An alternative to Resend

One API.
Infinite emails.

Unosend is the email API built for product teams and enterprises.Send transactional emails and track from one place.

Used by developers at

Cursor
Notion
Intercom
Expo
Descript
Krea
Pylon
Cortex
Contextual
Numeric

Features

Built for the way you work

01

Emails that actually arrive

We run our own mail servers with dedicated IPs, proper DKIM signing, and per-ISP traffic shaping.

Inbox placement
98.2%
Spam rate
0.3%
Bounce rate
1.5%

4

Regions

12

IPs

<3s

Delivery

02

One platform, not ten

Password resets, welcome emails, marketing campaigns — handle it all from one dashboard.

Sent

24,891

Delivered

24,612

Opened

12,305

Clicked

3,841

Emails sent — last 30 days↑ 23%
03

Ship in minutes, not days

A clean REST API and SMTP relay. Grab your API key and go.

send.tspackage.json
TypeScript
1
2
3
4
5
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await unosend.emails.send({

from: 'you@co.com',

to: 'user@gmail.com',

subject: 'Hello',

html: '<h1>Hi</h1>'

});

REST APISMTPNode.jsPythonGoPHPRubycURL
04

Know what's happening

Real-time delivery status and engagement analytics.

Live feed
nowDeliveredj***@gmail.com
2sOpeneda***@hey.com
5sClickedm***@outlook.com
8sDeliveredr***@yahoo.com
12sSentk***@proton.me

99.1%

Delivered

52.3%

Open rate

12.8%

Click rate

Transactional

Emails your users are waiting for

Password resets, order confirmations, verification codes — deliver critical emails in under 3 seconds.

One API call to send

A single POST request. No SDKs required, but we have them if you want them.

POST /api/v1/emails200 OK

{

"from": "noreply@yourapp.com",

"to": "user@gmail.com",

"subject": "Reset your password",

"html": "<p>Click here to reset...</p>"

}

Response: ~120msDelivery: ~2.4s

Marketing

Invite Only

Broadcasts that convert

Send marketing campaigns to your audiences. Unlimited broadcasts, built-in unsubscribe, and real engagement data. Available for Enterprise and 1M+ volume customers.

Compose and send

Write your campaign, pick an audience, and hit send. We handle the rest.

New broadcastDraft
From
hello@yourcompany.com
Audience
All subscribers · 8,420
Subject
What's new in April
Hi {{first_name}}, here's what we shipped this month...

Email Builder

Drag. Drop. Send.

No-code drag-and-drop editor for visual emails.Switch to HTML anytime for full control.

Email Editor

FAQ

Common questions

How does the free plan work?
Will my emails actually reach inboxes?
Can I send from my own domain?
How long does it take to get started?
What kind of emails can I send?
What happens if I hit my monthly limit?

One API. Infinite emails.

Set up your account in under two minutes.
5,000 emails free every month.