Next.js + Resend
for SaaS founders.
Next.js + Resend with React Email is the modern transactional email stack — write emails in React, send via API. For SaaS founders: Pair with lifecycle email tool (Loops or Customer.io) for non-transactional sends.
This stack, applied to you.
For SaaS founders, Next.js + Resend handles transactional email cleanly. Pair with Loops or Customer.io for non-transactional (lifecycle, marketing). The split is intentional: Resend for emails triggered by user actions (auth, notifications, invoices); Loops/Customer.io for emails triggered by user state (onboarding sequences, retention campaigns).
SaaS founders-specific gotchas
- Don't mix transactional and broadcast on the same Resend domain
- Resend's API has rate limits — batch carefully for bulk sends
- Templates in React Email are versioned; templates in Loops are not
- Deliverability requires DKIM, SPF, DMARC setup
- Email logs are part of your audit trail at higher tiers
A SaaS uses Resend for all in-product emails (welcome, invoices, comments, mentions) and Customer.io for lifecycle (trial reminders, onboarding sequences, dormant re-engagement). Each tool does what it's good at.
Common SaaS founders questions.
Can we do everything with Resend?
Technically yes, but the tooling for lifecycle email is far better in Loops/Customer.io.
What about email warmup?
Resend doesn't require warmup for new domains. Some volume thresholds matter; check their docs.
We've shipped this.
We use this on this site and most clients. If you're a SaaS founders shipping on this stack, we can save you a quarter.
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