- In Strict Confidence
- In Sylva (Canadian prog group)
- In Tall Buildings
- In the Act of Violence (Canadian)
- In the Arena (Members of Cry of the Afflicted, Secret & Whisper)
- in the beyond (Active in UK 2019-Current)
- In The CAN
- In the Canopy
- In The City
- In the Face of War
- In the Midst of Lions
- In the Nursery
- In the Presence of Wolves
- In the Silence
- In the Silence (Progressive Rock / Atmospheric Metal)
- In the Valley Below
- In the Woods… (Norwegian black metal (a.k.a. I.t.W.))
- in theory
- In Theory...
- In This Moment
- In This Moment feat. Charnas, Spencer
- In This Moment feat. Halford, Rob
- In This Moment feat. Smith, Brent
- In This Moment featuring Brink, Maria, Hale, Lzzy and Momsen, Taylor
- In This Moment featuring Cotela, Joe
- In Thorns
- 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 (Polish Melodic Death Metal Band)
- In Vain (Norwegian death metal / progressive / black metal)
- In Vain (Spanish thrash/power metal band)
- In Victory
- In Virgo
- In Vivid Clarity
- In Whispers
- In Your Distress
- In Your Grave
- In Zaire
- In-D (Belgian 1980s New Beat project)
- in-d (Japanese hiphop)
- In-Dex (80's House Music duo)
- In-Existence (Dutch rock and metal band)
- In-Flight Safety
- In-Fused (industrial)
- In-Moment, The
- In-Mood feat. Juliette (project)
- In-Quest (Belgian death metal)
- In-Sane
- In‐Dex (dance‐pop/freestyle duo)
- In‐Grid (Italian dance/pop singer)
- In, Los
- In:Aviate
- in:tides
- In/Humanity
- IN2IT
- In2Nation
- Ina-Ich
- Inaba, Koshi
- Inactive Messiah
- Inadaptats
- Inagaki, Jiro & Soul Media
- Inagaki, Junichi
- Inai, Keiji
- Inai, Keiji
- Inaizumi, Lyn (Japanese jazz/soul singer)
- Inanimate Existence (Bay Area Techincal Death Metal)
- inaud1bl3
- Inayah
- Inayat, Omer (Pakistani singer)
- inbalance (Californian pop-punk band)
- Inborn Suffering
- Inbound
- Inbred Knucklehead (hardcore/country/ska band from Roma/California/Sweden)
- Inbreds, The (Canadian Indie Rock band.)
- INC (Spanish Band)
- inc. (American Producer Duo)
- inc. no world
- Inc., Art
- Inc., Polar
- 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)
- Incase We Crash (Pop Punk Band)