The real question: Do you need more than transactional?

Resend is excellent at what it does. If you only need to send password resets, order confirmations, and notifications, there's arguably nothing better. The DX is unmatched.

But most growing companies eventually need marketing email too. When that happens, you have two choices:

1. Keep Resend + add marketing tool - Two bills, two dashboards, sync subscriber data between them
2. Switch to unified platform - One tool for everything, simpler to manage

Here's when each path makes sense:

If you want one platform for everything: Sequenzy

Sequenzy combines transactional and marketing email with AI content generation. You describe what you want ("a 5-email onboarding sequence for a SaaS product") and it generates the emails. Stripe syncs customer data automatically.

The tradeoff: Resend's DX is still better for pure transactional. React Email templates are more polished. But if you're tired of juggling two tools, Sequenzy simplifies things.

If deliverability is everything: Postmark

Postmark's deliverability is exceptional because they're strict about who they let on the platform. They'll reject you if your use case is questionable. This keeps their IP reputation clean.

If your app absolutely depends on emails arriving (password resets, 2FA codes, critical notifications), Postmark's strictness is a feature, not a bug.

If you need scale: SendGrid

SendGrid isn't sexy, but it handles scale. Twilio backing means it's not going anywhere. The interface feels dated compared to Resend, but if you're sending millions of emails, it just works.

If you want the cheapest option: Amazon SES

At $0.10 per 1,000 emails, nothing beats SES on price at scale. But you get zero help -no templates, no dashboard, no deliverability guidance. You're on your own. Only choose this if you have engineering resources to build around it.

The pricing reality

For 50,000 emails/month:

• Resend: $20/month (transactional only)
• Postmark: $50/month (transactional only, best deliverability)
• SendGrid: $19.95/month (transactional + basic marketing)
• Amazon SES: $5/month (DIY everything)
• Sequenzy: $49/month for 10k subscribers (transactional + marketing + AI)

The comparison isn't apples-to-apples. Resend and Postmark are transactional only. Sequenzy and Loops include marketing. SES requires DIY work. Factor in what you'd pay for two tools when comparing.

When Resend is still the right choice

Resend wins if:

• You only need transactional email (seriously, only)
• You're building with React and love React Email
• Developer experience matters more than anything else
• You're happy using a separate tool for marketing later

Don't switch just because you might need marketing someday. Resend + separate marketing tool is a valid architecture. But if you're already managing two tools and it's painful, consolidating makes sense.