Bird vs Resend
Bird vs Resend for transactional email
Bird operates the email sending infrastructure, manages IP reputation and builds its own delivery tools. Choose Bird when you want the team running your sending network to handle delivery feedback, with email, SMS 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 publishes dedicated IPs as a Scale add-on. Its managed dedicated IP pools provide automatic warm-up, scaling based on inbox-provider feedback and continuous reputation monitoring.
Resend does not expose the individual IPs in those pools. The pools dynamically add or remove IPs as sending volume changes.
Bird: infrastructure and reputation
Bird operates its sending infrastructure and develops MTA software, including PowerMTA, which Bird also licenses for self-hosted sending. Bird acquired SparkPost in 2021; its network carries about 40% of the world’s commercial email.
Bird manages its shared sending IPs, dedicated IPs and pools, with automatic warm-up and shared-pool overflow. Bird’s delivery technology adjusts traffic per mailbox provider, while its platform processes delivery feedback and acts on bounce and complaint signals. These are controls Bird operates within its sending stack.
Bird provides Inbox Insights for placement estimates and seed tests, Email analytics for your own sending results, and Competitive Insights for observed competitor campaigns. Bird’s email team can help assess your requirements.
How do Bird and Resend compare?
Resend has the longer retry window and a direct React parameter. Bird combines email with other channels. The rows below compare the documented sending controls and integration choices.
| Capability | Bird | Resend | Who wins? |
|---|---|---|---|
| Send API and DX | Bird’s TypeScript SDK throws typed errors by default; .safe() returns data and error. | Resend’s Node SDK returns data and error from the send call. | |
| Idempotency on send | Bird retains completed responses for 3 hours; later retries are fresh requests. | Resend retains idempotency keys for 24 hours for send and batch send. | |
| Stored message retention | Bird stores sent message bodies for up to 30 days when content storage is enabled. | Resend’s published plans include 30-day data retention; Enterprise retention is flexible. | |
| React Email templating | Render React Email to HTML in your application, then send that HTML with Bird. | Pass a React component through the Node SDK’s react parameter. | |
| SMTP relay | Bird SMTP supports implicit TLS on 465 and STARTTLS on 587 or 2525, with an API key. | Resend SMTP supports implicit TLS and STARTTLS, with an API key. | |
| Channels beyond email | Bird’s API includes email, SMS, WhatsApp, voice, Verify and Realtime. | Resend supports email sending, receiving and email campaigns. | |
| Deliverability heritage | Bird acquired SparkPost in 2021. Its sending network carries about 40% of the world’s commercial email. | Resend launched its email sending platform in 2023, following its open-source email project in 2022. | |
| Dedicated IPs | Bird offers dedicated IPs and pools, with automatic warm-up and pool selection per send. | Resend offers managed dedicated IP pools with automatic warm-up and scaling; its transactional pricing lists them as a Scale add-on. | |
| 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. | |
| Signed event webhooks | Bird signs events with Standard Webhooks, using webhook-id, webhook-timestamp and webhook-signature. | Resend signs webhook requests using svix-id, svix-timestamp and svix-signature. | |
| Mailboxes | Bird’s agent mailboxes provide addressable inboxes, threads, replies and sender rules managed through code. | Resend receives email, exposes content and attachments, and supports replies in the same thread. | |
| Agent tooling | Bird’s hosted MCP server at mcp.bird.com exposes 354 tools. The bird CLI sends and inspects email, manages domains, templates and webhooks, and gives agents JSON output and semantic exit codes. | Resend’s hosted MCP server covers emails, templates, broadcasts, contacts, logs and webhooks. Its CLI manages sending, receiving and other Resend resources. |
How do you handle a send result?
These examples branch on data and error. Bird uses .safe() explicitly; its default client throws typed errors. Use the result style when your application handles 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’s full monthly ladder is shown below. Nearest-volume plans are labelled and are not quotes for Bird’s volume. Check billing terms, features and overages.
Pricing verdict: Bird. The verdict compares the lowest published monthly amount at each exact volume and currency; daily-only allowances, annual commitments, usage rates, starting prices and custom quotes are not compared.
| Bird tier | Emails per month | Bird | Resend |
|---|---|---|---|
| Free | 1,000 | Nearest published volume | |
| Startup | 50,000 | Matching volume | |
| Startup | 100,000 | 2 plans at this volumeExpand to compare every option and its billing terms. Matching volume Matching volume | |
| Growth | 100,000 | 2 plans at this volumeExpand to compare every option and its billing terms. Matching volume Matching volume | |
| Growth | 250,000 | Nearest published volume | |
| Growth | 500,000 | Matching volume | |
| Growth | 1,000,000 | Matching volume | |
| Growth | 2,500,000 | Matching volume |
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?
Port the send call, publish Bird’s domain-authentication records alongside the existing records, import suppressed addresses and update webhook verification. Domain authentication and suppressions require explicit migration steps.
The migration guide maps payload fields and event handling. Test the integration in Bird’s mail sandbox before switching production traffic, and plan a warm-up if you move to a dedicated IP.
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. Resources are in English.
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.