The email delivery service that developers actually love
Stop worrying if your transactional emails made it to the inbox. Send with confidence using the best transactional email platform — blazing fast, reliable, and built for developers.
Get 5,000 free emails per month — No credit card required
Trusted by thousands of businesses worldwide to send transactional emails
What are transactional emails?
Transactional emails are individualized messages triggered by user actions — password resets, order confirmations, shipping notifications, and more. Unlike marketing emails, they're anticipated by the recipient and deliver critical information exactly when it's needed.
Start sending in minutes
How to send transactional emails with API? With libraries for every language, Transactional Email Platform fits seamlessly into any stack. Get started with just a few lines of code.
curl --location 'https://useapi.useinbox.com/notify/v1/send' \
--header 'Content-Type: application/json' \
--data-raw '{
"from": {
"name": "Example",
"email": "[email protected]"
},
"to": [
{
"email": "[email protected]"
}
],
"subject": "Welcome",
"htmlContent": "<html><body>Hello #name# #lastname#, Welcome to INBOXNotify</body></html>",
"customFields": {
"name": "John",
"lastname": "Doe"
}
}'<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => 'https://useapi.useinbox.com/notify/v1/send',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'POST',
CURLOPT_POSTFIELDS =>'{
"from": {
"name": "Example",
"email": "[email protected]"
},
"to": [
{
"email": "[email protected]"
}
],
"subject": "Welcome",
"htmlContent": "<html><body>Hello #name# #lastname#, Welcome to INBOXNotify</body></html>",
"customFields": {
"name": "John",
"lastname": "Doe"
}
}',
CURLOPT_HTTPHEADER => array(
'Content-Type: application/json'
),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;var axios = require('axios');
var data = JSON.stringify({
"from": {
"name": "Example",
"email": "[email protected]"
},
"to": [
{
"email": "[email protected]"
}
],
"subject": "Welcome",
"htmlContent": "<html><body>Hello #name# #lastname#, Welcome to INBOXNotify</body></html>",
"customFields": {
"name": "John",
"lastname": "Doe"
}
});
var config = {
method: 'post',
maxBodyLength: Infinity,
url: 'https://useapi.useinbox.com/notify/v1/send',
headers: {
'Content-Type': 'application/json'
},
data: data
};import http.client
import json
conn = http.client.HTTPSConnection("useapi.useinbox.com")
payload = json.dumps({
"from": {
"name": "Example",
"email": "[email protected]"
},
"to": [
{
"email": "[email protected]"
}
],
"subject": "Welcome",
"htmlContent": "<html><body>Hello #name# #lastname#, Welcome to INBOXNotify</body></html>",
"customFields": {
"name": "John",
"lastname": "Doe"
}
})
headers = {
'Content-Type': 'application/json'
}
conn.request("POST", "/notify/v1/send", payload, headers)
res = conn.getresponse()
data = res.read()
print(data.decode("utf-8"))First-class developer experience
We're engineers who love building tools for other engineers. INBOXNotify is the transactional email platform we always wished we had — simple REST API, clear documentation, and infrastructure that just works.
- REST API & SMTP — integrate in minutes
- Real-time delivery logs & analytics
- Webhooks for bounces, opens & clicks
- DKIM, SPF & DMARC out of the box
{ "messageId": "a08045a6-122a-4e16-ace1-aa81df4278ac" }
{ "messageId": "c3be1838-b80e-457a-9fc5-3abf49c3b33e" }
{ "messageId": "13359f77-466e-436d-9cb2-ff0b0c9a8af4" }
First impressions of Transactional Email Platform
We have intentionally designed our system to offer the functionalities you prefer, positioned exactly where you require them, without unnecessary complexity.
Everything you wished for.
- Email delivery made for developers
- Unrivaled transactional email deliverability
- Practical data and analytics
- Trustworthy support from the award-winning team
- Flexible templates and high personalization
- Transactional email open rate optimization
Nothing you didn't wish for.
- Sad customers asking about missing emails
- Uncertain email delivery
- Outages and delays with no explanation
- Costly add-ons and extras
- Unhelpful and slow support
- Convoluted infrastructure and APIs
Stellar deliverability without a dedicated IP
Transactional Email Platform has serious street cred with inbox providers. We vet every new sender carefully, help you follow transactional email deliverability best practices, and never let spammers use our platform. Your emails land in inboxes — not spam folders.
Promotional and transactional emails never mix
Our Email API and SMTP service let you send transactional emails with ease — password resets, notifications, order confirmations, and more. To protect deliverability, we route promotional messages through a parallel but separate sending infrastructure.
Learn more about Message Streams
Beautiful templates with Drag & Drop Editor
Create stunning transactional email templates for order confirmation, shipping updates, and more. Our InboxBrush editor makes transactional email personalization effortless — add links, images, and style text without writing a single line of code.
Explore email templatesGreat support as a standard
It's not just our email delivery that's fast and reliable. Our knowledgeable customer success team is here for you — and we never make you pay extra for premium support.
Ready-to-use notification templates
Discover professional email templates for 2FA, order confirmation, password reset, invoice and more. Preview and use them in your projects.
Try Transactional Email Platform today
Send 5,000 transactional emails per month for FREE or go all-in with a Premium plan. The best transactional email service for ecommerce and SaaS.
More features to explore
With its abundant features, Transactional Email Platform enables you to save time and expand your business. The best transactional email software for modern teams.
Realtime Reports
Track every email from send to delivery with live analytics
Email API
RESTful API designed for developers — simple, powerful, intuitive
Drag & Drop Editor
Build beautiful email templates without any coding knowledge
Webhooks
Real-time event notifications for bounces, opens, and clicks
SMTP Service
Drop-in SMTP relay for your existing email infrastructure
Instant Deliverability
Lightning-fast email delivery — reach inboxes in under 2 seconds
Email Templates
Pre-built transactional email templates for order confirmation & more
Security
Enterprise-grade security with DKIM, SPF, and DMARC support
Learn about transactional email
Guides, best practices, and insights to help you master email deliverability and high-conversion transactional design.
Beyond expectations
INBOX is driving remarkable experiences that enable success stories, empower businesses, and fuel growth — from startups to enterprises sending millions of transactional emails.
I used many different email software for campaign management before, but INBOX has given me the best value in terms of ease of use, cost-effectiveness, and deliverability. It's very easy to setup and use because of its clean and intuitive user interface.
Overall, I highly recommend INBOX to companies and projects regardless of their size and volume. Their deliverability and support are awesome! User interface is pretty fast and user friendly. INBOX will be the only thing you will need in terms of any external communication tools.
I really needed something to get me back in the game with some of my older funnel users. INBOX gave me the perfect set-up to revisit them with eye-catching content — I just didn't have the tool I needed until now.
I used many different email software for campaign management before, but INBOX has given me the best value in terms of ease of use, cost-effectiveness, and deliverability. It's very easy to setup and use because of its clean and intuitive user interface.
Overall, I highly recommend INBOX to companies and projects regardless of their size and volume. Their deliverability and support are awesome! User interface is pretty fast and user friendly. INBOX will be the only thing you will need in terms of any external communication tools.
I really needed something to get me back in the game with some of my older funnel users. INBOX gave me the perfect set-up to revisit them with eye-catching content — I just didn't have the tool I needed until now.
Ready to get started?
Join thousands of businesses that already trust their transactional email delivery to Transactional Email Platform. Start sending transactional emails today.
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