Quick verdict
Use Resend for a clean developer experience. Use SendGrid when you need mature enterprise email controls.
Best for
- Resend: developer-led SaaS and fast setup
- SendGrid: larger email operations and compliance-heavy teams
Watch out for
- Authenticate domains before launch
- Separate product email from marketing blasts
Recommended stack
Resend or SendGrid
Loops for lifecycle email
Supabase auth
SilkRouter alerts
Where SilkRouter fits
Your hosting, CRM, email, and automation tools should not force one model provider forever. SilkRouter gives AI startups one API for supported AI models, so routing and spend visibility can live in one place.
One API For All AI Models