| getit | Maker | Status | Projects | Rating | Lang | Years | Additional Comments |
| - | Mad Doctorz | Active | 1 Demo | 48% | en | 2002 | - |
| - | Mad Elks | ? | 1 Demo | 93% | - | 1993 | - |
| - | Mad Monks | ? | 1 Demo | 63% | - | 1988 | - |
 | Mad Onion URL (formerly called Future Mark Corporation) | Active | 2 Demos, 1 Reference | 96% | en | 1999-2001 | Well known for their fantastic benchmark series 3D Mark. |
| - | Mad Virgin | Active | 1 Game, 1 Demo | 54% | en | 1995-2001 | - |
| - | MadBrain | Active | 1 Demo | 66% | en | 2001 | - |
| - | Madwizards | ? | 25 Demos, 1 Disk | 70% | - | 1997-2003? | - |
| Magic Bytes URL (now called Fun + Magic) | Dead | 21 Games, 1 Demo, 1 Reference | 64% | de,en | 1987-1996? | German software company. |
| Magic Dreams URL | Active | 3 Demos | 73% | de,en | 2000-2002 | Demo group. |
| - | Magical Wonder Band | ? | 2 Demos | - | - | 1997? | - |
| - | Magician 42 | ? | 1 Demo | 80% | - | 1987 | - |
| - | Magnetic Fields | ? | 6 Demos | 72% | - | 1989-1991? | - |
| - | Magnificent Force | ? | 2 Demos | 73% | - | 1988-1989 | - |
| - | Mahoney & Kaktus | ? | 1 Demo | 72% | - | 1989 | - |
| - | Mahony & Kaktus | ? | 1 Demo | 78% | - | 1991 | - |
| Mainloop URL | Active | 13 Demos | 70% | en | 1999-2003 | Demo group. |
| - | Majic 12 | ? | 3 Demos, 2 Disks | 71% | - | 1991-1996? | - |
| - | Makheim | Active | 1 Demo | 47% | en | 2003 | - |
| - | Malmis | Active | 1 Demo | 44% | en | 2002 | - |
| Mandarine URL | Active | 4 Demos, 1 Website | 71% | fr,en | 2000-2003? | Demo group and creators of the famous Pouet-net. |
| Mandel Bros. URL | Active | 1 Demo | 70% | en | 2000 | Demo goup. |
| Mandula URL | Active | 5 Demos | 76% | en | 1996-2001 | - |
| Mangoo URL | Active | 1 Demo | 72% | en | 2003 | Demo group. |
| - | Manitou | ? | 1 Demo | 75% | - | 1993 | - |
| Mankind URL | Active | 14 Demos | 78% | fr,en | 1994-2003 | French demo group. |
| - | ManTra | Active | 1 Demo, 1 Module | 80% | en | 1997? | - |
| - | Marcel | Active | 1 Demo | 80% | en | 2001 | - |
| - | Mark | ? | 2 Savedisks, 1 Demo | 90% | - | 1989-1998 | - |
| Marshals URL | Active | 19 Demos | 63% | cz,en | 2000-2003 | Active international demo group. |
| Marsmellow URL | Active | 1 Demo | 79% | en | 2003 | Demo group. |
| - | Masque | ? | 1 Demo | - | - | 1997 | - |
| Massive Development URL | Active | 1 Demo | 94% | de,en | 2003 | Developers of the AquaMark Benchmark and the PC games Aquanox 1+2. |
| - | Massive Unlimited | Active | 1 Demo | 28% | en | 2003 | - |
| - | Massive | ? | 1 Demo | 71% | - | 1995 | - |
| - | Matrix | Active | 2 Demos | - | - | 1998 | - |
| - | Mature Furk | Active | 3 Demos | 93% | en | 1999-2001 | Think it's a fake (=Futuremark Corporation!!!). Nevertheless they make excellent demos! |
| - | Maxter | Active | 3 Demos | 42% | en | 2001 | - |
| - | MCD | ? | 1 Demo | - | - | 1997 | - |
| MDR URL | Active | 2 Demos | 64% | en | 2001-2002 | Demo group. |
| - | Mean Machine | ? | 1 Demo | 75% | - | ? | - |
| - | Medieval | Active | 3 Demos | 74% | se,en | 2000-2002 | - |
| - | Mega Watts | ? | 1 Demo | 76% | - | ? | - |
| - | Megadeth | ? | 1 Demo | 7% | - | ? | - |
| - | Megaforce | ? | 1 Demo | 64% | - | ? | - |
| - | Megahawks | ? | 2 Demos | 61% | - | 2002? | - |
| - | MeinRamiSZugrOSs | Active | 1 Demo | 43% | en | 2002 | - |
| - | Mekka Design | ? | 1 Demo | 73% | - | 1994 | - |
| - | Mellow Chips | Active | 4 Games, 5 Demos | 67% | - | 1994-1998? | - |
| - | Mellow | ? | 1 Demo, 1 Disk | 69% | - | 1995? | - |
| Melon Dezign URL | Active | 2 Games, 31 Demos | 65% | en | 1991-2003? | Funny demo group. |
| getit | Maker | Status | Projects | Rating | Lang | Years | Additional Comments |
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