At Vaporware, we're huge fans of Courier. We're constantly developing MVPs and iterating quickly, and a full-fledged Notification system where developers just send data events (or better yet, just use segment events) and product managers can quickly iterate on design and content for email and SMS channels has been huge. Doing all of that in 30 minutes takes us from 0 to hero for our startups.
Better yet? B2B SaaS companies love it since we can do white-labeling through their branding, complex batching or weekly digests through their automations, and even in-app notifications/preference management which took weeks to build from scratch.
Oh, and it scales. Swap in providers at-will to improve deliverability or get better pricing. It's 100% in our toolbox and isn't going away any time soon. This is a "duh" product for any development team.
