[troygoode]

Great article. All of this complexity is the reason I started Courier (YC S19) [0], which we just launched on HN [1] a few days ago. :-)

We take the approach of essentially offering an abstraction layer that lets you route to one or more channels based on data related to the notification event instead of having to hardcode the integration at the callsite. This has the added benefit of also letting you pull the template abstraction into the same space (so you don't go crazy manually maintaining HTML templates for email, plain text for SMS, BlockKit for Slack, etc. etc.)

FYI we support integrations for nearly all of the channels mentioned here: email (via SMTP, SendGrid, SES, and others), Discord, SMS (via Twilio and others), web push, WhatsApp (via Twilio WhatsApp), Slack, & PagerDuty. And many others...

[0]: https://www.courier.com/

[1]: https://news.ycombinator.com/item?id=30527757