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Master Resend with our step-by-step tutorial, detailed feature walkthrough, and expert tips.
Sign up and verify your sending domain Install Resend SDK in your agent application Create React email templates for common use cases Integrate API calls into agent communication workflows Set up webhooks to track email delivery and engagement
💡 Quick Start: Follow these 1 steps in order to get up and running with Resend quickly.
Explore the key features that make Resend powerful for developer workflows.
Minimalist API design: send email with a single POST request containing from, to, subject, and content. Supports HTML, plain text, React components, and attachments. Response includes message ID for tracking.
An AI agent that sends analysis results via email with a short integration instead of relying on direct SMTP configuration.
Build email templates as React components using React Email. Templates can be rendered into email-ready HTML while letting React teams reuse component-based development patterns.
Building a weekly AI-generated newsletter template with React components while keeping template work inside a familiar React codebase.
Domain authentication support includes DKIM, SPF, and DMARC configuration for verified sending domains.
Setting up email sending for a new domain with standard authentication records instead of sending from an unverified domain.
Webhook events are listed across plans, with support for email lifecycle visibility such as sent, delivered, opened, clicked, bounced, and complained events.
An agent that escalates a critical notification workflow when webhook events show that an email bounced or generated a complaint.
Batch sending is listed as a supported sending feature, allowing teams to group multiple email sends into a single workflow where supported by the API.
An AI agent that generates personalized weekly reports for a team and sends them through a batch-oriented email workflow.
Manage multiple sending domains within a single account. Public pricing lists 1 domain on Free, 10 domains on Pro, 1,000 domains on Scale, and flexible domain limits on Enterprise.
A SaaS platform where AI agents send emails on behalf of different customer domains with separate authenticated sending domains.
Resend is a smaller, developer-first ESP with a modern API, React templates via react.email, and a cleaner deliverability setup flow. SendGrid and Mailgun are older, deeper platforms with more legacy features (advanced routing, XML-era APIs, mature IP management) but also more complexity. Most modern startups pick Resend for greenfield projects because the DX is faster; teams sending tens of millions of messages per month may still prefer SendGrid or Mailgun for the volume tiers and dedicated IP management. Postmark is the closest 'developer-first' peer but focuses only on transactional email.
Yes — Resend maintains react.email, a companion library that lets you write email templates as React components with Tailwind-style styling. Rendering happens on the server, so the template outputs the HTML the SDK sends. This means email templates live in the same monorepo as the rest of your React/Next.js app, share a design system, and get type-checked with the rest of the codebase — a real advantage over hand-maintained HTML tables.
Yes. Broadcasts is Resend's marketing-email product: audience manager, campaign editor, per-recipient tracking, and basic A/B testing in the same product as the transactional API. It's enough for product announcements, newsletters, and simple lifecycle campaigns. It is not as deep as Mailchimp or Klaviyo for advanced segmentation and multi-step drip journeys, so specialist marketing teams may still keep a dedicated ESP alongside.
Free tier: 3,000 emails/month and 100/day with one domain. Pro at $30/month covers 50,000 emails and multiple domains. Scale plans start around $90/month with higher volume and priority support. Enterprise adds SSO, custom SLAs, dedicated IPs, and a security review; pricing is quote-based. For very high volume senders (multi-million per month) it's worth comparing against SendGrid and Postmark since incremental email costs vary.
Official SDKs cover Node, Python, Go, Ruby, PHP, Java, and .NET. First-class integrations exist for Next.js, Cloudflare Workers, Supabase, and Convex, so common full-stack combinations (Next.js on Vercel with Supabase or Convex) work out of the box with generated types and edge-runtime support.
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Tutorial updated March 2026