# Resend

> Developer-first transactional email with React Email templates.

- **Category:** Developer / transactional API
- **Best for:** Engineering teams sending transactional email from code
- **Rating:** 4.4/5
- **Canonical:** https://campaigncompass.co/tools/resend

Resend set the modern standard for developer-first transactional email: a clean REST API, multiple SDKs, and native React Email so templates live in your codebase. It's the go-to for auth, receipts, and notifications: less so for marketer-owned campaigns.

## What Resend is

[Resend](https://resend.com) is a developer-first transactional ESP: the email API many engineers wished they had after wrestling with older tools. Its signature feature is [React Email](https://react.email), an open-source library that lets you author templates as React components in TypeScript and render to HTML at send time. For React teams, that means email templates are version-controlled code.

Beyond the API, Resend offers managed dedicated IPs that auto-warm and autoscale, IP and domain monitoring (including DNSBL alerts), regional sending to cut latency, and modular webhooks for delivery, open, bounce, and click events.

## Transactional vs marketing

Resend's core is transactional: password resets, receipts, and notifications. It has added broadcast and contact features, but those are newer and less mature than the API. If you need drip sequences or marketer-owned campaigns, teams often pair Resend with a lifecycle tool like [Loops](/tools/loops), or choose a platform that does both.

**Pairing pattern:** A common modern stack is Resend for transactional + a lifecycle tool for marketing. If you want design-quality marketing creative without hand-coding every template, generate it in an AI-native tool such as [Brew](/tools/brew) and export the HTML.

## Pricing

Resend has a generous free tier (3,000 emails/month) and paid plans starting around $20/month, which makes it one of the most affordable options for high-volume transactional sending. See the [pricing page](https://resend.com/pricing) for current limits.

## Verdict

For transactional email from code, Resend is our top pick: the API and React Email integration are unmatched, and the free tier is generous. It's not a lifecycle marketing platform, so pair it with one (or generate marketing creative elsewhere). Engineering-led teams will feel at home immediately.

## Pros

- Best-in-class API design and developer experience
- Native React Email: author templates as version-controlled React components
- Generous free tier (3,000 emails/month) and low entry price
- Managed dedicated IPs with auto-warmup; IP and domain monitoring
- Multiple SDKs (JS, Python, Ruby, Go, PHP) and modular webhooks

## Cons

- Primarily transactional: broadcast/marketing features are newer and less mature
- No deep visual automation builder like lifecycle platforms
- Best suited to teams comfortable writing code

## FAQ

### Is Resend a marketing platform?

Primarily it's a transactional email API. It has added broadcast and contact features, but they're newer than the API. For marketing automation, many teams pair Resend with a lifecycle tool like Loops.

### What is React Email?

React Email is an open-source library built by the Resend team for authoring email templates as React components in TypeScript, rendered to HTML at send time: ideal for engineering teams already using React.