Implementations for recovering e-commerce orders are described herein. An e-commerce order is submitted to an order processing system, by an order check-out module of an online transaction system. The e-commerce order includes order information that is provided to the order check-out module by a client device. The check-out module determines that the order processing is delayed or failed and, based at least on a status of the order processing being delayed or failed, initiates an order recovery action to be performed by an order recovery engine. Once the order recovery action is initiated, the order check-out module is made available to handle a new order.