A cost-effective email delivery service for startups

Enjoy hassle-free email with great deliverability, 24/7 human support, and flexible pricing with pay-as-you-go plans and money-saving subscriptions. Try it for free — no credit card needed.

MailerLite team members smiling with graphics showing examples of email delivery metrics.

Ideal for startups

MailerSend integrates quickly into your tech stack, scales with your sendings, and ensures that your emails get delivered.
The best API mailer for Next.js. I'm using it in a React project for transactional emails, the installation was very easy with npm, the API documentation is very clear and the Free tier is enough for small and medium projects.
Zahit R. CEO, IT Services
The ease of integration is super. I write predominantly in Golang for back-end services and I had MailerSend integrated in about sixty seconds flat. I work on small projects typically which need to move fast and I've moved to MailerSend for all transactional email services.
David G. Developer, Small business
After messing around with Mailchimp, it's been a godsend to come across Mailersend. The layout is extremely clear, it hooks up to Zapier, and any issues are cleared up by support in minutes. For small businesses who want to automate emailing this is perfect, and the pricing plan is extremely fair. Most importantly, everything's landing in inboxes.
Ricky B. Academic Director, Education Management

The best email service to support your startup

Quick setup and deployment

Use the official SDKs for quick API integration and maximum functionality or your SMTP credentials for simple, no-code implementation. Start testing immediately with the trial domain.

Cost-effective plans & pricing

Get started with 3,000 free emails per month and pay-as-you-go sending thereafter. Upgrade to a paid plan to access advanced features and lower per-email pricing.

High deliverability guaranteed

Our powerful sending infrastructure is built for peak deliverability at scale while our deliverability experts are dedicated to ensuring emails reach inboxes and your sender reputation is maintained.

Designed for scalability

Whether you send 100 emails or 1 million, MailerSend is built to grow alongside your business. From the affordable and flexible pricing plans to the powerful email API and leading deliverability, MailerSend is easy to scale as and when you need.

Email graphic.


Easily connect other web apps with MailerSend so they work together to automate processes, share information, and enhance your customer experience.

The best email API for startups

MailerSend’s robust API is built for simplicity without compromising on functionality. Get started quickly with libraries for your programming language of choice and comprehensive API documentation.
Read our API docs
curl -X POST \
https://api.mailersend.com/v1/email \
    -H 'Content-Type: application/json' \
    -H 'X-Requested-With: XMLHttpRequest' \
    -H 'Authorization: Bearer {place your token here without brackets}' \
    -d '{
        "from": {
            "email": "your@email.com"
            "to": [
            "email": "your@client.com"
        "subject": "Hello from MailerSend!",
        "text": "Greetings from the team, you got this message through MailerSend.",
        "html": "

Greetings from the team, you got this message through MailerSend.

" }'
use MailerSend\MailerSend;
use MailerSend\Helpers\Builder\Recipient;
use MailerSend\Helpers\Builder\EmailParams;

$mailersend = new MailerSend(['api_key' => 'key']);

$recipients = [
new Recipient('your@client.com', 'Your Client'),

$emailParams = (new EmailParams())
->setFromName('Your Name')

Greetings from the team, you got this message through MailerSend.

') ->setText('Greetings from the team, you got this message through MailerSend.'); $mailersend->email->send($emailParams);
php artisan make:mail ExampleEmail

Mail::to('you@client.com')->send(new ExampleEmail());
const Recipient = require("mailersend").Recipient;
const EmailParams = require("mailersend").EmailParams;
const MailerSend = require("mailersend");

const mailersend = new MailerSend({
    api_key: "key",

const recipients = [new Recipient("your@client.com", "Your Client")];

const emailParams = new EmailParams()
    .setFromName("Your Name")

Greetings from the team, you got this message through MailerSend.

") .setText("Greetings from the team, you got this message through MailerSend."); mailersend.send(emailParams);
package main

import (


var APIKey string = "Api Key Here"

func main() {
    ms := mailersend.NewMailersend(APIKey)

    ctx := context.Background()
    ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
    defer cancel()

    subject := "Subject"
    text := "Greetings from the team, you got this message through MailerSend."
    html := "

Greetings from the team, you got this message through MailerSend.

" from := mailersend.From{ Name: "Your Name", Email: "your@email.com", } recipients := []mailersend.Recipient{ { Name: "Your Client", Email: "your@client.com", }, } variables := []mailersend.Variables{ { Email: "your@client.com", Substitutions: []mailersend.Substitution{ { Var: "foo", Value: "bar", }, }, }, } tags := []string{"foo", "bar"} message := ms.NewMessage() message.SetFrom(from) message.SetRecipients(recipients) message.SetSubject(subject) message.SetHTML(html) message.SetText(text) message.SetSubstitutions(variables) message.SetTags(tags) res, _ := ms.Send(ctx, message) fmt.Printf(res.Header.Get("X-Message-Id")) }
from mailersend import emails

mailer = emails.NewEmail()

mail_body = {}

mail_from = {
    "name": "Your Name",
    "email": "your@domain.com",

recipients = [
        "name": "Your Client",
        "email": "your@client.com",

mailer.set_mail_from(mail_from, mail_body)
mailer.set_mail_to(recipients, mail_body)
mailer.set_subject("Hello!", mail_body)

Greetings from the team, you got this message through MailerSend.

", mail_body) mailer.set_plaintext_content("Greetings from the team, you got this message through MailerSend.", mail_body) mailer.send(mail_body)
require "mailersend-ruby"

# Intialize the email class
ms_email = Mailersend::Email.new

# Add parameters
ms_email.add_recipients("email" => "your@client.com", "name" => "Your Client")
ms_email.add_recipients("email" => "your@client.com", "name" => "Your Client")
ms_email.add_from("email" => "your@domain.com", "name" => "Your Name")
ms_email.add_text("Greetings from the team, you got this message through MailerSend.")
ms_email.add_html("Greetings from the team, you got this message through MailerSend.")

# Send the email
The MailerSend interface showing the SMTP section.

Plug & play SMTP integration

Use your SMTP username and password to quickly start sending without writing code. Ensure emails are reliably and securely delivered every time. 

A graphic with depictions of the drag and drop editor, rich-text editor, and HTML editor.

A choice of 3 email template builders

Design professional, responsive email templates no matter how good your coding or design skills are. Choose from the Drag & drop builder, Rich-text editor, or HTML email builder.  

An example of an invoice email template.

Ready-made email templates for startups

Save time when setting up your emails with our library of ready-to-go email templates you can customize to fit your brand. Add dynamic content such as personalization variables, dynamic tables and conditional statements.

An example of MailerSend analytics.

Advanced analytics and activity

Track emails in real time with delivery insights for each sending domain including processed, delivered and bounced emails. Monitor performance and activity to identify potential sending issues or look for opportunities to improve.

The MailerSend split testing feature.

Email split testing

Carry out email split tests to take the guesswork out of template design. Test 2 or more versions of an email to see which content, subject lines, images and CTAs perform best with your customers.

Award-winning support

Running a startup can be a challenge—the last thing you need is to worry about your email delivery. Our friendly and knowledgeable support team is just a click away whether you need help configuring your account, using the API, or implementing advanced features.

93% satisfaction rate
100% response rate
24/7 support hours
The MailerSend inbound routing feature.

Inbound email processing

Use inbound routing to parse incoming emails and integrate their content into your app or CRM. Effortlessly manage support emails, create conversations between users, and add email-based functionality to your website or app.

Security graphic.

Secure, compliant email delivery

MailerSend is GDPR compliant and built with the latest security protocols to prevent the interception of emails and client data. Security features such as IP allow-listing, 2FA and granular custom roles safeguard accounts against potential threats.

Flexible, scalable plans and pricing for your startup

Test out MailerSend for free with a trial domain in minutes—no credit card needed. Get started with 3,000 emails per month for free and pay as you go for extra emails. Or, upgrade for better per-email pricing and advanced features.
How many emails do you plan to send?
Save 20% by paying yearly
Pricing in Euros and British Pounds is for informational purposes only. All billing invoices will be charged in US dollars.
3,000 emails
Extra usage:
$1.00 1.00 £1.00 /1000 emails
$ / month, billed yearly
Monthly price x 12 =
/ month, billed yearly
Monthly price x 12 =
£ / month, billed yearly
Monthly price x 12 =
$25 / month 25 / month £25 / month
50,000 emails
100 SMS
100 email verification credits
Extra usage:
$0.90 0.90 £0.90 /1000 emails
$1.40 1.40 £1.40 /100 SMS
Taxes may apply, learn more.
Sign up FREE
Upgrade anytime
For large organisations with special requirements.

How to get started with MailerSend

Step 1

Sign up for a free account

Step 2

Send an email from the trial domain

Step 3

Try out the features & check your activity

Frequently Asked Questions

How does MailerSend support startup growth?

MailerSend has a generous free plan which includes 3,000 emails per month, so you can get started without any additional cost. The trial domain allows you to easily test out MailerSend’s capabilities in minutes, without the need to add and verify your own domain. And, our award-winning customer support is available 24/7 to help you get set up. What’s more, MailerSend’s plans and pricing are extremely flexible and transparent, allowing you to effortlessly scale your email as your business grows.

How can startups benefit from MailerSend’s pricing structure?

Smaller startups can easily get started with no cost thanks to our free plan which includes 3,000 emails. From there, you can choose to pay for additional emails on a pay-as-you-go basis, or upgrade at any time for lower per-email pricing and extra features. Our plans have been developed with growth and scalability in mind, and are designed to grow right along with you.

What makes MailerSend different from other email providers?

MailerSend stands out for offering advanced email delivery while being simple for developers to implement and non-technical teams to work with. We also offer competitive, flexible pricing, best-in-class, human customer support, and high-performing deliverability. Check out our email provider comparisons.