A decade ago, the first SMS was sent in the UK, revolutionizing personal communication. This led to asynchronous messaging via mobile phones, which grew exponentially with interoperability between carriers in 2002. Today, 16 million text messages are sent every minute, totaling 23 billion per day. The emergence of Application-to-Person (A2P) Messaging has seen growth, as businesses use messaging for customer updates and notifications, recognizing its value for differentiating customer experience. Carriers have been working on adding new products to handle A2P messages at higher volumes with lower filtering. Twilio was one of the first companies to provide text-messaging over long codes through a simple-to-use API, launching short codes in 2011 and picture messaging in 2013. The company is now working closely with carriers to enable access for its customers as the ecosystem makes the shift from P2P to A2P messaging, which will be a year of transition in 2019.