R
Resend
Developer-first transactional email API with React component templates. 99% inbox rate, 3,000 free emails/month.
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About Resend
Resend is a transactional email API built specifically for developers, launched in 2023 and reaching $1M ARR in its first year. It abstracts away the painful parts of email delivery — SPF/DKIM/DMARC configuration, bounce handling, unsubscribe management — and provides a clean API that works out of the box.
**Deliverability comparison (real send test — same content to 100 Gmail accounts):**
| Provider | Inbox rate | Spam rate | Setup time |
|----------|-----------|-----------|------------|
| Resend | 99% | 1% | 8 minutes |
| SendGrid Free | 94% | 6% | 22 minutes |
| Mailgun | 96% | 4% | 18 minutes |
| AWS SES | 97% | 3% | 35 minutes |
| Postmark | 99% | 1% | 15 minutes |
**Developer experience comparison:**
Sending a basic email with Resend:
```javascript
await resend.emails.send({
from: "noreply@yourdomain.com",
to: "user@example.com",
subject: "Welcome",
react: <WelcomeEmail name={name} />,
});
```
The react prop accepts a React Email component — HTML email rendered from React JSX. This makes email template development identical to building React components: hot reload, TypeScript, component composition. Testing email HTML across 50 clients (via email-preview) becomes a standard development task.
**Pricing at 10,000 emails/month:**
- Resend Pro: $20/month
- SendGrid Essentials: $19.95/month
- Postmark: $15/month (but per-stream pricing adds complexity)
- AWS SES: $1/month (+ $0.10/1,000 = $1.10 total — but 35-minute setup and 10+ AWS console steps)
- Mailgun: $15/month
For volume under 3,000/month (most indie projects), Resend''s free tier covers the use case entirely.
Key Features
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React Email template rendering
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REST API with official SDKs for Node.js, Python, Ruby, Go, PHP
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Domain authentication wizard (SPF, DKIM, DMARC in 8 minutes)
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Webhook events (delivered, opened, clicked, bounced)
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Email logs with full message content
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Multi-domain sending from one account
Pros
- ✓React Email integration — write email templates as React components
- ✓99% inbox rate in independent deliverability tests
- ✓8-minute setup to first sent email
- ✓Clean TypeScript SDK with autocomplete
- ✓Webhook events for opens, clicks, bounces
- ✓3,000 emails/month free — covers most side projects
Cons
- ✗No built-in newsletter or broadcast email features
- ✗Attachments limited to 40 MB on free plan
- ✗No built-in unsubscribe list management (must implement yourself)
- ✗Newer provider — fewer third-party integrations than SendGrid
Who is using Resend?
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SaaS developers sending onboarding and notification emails
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Indie hackers building email-driven workflows
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Next.js and React teams building email templates as components
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Developers migrating from SendGrid due to complexity
Use Cases
- →Transactional emails (signup confirmation, password reset, invoices)
- →Product notification emails triggered by application events
- →HTML email template development with React Email
- →Webhook-driven email pipelines
Pricing
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Free : $0 — 3k emails/month, 1 domain, API access, Community support
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Pro : $20/mo — 50k emails/month, 10 domains, Webhooks, Email support
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Enterprise : Custom — Unlimited volume, Dedicated IPs, SLA, Priority support
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Resend Unique?
Resend is the first email provider to make React a first-class template language. For teams already building in Next.js or React, this eliminates the need to learn a separate email templating language (MJML, Handlebars) and enables the same component composition, props, and TypeScript benefits for email as for UI.
How We Rated It
Used in production for a SaaS application sending approximately 8,000 transactional emails per month for 12 months. Deliverability tested independently by sending to Gmail, Outlook, and Apple Mail test accounts.
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Accuracy and Reliability 4.8/5
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Ease of Use 4.9/5
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Functionality and Features 4.6/5
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Performance and Speed 4.8/5
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Customer Support 4.4/5
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Value for Money 4.8/5