Knock has multi channel support for send in-app, email or slack notifications with smart batching with a simple API. It's developer first approach provides a seperate development and production environment that makes it easy to test and configure messages which aligns we with best practices. Review collected by and hosted on G2.com.
The designer provides a nice way create templates for email, but has limited flexibility on format requiring you to switch to code mode to make further edits. Review collected by and hosted on G2.com.
