Resend — Transactional Email API for AI-Generated Notifications

Pros

• –React Email integration allows templating with full component model — far superior to HTML string templates
• –Developer experience is best-in-class: SDK, clear docs, instant domain verification
• –Deliverability is high — built on SES infrastructure with smart sending optimizations
• –Batch sending API handles bulk sends without per-email API call overhead

Cons

• –No A/B testing built in — requires external orchestration for split testing subject lines
• –Free tier limited to 100 emails/day — useful for development only
• –Analytics dashboard lacks click-map and time-of-read insights available in Sendgrid
• –No native scheduling — timed send requires queue infrastructure