Overview
Courier and SendGrid serve fundamentally different purposes. SendGrid sends emails directly. Courier orchestrates notifications across channels, often using SendGrid as one of its delivery providers. For our take on each, see our Courier comparison and SendGrid comparison.
Different Layers of the Stack
Courier sits above email providers as an orchestration layer. It routes notifications to the right channel (email, push, SMS) through the right provider. SendGrid is an email provider — it actually delivers the emails. You might use both: Courier for routing, SendGrid for email delivery.
When You Just Need Email
If email is your only channel, SendGrid is simpler and cheaper. One integration, direct delivery, marketing features included. Adding Courier for email-only adds complexity and cost without clear benefit.
The Sequenzy Alternative
For SaaS founders wanting transactional email and marketing campaigns with Stripe integration, Sequenzy offers a unified SaaS email platform at $49/month.