Many startups build chat capabilities into their products. For example, most marketplace, community, and social products provide users with a way to communicate with one another. At Copilot, we make client portal software, and an important use case for us is to let service businesses communicate with clients and vice versa using our web-based Messaging App. In the first iteration of the service, when users sent messages in our web app, we sent out messaging email notifications to inform recipie