- In Reverent Fear
- In Ruin
- In Ruins (US doom/death metal band)
- In Schwarz
- In Slaughter Natives
- In Slumber
- In Solitude (Swedish heavy metal band from Uppsala)
- In Somnis
- In Strict Confidence
- In Tall Buildings
- In Tenebris
- In Tha Umbra
- In The Burial
- In the Canopy
- In The City
- In The Cut
- In the Face of War
- In the Midst of Lions
- In the Nursery
- In the Pink
- In the Presence of Wolves
- In the Silence
- In the Silence (Progressive Rock / Atmospheric Metal)
- In the Valley Below
- In the Woods…
- in theory
- In This Moment
- In This Moment feat. Halford, Rob
- In This Moment feat. Smith, Brent
- In Thy Dreams
- In Torment (Brazilian Brutal Death Metal Band)
- In tormentata quiete
- In Trance 95
- In Tua Nua
- In Tune (instrumental covers on guitar)
- In Twilight's Embrace
- In Tyrannos
- In Vain (Death Metal / Progressive / Black Metal)
- In Vain (Spanish thrash/power metal band)
- In Virgo
- In Waves
- In Your Face (United States hardcore punk)
- In Zaire
- In-Flight Safety
- In-Fused (industrial)
- In-Moment, The
- In-Mood feat. Juliette (project)
- In-Quest (Belgian death metal)
- In-Sane
- In‐Grid (Italian dance/pop singer)
- In‐Grid feat. Pochill
- In:Aviate
- in:tides
- IN.SI.DIA
- In/Humanity
- IN2IT
- Ina-Ich
- Inaba, Koshi
- Inactive Messiah
- Inadaptats
- Inade
- Inai, Keiji
- Inamere
- Inanimate Existence
- INANNA (Swedish industrial artist)
- Inazuma
- Inborn Suffering
- Inbound
- Inbreds, The (Canadian Indie Rock band.)
- Inbreeding Rednecks (Death Metal)
- INC (Spanish Band)
- inc. (American Producer Duo)
- inc. no world
- Inc., Art
- Inca Son
- Incantation (American death metal band)
- Incantation (plays traditional tribal and other South American music)
- Incantation (electronic act)
- Incarnate (Dutch thrash metal/hardcore band)
- incarNations
- Incarnations (Incarnations - a band by Daniel Collás, Bart Davenport & Quinn Luke)
- Incarnia
- Incendiary (NY hardcore band)
- Incense (Dutch 1990/2000s indie pop/rock group)
- İncesaz
- Inchiuvatu
- Inchtabokatables, The
- Incinerating Prophecies
- Incinerator (Netherlands old school thrashmetal and oldschool deathmetal)
- Incise
