Resend
Resend is an email platform built for developers to deliver transactional and marketing emails that reliably reach inboxes.
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Resend Overview
Key Features & Capabilities
Integrate in minutes using a clean REST API, SMTP, and official SDKs for Node.js, Python, Ruby, Go, Java, .NET, PHP, and Rust. Send, track, and manage emails programmatically with predictable responses and strong language coverage.
Write and design emails using a delightful editor or build reusable templates with React Email components. Avoid brittle table-based HTML while enabling developers and non-technical teammates to collaborate on content.
Improve inbox placement with regional sending, proactive blocklist tracking, managed dedicated IPs (auto-warm & autoscale), BIMI guidance, and DKIM/SPF/DMARC verification. Monitor domains and DNS to prevent regressions.
Gain full visibility with straightforward analytics and detailed event logs. Use Test Mode to simulate events and experiment without sending to real recipients, reducing risk during development.
Import contacts at any scale, manage attributes, and group subscribers with Audiences. Customize your unsubscribe page per team and stay compliant with dynamic suppression lists and automatic unsubscribe handling.
Pricing Plans
Pro
- Remove the “Powered by Resend” footer on unsubscribe pages
- Full API and SMTP access
- Access to visual editor and React Email templates
- Analytics and detailed logs
- Webhooks for delivered, opened, clicked, bounced, and complained events
Enterprise
- All Pro features
- Advanced deliverability support (e.g., managed dedicated IPs guidance)
- Domain reputation and DNS monitoring
- Security and compliance guidance (DKIM, SPF, DMARC, BIMI)
- Custom onboarding and support via Contact Us
Plans are managed in the dashboard Billing page (upgrade, downgrade, manage payment methods, and access invoices). Pro plan users or higher can remove Resend branding from the unsubscribe page. Annual pricing and exact monthly rates were not listed on the provided pages.
Pros & Cons
Pros
- Deep language coverage with official SDKs plus REST/SMTP for quick integration across stacks
- Modern visual editor and React Email components streamline template development
- Robust deliverability tooling including regional sending, managed dedicated IPs, BIMI, and blocklist tracking
- Test Mode and detailed logs make it safe and easy to develop and troubleshoot
- Comprehensive webhooks and analytics provide real-time visibility into the email lifecycle
Cons
- ×Default API rate limit is 2 requests per second, requiring optimization or a request for higher limits for heavy workloads
- ×Removing “Powered by Resend” branding on the unsubscribe page requires Pro or higher
- ×Strict batch validation (default) rejects the entire batch on a single invalid email unless permissive mode is explicitly enabled
- ×Some advanced deliverability features (e.g., dedicated IP management) may require higher-tier plans or additional configuration effort
User Reviews
Guillermo Rauch, CEO at Vercel
Resend is transforming email for developers. Simple interface, easy integrations, handy templates. What else could we ask for.
Vlad Matsiiako, Co-founder of Infisical
Our team loves Resend. It makes email sending so easy and reliable. After we switched to Dedicated IPs, our deliverability improved tremendously and we don't hear complaints about emails landing on spam anymore.
Brandon Strittmatter, Co-founder of Outerbase
I've used Mailgun, Sendgrid, and Mandrill and they don't come close to providing the quality of developer experience you get with Resend.
Giovanni Keppelen, CTO & Partner at VOA Hoteis
All of our customers are located in South America, so having a solution that could send emails from the region closest to our users is very important. Resend's multi-region feature is a game-changer for us.
Frequently Asked Questions
Does Resend support SMTP?
Yes. You can send via SMTP using host smtp.resend.com on port 465 with username 'resend' and your API key as the password.
Can I integrate Resend with Customer.io?
Yes. Customer.io supports a Custom SMTP setup. Add a Custom SMTP server in Customer.io and paste your Resend SMTP credentials to send through Resend.
What is the default API rate limit?
The default rate limit is 2 requests per second. Responses include standard RateLimit headers. You can queue requests or contact support to request a higher limit.
How do I customize the unsubscribe page?
Go to Settings → Unsubscribe Page and click Edit. You can set the title, description, logo, background, text, and accent colors. Pro plan users or higher can remove the “Powered by Resend” footer.
Can I send batch emails with partial success?
Yes. Use the x-batch-validation header. 'strict' (default) rejects the entire batch on any validation error; 'permissive' processes valid emails and returns separate data and errors arrays.
How do I cancel my subscription?
In the dashboard, open Settings → Billing, click the three dots next to your plan, and select Cancel Subscription. You can also manage billing contacts, payment methods, and invoices there.
Get Started
Join thousands of developers who are already using Resend to enhance their workflow and productivity.
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