICHTHYANDER DAD'S ONLY DOLPHIN,Eclectic Prog,Ukraine
ICI MAINTENANTS,Psychedelic/Space Rock,United Kingdom
ICONIC SKY,Crossover Prog,United Kingdom
ICONOCLASTA,Jazz Rock/Fusion,Mexico
ICSIS,RIO/Avant-Prog,France
ICYCORE,Progressive Metal,Italy
ID,Psychedelic/Space Rock,United States
TH D,Neo-Prog,Multi-National
IDEAMEN,Progressive Metal,United States
IDEE CONFUSE,Heavy Prog,Italy
IDENTIFIED,Experimental/Post Metal,United States
IDIOT FLESH,RIO/Avant-Prog,United States
IDIOT SAINT CRAZY,Experimental/Post Metal,France
GIUSEPP ELASI,Progressive Electronic,Italy
IF,Jazz Rock/Fusion,United Kingdom
IF THESE TREES COULD TALK,Post Rock/Math rock,United States
IFSOUNDS / EX IF,Crossover Prog,Italy
IGAYON,Crossover Prog,Israel
IGNATIUS,Crossover Prog,Spain
IGNATZ,Krautrock,Belgium
IGNEA,Progressive Metal,Ukraine
IGORRR,Experimental/Post Metal,France
IGRA STAKLENIH PERLI,Psychedelic/Space Rock,Yugoslavia
IGZIT-NINE,Jazz Rock/Fusion,Japan
IHLO,Progressive Metal,United Kingdom
IHRE KINDER,Krautrock,Germany
IHSAHN,Tech/Extreme Prog Metal,Norway
III MILĘNIO,Symphonic Prog,Brazil
TH KAN METHOD,Neo-Prog,Italy
IKARUS,Zeuhl,Switzerland
IKARUS,Eclectic Prog,Germany
IKIHEVONEN,Psychedelic/Space Rock,Finland
IKUINEN KAAMOS,Tech/Extreme Prog Metal,Finland
IL BUCO DEL BACO,Rock Progressivo Italiano,Italy
IL PORTO DI VENERE,Rock Progressivo Italiano,Italy
IL TESTAMENTO DEGLI ARCADI,Rock Progressivo Italiano,Italy
ILENKUS,Tech/Extreme Prog Metal,Ireland
ILIAD,Jazz Rock/Fusion,United States
ILIENSES,Prog Folk,Italy
DJORDJ LIJIN,Psychedelic/Space Rock,Yugoslavia
ILL WICKER,Prog Folk,Sweden
ILLŔCHIME QUARTET,Eclectic Prog,Italy
TH LLNESS,Experimental/Post Metal,United States
ILLOGICIST,Tech/Extreme Prog Metal,Italy
ILLUMINAE,Crossover Prog,United Kingdom
ILLUMINATED MINERVA,Progressive Metal,Canada
ILLUMINATI,Tech/Extreme Prog Metal,Romania
ILLUMION,Neo-Prog,Netherlands
ILLUSION,Progressive Metal,United States
ILLUSION,Eclectic Prog,United Kingdom
ILLUSION OF GRAVITY,Neo-Prog,Italy
ILLUSION SUITE,Progressive Metal,Norway
ILLUSIVE LIGHT,Crossover Prog,Germany
ILOUS & DECUYPER,Prog Folk,France
ILUVATAR,Neo-Prog,United States
ILUZJON,Crossover Prog,Poland
ILVCIA,Symphonic Prog,Spain
ILYDAEN,Post Rock/Math rock,Belgium
IMAGERY,Heavy Prog,Brazil
IMAGES,Eclectic Prog,France
IMAGES OF EDEN,Progressive Metal,United States
IMAGIN'ARIA,Heavy Prog,Italy
IMAGINAERIUM,Neo-Prog,United Kingdom
IMAHORITSUNEOYOSHIDATATSUYA,RIO/Avant-Prog,Japan
IMÁN CALIFATO INDEPENDIENTE,Jazz Rock/Fusion,Spain
IMANISSIMO,Psychedelic/Space Rock,Indonesia
BRIA MIG,Prog Folk,United States
IMMANENT,Progressive Metal,France
IMMANU EL,Post Rock/Math rock,Sweden
IMMINENT SONIC DESTRUCTION,Progressive Metal,United States
IMMORTAL ONION,Eclectic Prog,Poland
IMMUNE,Crossover Prog,United Kingdom
IMPACT FUZE,Jazz Rock/Fusion,Russia
IMPERIAL TRIUMPHANT,Tech/Extreme Prog Metal,United States
IMPLOSION,Progressive Metal,Greece
IMPROVED SOUND LIMITED,Krautrock,Germany
IMPULS,Jazz Rock/Fusion,Czech Republic
IMPULSO DE LOS SONIDOS INCONSCIENTES,Heavy Prog,Argentina
IN A NUTSHELL,Psychedelic/Space Rock,Russia
IN ABSTRACKTO,Eclectic Prog,Mexico
IN CONTINUUM,Crossover Prog,United States
IN EACH HAND A CUTLASS,Post Rock/Math rock,Singapore
IN GOWAN RING,Prog Folk,United States
IN GRIEF,Tech/Extreme Prog Metal,Norway
IN HUMAN FORM,Tech/Extreme Prog Metal,United States
IN LIMBO,Crossover Prog,France
IN LINGUA MORTUA,Tech/Extreme Prog Metal,Norway
IN LOVE WITH,RIO/Avant-Prog,France
IN MORPHEUS' ARMS,Progressive Metal,Germany
IN MOURNING,Tech/Extreme Prog Metal,Sweden
IN NOMINE,Neo-Prog,Spain
IN OCEANS,Heavy Prog,United Kingdom
IN SEARCH FOR,Progressive Metal,Belarus
IN SPE,Symphonic Prog,Estonia
IN THE LABYRINTH,Prog Folk,Sweden
IN THE NAME,Progressive Metal,Canada
IN THE PRESENCE OF WOLVES,Heavy Prog,United States
IN THE WAKE OF GIANTS,Post Rock/Math rock,United States
IN THE WOODS...,Experimental/Post Metal,Norway
IN VAIN,Tech/Extreme Prog Metal,Norway
IN ZAIRE,Psychedelic/Space Rock,Italy
IN(OUR)FINITE SPACE,Post Rock/Math rock,Canada
IN-DREAMVIEW,Post Rock/Math rock,United States
IN.OVO,Experimental/Post Metal,Canada
INCANDESCENT SKY,Psychedelic/Space Rock,United States
INCOMING CEREBRAL OVERDRIVE,Experimental/Post Metal,Italy
TH NCREDIBLE STRING BAND,Prog Folk,United Kingdom
L NCREÍBLE FUGA DE TRIÁNGULOS,RIO/Avant-Prog,Argentina
INDACO,Prog Folk,Italy
INDELIBLE,Crossover Prog,Norway
INDEPENDĘNCIA,Progressive Metal,Brazil
INDEX,Symphonic Prog,Brazil
INDEXI,Crossover Prog,Yugoslavia
INDIAN SUMMER,Heavy Prog,United Kingdom
INDIGNU,Post Rock/Math rock,Portugal
INDIGO,Symphonic Prog,Germany
INDIGO,Prog Related,Austria
INDISCIPLINE,Heavy Prog,Canada
INDISCIPLINED LUCY,Neo-Prog,Sweden
INDRICOTHERE,Tech/Extreme Prog Metal,United States
INDUKTI,Experimental/Post Metal,Poland
INES,Neo-Prog,Germany
INFAMIA,Tech/Extreme Prog Metal,Italy
INFANTEPHANT,RIO/Avant-Prog,United States
INFERA BRUO,Tech/Extreme Prog Metal,United States
INFICTIONS,Crossover Prog,United Kingdom
INFINIEN,Eclectic Prog,United States
INFINITE HORIZON,Progressive Metal,Germany
INFINITE MONOPOLY,Crossover Prog,United States
INFINITE ORCHESTRA,Crossover Prog,United States
INFINITE SPECTRUM,Progressive Metal,United States
INFINITE THIRD,Post Rock/Math rock,United States
TH NFINITE TRIP,Psychedelic/Space Rock,United Kingdom
INFINITOME,Symphonic Prog,United States
INFINITY,Symphonic Prog,United States
INFINITY FORMS OF YELLOW REMEMBER,Psychedelic/Space Rock,United Kingdom
INFINITY WINDOW,Progressive Electronic,United States
INFLUENCE X,Progressive Metal,Switzerland
L NFONIE,RIO/Avant-Prog,Canada
INFRINGEMENT,Neo-Prog,Norway
INFRONT,Heavy Prog,Russia
INFUSION KAMACHUI,Crossover Prog,Argentina
INGENIUM,Tech/Extreme Prog Metal,Poland
INGRANAGGI DELLA VALLE,Rock Progressivo Italiano,Italy
INGURGITATING OBLIVION,Tech/Extreme Prog Metal,Germany
INI,Tech/Extreme Prog Metal,Norway
INIOR,Neo-Prog,Italy
INISTEKAR,Eclectic Prog,Canada
INITIAL GRAVITY,Progressive Metal,Argentina
INITIAL MASS,Heavy Prog,United States
INITIAL POINT,Tech/Extreme Prog Metal,United States
INNATE CONCEPT,Progressive Metal,Germany
INNER DRIVE,Jazz Rock/Fusion,Russia
INNER EAR BRIGADE,RIO/Avant-Prog,United States
INNER LIGHT ORCHESTRA,Eclectic Prog,Finland
INNER ODYSSEY,Progressive Metal,Canada
INNER PROSPEKT,Crossover Prog,Italy
INNER QUEST,Progressive Metal,Italy
TH NNER ROAD,Symphonic Prog,United Kingdom
INNER SPACE,Jazz Rock/Fusion,Multi-National
INNERSPACE,Crossover Prog,Canada
INNO,Progressive Metal,Italy
INNOSENSE,Progressive Metal,Greece
INOMATA TAKESHI & SOUND L.T.D.,Psychedelic/Space Rock,Japan
INQUIRE,Symphonic Prog,Germany
INQUISITOR,Tech/Extreme Prog Metal,Lithuania
INSIDE THE SOUND,Progressive Metal,Ukraine
INSIDE//OUTSIDE,RIO/Avant-Prog,United States
INSIDER,Psychedelic/Space Rock,Italy
INSONAR,RIO/Avant-Prog,Italy
INSPIRATIONAL CORNER,Crossover Prog,Austria
INSTANT CURTAIN,Eclectic Prog,Italy
INSTANT DRONE FACTORY,Krautrock,Multi-National
INSTANT FLIGHT,Psychedelic/Space Rock,Multi-National
INSTANT SUPPRESSION,Progressive Metal,Russia
TH NSTITUTE OF MODERN LOVE,Neo-Prog,United Kingdom
INTENSITY,Progressive Metal,Greece
INTENTIONAL TRAINWRECK,Progressive Metal,United States
INTENTIONS,Crossover Prog,Netherlands
INTER ARMA,Experimental/Post Metal,United States
INTERFACE,Eclectic Prog,Japan
INTERFERENCE SARDINES,RIO/Avant-Prog,Canada
INTERGALACTIC TOURING BAND,Crossover Prog,Multi-National
INTERKOSMOS,Psychedelic/Space Rock,Austria
INTERNATIONAL HARVESTER,Psychedelic/Space Rock,Sweden
INTERNATIONAL KARATE,Post Rock/Math rock,Australia
INTERPOSE+,Eclectic Prog,Japan
INTERVALS,Tech/Extreme Prog Metal,Canada
INTHEBACKGROUND,Post Rock/Math rock,United States
INTO ETERNITY,Tech/Extreme Prog Metal,Canada
INTO MY HOUSES,Progressive Metal,Finland
INTO THE GREAT DIVIDE,Progressive Metal,United States
INTO THE MOAT,Tech/Extreme Prog Metal,United States
INTO THE PRESENCE,Crossover Prog,United States
INTONATE,Tech/Extreme Prog Metal,Canada
INTRAVENUS,Jazz Rock/Fusion,Greece
INTROITUS,Neo-Prog,Sweden
INTRONAUT,Experimental/Post Metal,United States
INTROVISIÓN,Heavy Prog,Costa Rica
JAC NTVELD,Symphonic Prog,United States
INUS,RIO/Avant-Prog,United States
INVALIDS,Post Rock/Math rock,United States
INVASIVE SPECIES,Heavy Prog,United States
INVERNADERO,Psychedelic/Space Rock,Chile
INVERTIGO,Neo-Prog,Germany
TH NVINCIBLE CZARS,Eclectic Prog,United States
INVISIBLE,Symphonic Prog,Argentina
TH NVISIBLE BAND!,Psychedelic/Space Rock,United Kingdom
INVISIBLE OPERA COMPANY OF TIBET (BRAZIL),Psychedelic/Space Rock,Brazil
TH NVISIBLE PRESENCE,Crossover Prog,Multi-National
INVISIGOTH,Neo-Prog,United States
INVOLVED,Progressive Electronic,United States
IO,Experimental/Post Metal,United Kingdom
IO EARTH,Crossover Prog,United Kingdom
IOMAIR,Progressive Metal,Canada
ION,Crossover Prog,United Kingdom
ION,Experimental/Post Metal,United States
ION DISSONANCE,Tech/Extreme Prog Metal,United States
ION QUEST,Psychedelic/Space Rock,United States
IONA,Prog Folk,United Kingdom
IOSEB,Post Rock/Math rock,Sweden
IOTUNN,Tech/Extreme Prog Metal,Denmark
IQ,Neo-Prog,United Kingdom
L RA DE DIOS,Psychedelic/Space Rock,Peru
L RA DEL BACCANO,Heavy Prog,Italy
IRAKLIS,Prog Folk,Greece
IREPRESS,Experimental/Post Metal,United States
IRIS,Neo-Prog,France
IRIS DIVINE,Progressive Metal,United States
IRISH COFFEE,Heavy Prog,Belgium
IRMIN'S WAY,Krautrock,Multi-National
IRON BUTTERFLY,Proto-Prog,United States
IRON DUKE,Symphonic Prog,Denmark
IRON KIM STYLE,Jazz Rock/Fusion,United States
IRON MAIDEN,Prog Related,United Kingdom
IRON THRONES,Tech/Extreme Prog Metal,United States
IRONWOOD,Experimental/Post Metal,Australia
IRREVERSIBLE,Experimental/Post Metal,United States
IRRGARTEN,Crossover Prog,Canada
JOH RVINE,Jazz Rock/Fusion,United Kingdom
ISBJÖRG,Neo-Prog,Denmark
ISILDURS BANE,Symphonic Prog,Sweden
ISIS,Experimental/Post Metal,United States
ISKANDER,Eclectic Prog,Germany
ISLAND,Eclectic Prog,Switzerland
ISLAND,Tech/Extreme Prog Metal,Germany
ISLANDS,Crossover Prog,Canada
ISLE OF THE CROSS,Tech/Extreme Prog Metal,United States
ISOBAR,Eclectic Prog,United States
ISOLATION,Prog Folk,United Kingdom
ISOPODA,Symphonic Prog,Belgium
ISOS,Crossover Prog,Canada
TH SOSCELES PROJECT,Tech/Extreme Prog Metal,Canada
ISOTOPE,Jazz Rock/Fusion,United Kingdom
ISOTOPES,Tech/Extreme Prog Metal,United States
ISPROJECT,Rock Progressivo Italiano,Italy
ISTHMUS,Experimental/Post Metal,United States
ISZIL,Crossover Prog,Chile
IT,Neo-Prog,United Kingdom
IT,Eclectic Prog,United States
IT BITES,Crossover Prog,United Kingdom
IT'S A BEAUTIFUL DAY,Proto-Prog,United States
IT'S NOT NIGHT: IT'S SPACE,Psychedelic/Space Rock,United States
IT'S THE END,Eclectic Prog,Norway
IT'S.TRUE.MENTALITY,Progressive Metal,Poland
ITERUM NATA,Prog Folk,Finland
ITHACA,Prog Folk,United Kingdom
ITOIZ,Prog Folk,Spain
ITZIAR,Prog Folk,Spain
IV LUNA,Progressive Metal,Italy
IVANHOE,Progressive Metal,Germany
VELISLA VANOV,Neo-Prog,Bulgaria
IVERSEN,Progressive Electronic,Norway
IVIRON,Eclectic Prog,Germany
IVOR AXEGLOVITCH,RIO/Avant-Prog,Denmark
IVORY,Psychedelic/Space Rock,Germany
IVORY TOWER,Progressive Metal,Germany
IWRESTLEDABEARONCE,Tech/Extreme Prog Metal,United States
IX,Eclectic Prog,Venezuela
IXION,Neo-Prog,Netherlands
IXT ADUX,Eclectic Prog,United States
IXTHULUH,Psychedelic/Space Rock,Austria
IZ,Heavy Prog,United States
IZAH,Experimental/Post Metal,Netherlands
IZUKAITZ,Prog Folk,Spain
IZVIR,Jazz Rock/Fusion,Yugoslavia
IZZ,Symphonic Prog,United States