- M-Birr
- Macedonian
- Macedonian Denar
- Maestro
- Malagasy Ariary
- Malay
- Malaysian Ringgit
- Maltese
- Mansion Group Casinos
- Marikit Holdings Ltd
- Marketplay LTD
- MasterCard
- mBankomat
- mBet Solutions N.V. Casinos
- Megafon
- Megafone
- Megapari Ltd.
- Merkur Gaming
- Mexican Peso
- Mexican Spanish
- Microgaming
- MiFinity
- Mirage Corporation N.V.
- MobiCash
- Mobile Bonus
- Mobile Commerce
- Mobile Technology Marketing Limited (MTM Corp)
- Moldovan Leu
- Monero
- Moneta
- Moneta.ru
- Money Global
- Money Orders
- MoneySafe
- Mongolian
- Moroccan Dirham
- Morris Mohawk Gaming Group
- Mountberg B.V.
- Mozambican Metical
- MT SecureTrade Limited
- MTC
- MTS
- MuchBetter
- Multibanco
- MyBux