I
| I Killed The Last | Metalcore | Пловдив | 2006 |
| I-Band | Hard Rock/Blues Rock | София | 2005 |
| I.R.B.69 | Blues Rock/Hard Rock | Стара Загора | 2012 |
| I.V.R. Project | Thrash Metal/Electronic Metal | Пловдив | 2014 |
| Ignore | Anarcho-Punk | Варна | 1993 |
| Ignore The Hate | Heavy Metal | Шумен | 2012 |
| Iguanna | Alternative Rock | Варна | 2017 |
| Il Pasaro | Thrash Metal | Варна | 2006 |
| Illusion | Dark Wave | София | 1994 |
| Imbecile | Alternative Metal | София | 2019 |
| Immortal Discordia | Death Metal | Шумен | 1992 |
| Impade | Hard Rock/Heavy Metal | София | 2011 |
| Impale Jesus | Doom Death Metal | Пловдив | 1996 |
| Impenitence | Death Metal | София | 2007 |
| Imperial Majesty | Melodic Black Metal | Плевен | 1997 |
| Imperium Infernal | Black Metal | Варна | 2006 |
| In Amber | Hard Rock/AOR | Монтана | 2017 |
| In Darkness | Heavy Metal | Търговище | 2011 |
| In Dying Moments | Metalcore | Шумен | 2010 |
| In Somnus | Gothic/Doom Metal | София | 1997 |
| In Thy Kingdom | Atmospheric Gothic Doom Metal | Благоевград | 2003 |
| Incadus | Gothic Metal | Добрич | 2002 |
| Incara | Thrash/Groove Metal | София | 2021 |
| Incarnation | Death Metal | София | 1992 |
| Incestus | Death Metal | Севлиево | 2014 |
| Inconvenients | Punk Rock/Ska | Силистра | 2019 |
| Incriminal | Hardcore | София | 1994 |
| Independent | Punk Rock | Варна | 2009 |
| Indignity | Hardcore | Варна | 1995 |
| Infernal Creatures | Black Metal | Враца | 2007 |
| Infernal Lord | Black Metal | Поморие | 2006 |
| Infernal Sickness | Brutal Death Metal/Grind/Noise | Денвър, Колорадо (САЩ) | 2023 |
| Inffantta | Progressive/Folk Rock | Шумен | 2012 |
| Inflict | Thrash/Groove Metal | Пловдив | 2014 |
| Inner Strive | Symphonic/Power Metal | София | 2020 |
| Innerglow | Electro Rock/Pop Rock | София | 2017 |
| Inrage | Heavy Metal | София | 2009 |
| Insane | Groove Metal | Русе | 2015 |
| Insanir | Black Metal | Бургас | 2022 |
| Insanity Redefined | Melodic Heavy Metal | София | 2013 |
| InsArtTure | Melodic Metal | София | 2005 |
| Insight | Progressive Rock | София | 2007 |
| Insmouth | Crossover | Велико Търново | 1992 |
| Inspell | Symphonic Black Metal | Благоевград | 2003 |
| Institute 22 | Post Punk | Павликени | 2024 |
| Intelligent Music Project | AOR | София | 2012 |
| Interval | Melodic Hard Rock/AOR | Златица | 2020 |
| Intoxicated Animals | Groove Metal | София | 2024 |
| Invidia | Black Metal | Стара Загора | 2010 |
| Invisible Dreams | Alternative Metal | Сливен/София | 2001 |
| InXile | Metalcore | София | 2006 |
| Ira Deum | Thrash/Death Metal | Шумен | 1991 |
| Irony | Progressive Metal | Ямбол | 2003 |
| It Is Good That We Never Met | Metalcore | София | 2015 |
| ITSI | Experimental Death Metal | София | 2002 |
| Iudicium | Black Metal | Дупница | 1995 |
| Ivo Icehard | Power Metal | София | 2019 |
| Ivory Twilight | Symphonic Power Metal/Alternative Metal | Пловдив | 2003 |
| IYI | Black Metal | Бургас/Стара Загора | 2012 |
| Izida | Heavy Metal | с.Козар Белене | 1989 |
| Izkoplyak | Brutal Death Metal/Grindcore | Враца | 2022 |