A device implementing a peer transaction system may include at least one processor configured to receive, within a messaging application, a request to send a transaction amount from a first user to a second user. The at least one processor may be further configured to transmit, to a mobile transaction system, a request to transfer the transaction amount from a first debit account of the first user to a second debit account of the second user. The at least one processor may be further configured to receive, from the mobile transaction system, a confirmation that the transaction amount has been transferred from the first user to the second user. The at least one processor may be further configured to transmit, via the messaging application, a message to the second user that indicates that the transaction amount has been sent from the first user to the second user.