Bird vs Resend
Bird vs Resend for transactional email
Deliver transactional emails and marketing broadcasts on sending infrastructure Bird owns and operates, with self-service dedicated IPs, programmable agent mailboxes, and email, SMS, WhatsApp, and voice in one API.
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By the numbers
Bird network
About 40% of commercial emailStored message bodies
Up to 30 days, with storage enabledWho controls the sending stack?
Resend: managed IP pools
Resend offers dedicated IPs as an add-on on its Scale plan. Its managed dedicated IP pools handle automated warm-up, capacity scaling from inbox-provider feedback, and reputation monitoring.
Resend abstracts away the individual IP addresses inside those managed pools, automatically adding or retiring IPs as your sending volume shifts.
Bird: infrastructure and reputation
Bird runs its own global sending infrastructure and develops the underlying MTA software, including PowerMTA for on-premises sending. Bird acquired SparkPost in 2021, and its network delivers roughly 40% of the world’s commercial email.
Manage shared IPs, named dedicated IPs, and custom IP pools with automated warm-up and shared-pool overflow. Bird’s Momentum MTA adapts delivery rates per mailbox provider in real time and automatically suppresses hard bounces and spam complaints to protect your sender reputation.
Check folder placement with Inbox Insights seed tests, inspect delivery metrics in Email analytics, and benchmark rival senders in Competitive Insights, backed by Bird’s deliverability specialists.
How do Bird and Resend compare?
Resend offers a 24-hour idempotency window and renders React components directly inside its Node SDK. Bird pairs its global SparkPost sending network and custom IP pools with programmable agent mailboxes and multi-channel messaging in one API.
| Capability | Bird | Resend | Who wins? |
|---|---|---|---|
| Send API and DX | Bird’s TypeScript SDK throws typed errors by default and offers a result-tuple mode for explicit error branching without try/catch blocks. | Resend’s Node SDK returns a data and error result object from each send call. | |
| Idempotency on send | Bird retains completed send responses for 3 hours so retried requests with the same key never duplicate an email. | Resend retains idempotency keys for 24 hours across single and batch sends. | |
| Stored message retention | Bird stores rendered message bodies for up to 30 days when content storage is enabled. | Resend’s published plans include 30-day data retention, with custom retention available on Enterprise. | |
| React Email templating | Render React Email components to HTML in your application and pass the compiled markup to Bird’s send endpoint. | Pass a React Email component directly to the Node SDK, which renders the HTML during the send call. | |
| SMTP relay | Bird SMTP supports implicit TLS on port 465 and STARTTLS on ports 587 and 2525, authenticated with your standard workspace API key. | Resend SMTP supports implicit TLS and STARTTLS, authenticated with a Resend API key. | |
| Channels beyond email | Bird’s API covers email, SMS, WhatsApp, voice, Verify, and Realtime in one workspace. | Resend focuses exclusively on transactional email, inbound email receiving, and marketing broadcasts. | |
| Deliverability heritage | Bird acquired SparkPost in 2021, and its sending network delivers roughly 40% of the world’s commercial email. | Resend launched its email sending platform in 2023, building on its 2022 React Email open-source library. | |
| Dedicated IPs | Bird offers dedicated IPs and custom IP pools with automated warm-up and per-message pool selection. | Resend offers managed dedicated IP pools with automated warm-up and scaling as a paid add-on on the Scale plan. | |
| Published pricing | Bird email plans and rates supply the live amounts in the plan table below. | Resend plans and rates supply the dated publisher amounts in the plan table below. | Mixed by volume |
| Signed event webhooks | Bird signs webhook deliveries using Standard Webhooks with cryptographic ID, timestamp, and signature headers. | Resend signs webhook requests using Svix cryptographic ID, timestamp, and signature headers. | |
| Mailboxes | Bird’s agent mailboxes provide programmable inboxes, conversation threads, quote-stripped replies, and sender rules. | Resend receives incoming email, exposes message content and attachments, and supports threaded replies. | |
| Agent tooling | Bird’s hosted MCP server exposes 354 tools, and the Bird CLI manages domains, templates, webhooks, and sends with structured JSON output and semantic exit codes. | Resend’s hosted MCP server covers emails, templates, broadcasts, contacts, logs, and webhooks, while its CLI manages sending and receiving. |
How do you handle a send result?
Both examples branch on returned data and error values rather than wrapping the send call in a try/catch block. Bird’s SDK throws typed errors by default and includes an explicit result-tuple mode when you prefer handling errors as values.
Resend
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
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);
What changes around the send call?
Can an agent receive and reply to email with either provider?
What happens if a retry job resumes the next day?
Published email plans
Bird paid plans add a monthly deposit to a shared balance. Transactional sends use the plan's rate. The comparison below assumes the balance is used only for email; other usage and add-ons cost extra.
Pricing verdict: Mixed by volume. At each rival allowance, Bird's estimated monthly cash requirement is the greater of the paid plan deposit and transactional usage at its published rate. The Free plan uses its included allowance where available. Deposits are spendable balance, not an extra fee. Only matching volumes and currencies with complete rates affect the verdict.
| Emails per month | Bird plan and monthly cash required | Resend |
|---|---|---|
| 3,000 | Email Startup: $15 (USD) | |
| 50,000 | Email Startup: $20 (USD) | |
| 100,000 | Email Startup: $40 (USD) | |
| 200,000 | Email Startup: $80 (USD) | |
| 500,000 | Email Startup: $200 (USD) | |
| 1,000,000 | Email Startup: $400 (USD) | |
| 2,500,000 | Email Startup: $1,000 (USD) |
Resend: Published plans
How should you compare email costs?
What do the Bird and Resend price rows include?
Switching cost
What does a Resend migration involve?
Moving from Resend to Bird takes four steps: swap the SDK send call, publish Bird’s DKIM and return-path DNS records alongside your existing records, import your suppressed addresses so you never email bounced or unsubscribed recipients, and update your webhook signature check.
Our migration guide maps every request field and delivery event between the two APIs. Verify your webhook handlers in Bird’s mail sandbox before switching production traffic, and schedule an automated warm-up window if you are moving onto new dedicated IPs.
Bird vs Resend: common questions
Can I keep my React Email templates when moving to Bird?
Put it into practice.
Continue with the documentation, guides and examples for this topic.
Where to go next
Start with the migration guide to map the integration and test the cutover.
Talk to our email team
See how Bird fits your Resend workflow.
Test your sender, templates and delivery events before moving traffic from Resend. For a larger move, plan the cutover with an email specialist.
Create your account and test your integration. Your migration enquiry will include the provider you are comparing.