A system is described for serving targeted advertisements over mobile messaging services. The system may include a processor, a memory and an interface. The memory may store a request for an advertisement and an advertisement. The interface may be operatively connected to the memory and the processor and may communicate with mobile network operators. The mobile network operators may be capable of providing mobile services users. The processor may be operatively connected to the interface and the memory and may receive a request for an advertisement from a mobile network operator via the interface. The request for an advertisement may be related to a mobile message sent from a first user to a second user via the mobile network operator. The processor may retrieve an advertisement based on the request for an advertisement. The processor may communicate the advertisement to the mobile network operator via the interface.