Courier is the fastest way to add multi-channel notifications to your web, desktop, or mobile app.With one API call, you can reach your users on any channel – email, SMS, push, chat, and more. Trusted by innovative startups like Lattice, LaunchDarkly, LTSE, Bluecrew, and Blissfully. Backed by Y Combinator, Bessemer Venture Partners, Matrix Partners, Twilio, and Slack Fund.
"By moving to Courier to send notifications, we've been able to eliminate 120,000 lines of code. That's logic, templates, and other third-party API integrations we no longer have to maintain."




Read Courier Reviews, Testimonials & Customer References from 10 real Courier customers.
Browse Courier Case Studies, Customer Success Stories, & Customer References from 5 businesses that use Courier.