# Bird vs Resend for transactional email

Resend set a high bar for email developer experience, and Bird offers the same error-as-value result shape as an option on a typed client. The difference is what runs behind the call: Bird is omnichannel and sends on SparkPost, the platform it acquired in 2021 that carries about 40% of the world’s commercial email. Here is where each one fits. See the Bird Email API for the full surface.

- By the numbers: Bird
- Deliverability scale: ~40% of commercial email
- Message retention: 30 days
- Proven at peak: 19.9B emails, BFCM 2025

## What Resend is great at. Where Bird is different.

### What Resend is great at

- Developer experience as the product. A clean API, first-class SDKs, and an error-as-value result shape by default, where Bird makes it the opt-in half of a client that throws typed errors. Bird agrees with the approach rather than competing against it.
- The creators of React Email. Resend built React Email, so it has the deepest first-party support for templating in React components. Bird works with React Email too, but Resend owns the library.
- Framework-native starters. First-class integrations and starter templates for Next.js, Nuxt, Remix, Astro, and SvelteKit, so the first send is usually a copy-paste away.
- Simple, self-serve pricing. An exact 50K tier at $20/mo and a 1M tier, with a generous free tier. Easy to reason about.

### Where Bird is different

- Channels beyond email. Send email, SMS, and voice from one API and one auth model. Resend is email only, so a second vendor enters the moment you need another channel.
- Built on SparkPost. Bird’s email runs on SparkPost, the deliverability platform Bird acquired in 2021. It carries about 40% of the world’s commercial email, with more than a decade of IP-reputation engineering behind it.
- Dedicated IPs, more accessible. Dedicated IPs and pools with automated warm-up. Resend gates a dedicated IP behind a paid add-on on its Scale plan and up.
- Lower cost at high volume. At 1M emails a month Bird is $525 versus $650 on Resend’s Scale plan. At 50K the two are level.

## Capability by capability.

Resend wins on React Email, the templating library it created, on its framework-native starters, and on the result shape: their SDK returns data and error by default where Bird makes that an option on a client that throws typed errors. Both offer a customer SMTP relay. Bird wins on omnichannel, deliverability heritage and scale on the SparkPost network, more accessible dedicated IPs, and lower cost at high volume. Both are strong developer choices.

| Capability | Bird | Resend | Who wins |
| --- | --- | --- | --- |
| Send API and DX | HTTP API. The SDK throws a typed error hierarchy you narrow with instanceof and every error carries statusCode, requestId and type; .safe() returns data and error instead when you would rather branch on a value. | HTTP API whose SDK returns data and error by default, so the branch-on-a-value shape is the one you get without asking. | Resend |
| Idempotency on send | Idempotency-Key header, reused across retries. | Idempotency-Key header with a 24-hour dedup window. | Even |
| Stored message retention | Stored message body available for 30 days. | 30-day data retention. | Even |
| React Email templating | Works with React Email: render your components and send. | Creators of React Email, with the deepest first-party support. | Resend |
| SMTP relay | Customer-facing relay at eu1 and us1.smtp.bird.com. Implicit TLS on 465, STARTTLS on 587 and 2525, authenticated with a normal API key. | Customer-facing SMTP relay on every plan. | Even |
| Channels beyond email | Email, SMS, WhatsApp, voice, Verify and Realtime on one API and one key, plus a wider omnichannel platform. | Email only. | Bird |
| Deliverability heritage | Runs on SparkPost (acquired 2021): roughly 40% of the world’s commercial email. | A newer platform building its own reputation and scale. | Bird |
| Dedicated IPs | Dedicated IPs and pools with automated warm-up. | Dedicated IP as a paid add-on on the Scale plan and up. | Bird |
| Cost at high volume | $525/mo at 1M. | $650/mo at 1M (Scale). | Bird |
| Signed event webhooks | Fifteen event types with Standard Webhooks signing. | Email events with Svix-based signing. | Even |

## Almost the same call.

Sending one HTML email. Resend and Bird both return a typed result you destructure into data and error, so the shape is nearly identical. The difference is what runs behind the call, not the call itself.

**Resend** · send.ts

```typescript
import { Resend } from "resend";

const resend = new Resend(process.env.RESEND_API_KEY!);

const { data, error } = await resend.emails.send({
  from:    "onboarding@yourdomain.com",
  to:      ["customer@example.com"],
  subject: "Your March invoice",
  html:    "<p>Attached.</p>",
});

if (error) console.error(error.message);
else console.log(data.id);
```

**Bird** · send.ts

```typescript
import { BirdClient } from "@messagebird/sdk";

const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });

const { data, error } = await bird.email
  .send({
    from:    { email: "onboarding@yourdomain.com", name: "Acme" },
    to:      ["customer@example.com"],
    subject: "Your March invoice",
    html:    "<p>Attached.</p>",
  })
  .safe();

if (error) console.error(error.message);
else console.log(data.id);
```

## Pricing at a glance

Resend has no 250K tier, so that row brackets its Scale 200K and 500K plans.

| Emails / month | Bird | Resend |
| --- | --- | --- |
| 50,000 | $20/mo (Starter) | $20/mo (Pro) |
| 250,000 | $170/mo (Premier) | $160–350/mo (Scale 200K–500K) |
| 1,000,000 | $525/mo (Premier) | $650/mo (Scale) |

## Switching cost: Low.

The two APIs are close in spirit. The send fields map directly, both return a data and error result, and the event model lines up, so the code change is small. Domain authentication and the suppression list carry over.

The work is re-pointing webhooks and, if you have a dedicated IP, warming one on Bird. The migration guide covers domain auth, event mapping, and warm-up.

## Bird vs Resend: common questions

### Is Bird’s API as clean as Resend’s?

They share the same idea. Both return a typed result you destructure into data and error, both support idempotency keys, and both ship signed webhooks. If you like Resend’s developer experience, Bird’s will feel familiar.

### Why choose Bird over Resend?

Two reasons mainly: channels and deliverability heritage. Bird sends email, SMS, and voice from one API, so you do not add a second vendor when you need another channel, and it runs on SparkPost, which carries about 40% of the world’s commercial email. Bird also offers more accessible dedicated IPs and is cheaper at 1M emails a month.

### Does Bird support React Email like Resend?

You can use React Email with Bird today: render your components to HTML and send the result. Resend created React Email and offers the deepest first-party support for it, so if creator-level support is the priority, Resend has the edge there.

### Is Bird cheaper than Resend?

At 50K they are level at $20/mo. At 1M Bird is $525/mo versus $650 on Resend’s Scale plan. Around 250K it depends on which Resend plan you land on, since Resend brackets that volume between its 200K and 500K tiers.

## Where to go next

The migration guide is the one to start with: it maps the API field by field.

- [Migrate email from Resend](/docs/guides/email/migrate/resend): Resend’s near-identical payload mapped onto Bird’s send, a suppression list rebuilt because Resend publishes no export, and Svix headers renamed to Standard Webhooks.
- [Bird vs SendGrid](/products/email/compare/bird-vs-sendgrid): Lower cost at scale, idempotency, and channels beyond email.
- [Bird vs Amazon SES](/products/email/compare/bird-vs-amazon-ses): Managed deliverability and a simple API instead of AWS plumbing.
- [Bird vs Mailgun](/products/email/compare/bird-vs-mailgun): Cheaper at every tier, with idempotency and longer history.
- [Bird vs Postmark](/products/email/compare/bird-vs-postmark): Much lower cost at scale, with omnichannel and idempotency.
- [Bird vs MailerSend](/products/email/compare/bird-vs-mailersend): Global omnichannel and deliverability heritage on SparkPost.
- [Bird vs Brevo](/products/email/compare/bird-vs-brevo): Transactional depth and a developer-first API.
- [All email comparisons](/products/email/compare): See every Bird email comparison in one place.