KNOCK: INFRASTRUCTURE TO SEND PRODUCT MESSAGING

Summary from the TLDR Web Dev newsletter

Building, managing, and scaling cross-channel notifications gets complicated fast. Knock [10] is a single API for managing messages across email, in-app, Slack, push, and SMS. Plus, a visual workflow builder and template editor anyone can use. All with observability, like you built it in-house. Send 10k notifications per month for free [10].