Courier has raised a $10.1M Series A funding round led by Bessemer Venture Partners, with participation from numerous top investors including Matrix Partners, Twilio, Slack, Y Combinator, and many great angel investors. The company's seed round was previously unannounced at $2.3M, raising the total funding to date to over $12.4M. Courier aims to build what it believes will be the sensible default for every software product's communication infrastructure, with plans to invest in new features such as delayed and scheduled messages, message batching, and UI libraries for notification centers and in-app notifications. The company has grown from a team of four to 11 engineers and is now hiring for more roles. With its new funding round, Courier will focus on scaling its team to pursue this vision and make it a reality.