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. To understand transactional email best practices, check out our comprehensive guide. With only 9 Trustpilot reviews, the feedback is polarized—developers love the easy setup and inbox placement, but several report sudden account suspensions with slow or nonexistent support response, which can break critical transactional flows like signup and password reset for entire products.
But most growing companies eventually need marketing email too. When that happens, you have two choices:
Keep Resend + add marketing tool - Two bills, two dashboards, sync subscriber data between them
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. Native Stripe integration 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. See our Resend comparison for detailed feature breakdown.
If deliverability is everything: Postmark
Postmark's exceptional deliverability comes from their strict customer vetting. They'll reject you if your use case is questionable. This keeps their IP reputation pristine. Read our email deliverability guide to understand why this matters.
If your app absolutely depends on emails arriving (password resets, 2FA codes, critical notifications), Postmark's strictness is a feature, not a bug. Our SPF checker and DKIM checker tools can help you optimize your email infrastructure.
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. Check our SendGrid comparison to see how it stacks up today.
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.
If you need multi-channel notifications: Knock or Novu
If email is just one part of your notification system, check out Knock or Novu. Both orchestrate email, push, SMS, and in-app from a single API. You can even use Resend as the email backend inside Knock's workflow engine—best of both worlds. Novu is open-source if that matters.
If privacy matters: MailPace
For EU-based teams or anyone building privacy-first products, MailPace offers Resend-like simplicity with EU-hosted infrastructure and no tracking by default. Fully GDPR-compliant without extra configuration.
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)
MailerSend: $28/month (modern transactional + SMS)
Sequenzy: $49/month for 120k emails (unlimited 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. See our pricing page for more details.
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. Use our email warmup calculator to plan your transition, and read our guide to email marketing tools for SaaS to find your best fit.