Free Email API for Developers and Startups

Send transactional emails from your app with Maileroo’s JSON Email API. Start with 3,000 free emails per month, use ready-made SDKs, and track every send from one straightforward platform.

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Free Email API

The Developer-First Email API

A powerful JSON API to send basic, bulk, or scheduled emails with attachments, inline images, and Handlebars templates. We provide a 99.90% uptime guarantee, ready-to-use SDKs, and a platform built for developers by developers. No enterprise BS.

Templates & Handlebars Support

We have built a powerful template system that allows you to create dynamic emails with ease. Use our in-house template builder or implement your own templates using Handlebars syntax. Personalize your emails with dynamic tags and create engaging content that resonates with your audience.

Bulk & Scheduled Emails

Send bulk emails to your users with ease. Our email API allows you to send up to 500 emails at once, ensuring that your messages reach your audience quickly and efficiently. Schedule emails to be sent at a later time, making it easy to send important notifications or updates to your users.

Easy Integration & SDKs

Our free JSON-based email API is easy to integrate. With ready-to-use SDKs for PHP, Laravel, Node.js, Python, Go, .NET, Java, and more, you can quickly add email functionality without complex setup. Our platform is built for developers by developers, ensuring a smooth integration experience.

Attachments & Inline Images

Easily include attachments and inline images in your emails. Our email API supports file attachments and inline images, allowing you to send rich content directly to your users' inboxes. Enhance your emails with images and files that provide additional context and value to your messages.

Custom Headers & Tags

Add custom headers and tags to your emails for better organization and tracking. Our email API allows you to include custom headers in your requests, enabling you to categorize and manage your emails effectively. Use tags to track the status of your emails and monitor their delivery.

3,000 Emails/Month Free

Our free email API offers a generous free tier, allowing you to send up to 3,000 emails per month without any cost. This makes it easy for developers and businesses to get started with email functionality without worrying about expenses. Upgrade to our paid plans as your needs grow.

Start Sending in the Language You Already Use

Use Maileroo’s SDKs and libraries to connect your application faster. Choose from PHP, Node.js, Python, Go, cURL, and more.

All the Tools You Need to Send Emails

SMTP Relay & Email API

SMTP Relay & Email API

Send your messages the way you prefer, whether via API or SMTP. Both integrate smoothly with your systems and are built for simplicity.

Real-time Logging

Real-time Logging

Track every email in real time—from sends and deliveries to opens and clicks. Troubleshoot faster with complete event details.

Insights & Analytics

Insights & Analytics

Understand how your campaigns perform with metrics like open rates, clicks, and bounce data to fine-tune your email strategy.

Custom Tracking Domains

Custom Tracking Domains

Brand your tracking links with your own domain to build trust and boost deliverability. SSL included, quick setup guaranteed.

Webhooks

Webhooks

Keep your application instantly updated with webhooks for events like opens, clicks, and bounces, ensuring your data stays current.

Inbound Routing

Inbound Routing

Say goodbye to no-reply addresses. Forward incoming emails to your application or inbox, allowing you to handle replies and interactions seamlessly.

Fast to Test.
Ready to Build With.

Maileroo gives developers a straightforward JSON Email API for transactional email.

Start with 3,000 free emails per month. Pick the SDK that fits your stack. Add templates, attachments, tags, custom headers, and webhooks when you need them.

No mail server project. No overbuilt platform. Just a cleaner way to send from your app.

Sign Up for Free
Generate Email API Sending Key
Send Dynamic Emails

Create Dynamic Emails
With Handlebars Templates

Build reusable templates with variables, loops, and conditional logic, then send them through Maileroo’s Email API.

Use them for receipts, alerts, onboarding emails, password resets, and other messages that need personal details without hardcoding every email.

Start Sending Free
Background Circle

Crafted for a Delightful Email Experience

Inbound Email Routing

Inbound Email Routing

Receive emails directly into your application with our inbound email routing service.

GDPR Compliant

GDPR Compliant

Our servers are based in Europe, ensuring full GDPR compliance. Your privacy is our top priority.

Scalable Infrastructure

Scalable Infrastructure

We run on a scalable infrastructure that can handle any volume of emails you throw at us.

High Deliverability

High Deliverability

We prioritize maintaining a high IP reputation to ensure your emails land in the inbox.

Analytics & Logging

Analytics & Logging

Track your email performance with our detailed analytics and logging features.

99.95% Uptime

99.95% Uptime

We're committed to delivering reliable service with an impressive 99.95% uptime track record.

Friendly Email API & Webhooks

Friendly Email API & Webhooks

Developers love our easy-to-use API and webhooks for integrating email into their applications.

List Cleaning & Validation

List Cleaning & Validation

Ensure your email list is clean and up-to-date with our list cleaning and validation service.

Branded Tracking Links

Branded Tracking Links

Customize your tracking links with your own domain to maintain brand consistency.

Why Developers Choose Maileroo

Helpful Support

Helpful Support

Get real support when you need help with setup, sending, or delivery issues.

Reliable Infrastructure

Reliable Infrastructure

Maileroo is built to support dependable application email, with a 99.90% uptime SLA.

Built to Scale

Built to Scale

Start with a free tier, then grow into higher sending volumes without rebuilding your email stack.

Do More Than Send Email

Build, send, track, and manage application email from one platform. Start with 3,000 free emails per month and connect with SMTP or Maileroo’s Email API.

Get Started for Free

Trusted by Teams Sending Real Email at Scale

See how developers and businesses use Maileroo to send, manage, and monitor application email.

Reviews

Hear From Our Satisfied Customers

Don't just take our word for it. Read what our customers have to say about our service.

Vincent Turner

Vincent Turner

“I've been through a number of mail services over the last few years and maileroo is a standout for me. Everything about it. The underlying service is great, the architecture is solid and its super reliable and delivery is fast. As well as that the UX for the interface is also really well crafted making it a pleasure to use. Beyond that the service levels are superb, fast and useful. Lastly, the price point is superb. It really is hard to fault Maileroo, I'd give it 6 stars out of 5 if I could”
Rizky Muhammad

Rizky Muhammad

“Very pleasant experience with Maileroo. We successfully migrated from Mailjet without any problems. The technical team was very helpful and listened to suggestions and created new features in a relatively short time.”
Aarón B.

Aarón B.

“I really like it. It is a new service, so there is always the possibility that as it grows, it might deteriorate over time, but my experience so far has been exceptional. The instructions for adding domains are clear and easy to follow, domain verification after adding the correct DNS records is very fast, the emails are sent promptly, and so far none of them have ended up in spam folders.”
Umar Faruk

Umar Faruk

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“Maileroo offers an appealing email-sending solution for website owners, and I am extremely pleased to collaborate with them. Their platform is user-friendly and the assistance they provide is remarkably prompt and supportive.”
Shaun Smith-Roberts

Shaun Smith-Roberts

“What a Joy to work with, I couldn't be more impressed with the services provided by Maileroo.com. From the moment I signed up, the experience was seamless and efficient. The platform is incredibly user-friendly, making it easy for me to manage my emails and campaigns effortlessly.”
Darius (Webmate)

Darius (Webmate)

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“The support was really fast, and the whole process was very easy to set up. I requested an increase in the 100 emails/hour limit, and within a few minutes, the team had increased it. So far, so good.”
Kris Flynn

Kris Flynn

“I'm not a techie person or programmer, and this is my first time using an SMTP server. I was having some issues setting up one of my tools with maileroo's SMTP servers. A quick support chat inquiry led me to one of the co-founders who spent about an hour with me to solve my issue. In the end, it was all my own human error. We were able to fix the issue, but the best thing about the whole experience was how patient and pleasant Areeb was. Just a really great experience, especially for someone like me who isn't a developer or IT specialist.”
Larry

Larry

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“Maileroo is easy to congifure the SMTP relay to send your transactional emails. It works perfectly. The SMTP plugin that you recommended did not work for me, but I had both problem using a free SMTP plugin. Also I was not able to understand how to use the API. I would like to be able to assigns sending limits per each domain. I only purchased I code because there was only 1 Tier listed. I might have stack 2 codes if I new the limits offer with 2 codes.”
piccinato

piccinato

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“Congratulations to the Maileroo team for creating an easy and user-friendly platform. This is a very nice and generous deal. Thank you.”
christina

christina

“I was blown away by the customer support of Maileroo. I signed up for a free tier of their service because I had a client with simple but specific needs and it seemed like a perfect fit. However, since I was new to setting any of this up, the entire process was a learning curve for me.”
Grega

Grega

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“We were searching for a new SMTP provider, after the one we were using raised the prices for the 3rd time - in 2 years. We Found Maileroo and couldn't be happier. Everything works smoothly, prices are top-notch, and their support is friendly and helpful.”
Ed Ellingham

Ed Ellingham

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“We've been using Maileroo for quite a while now and it just works. Great features, and even better support!”
Dahunsi

Dahunsi

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“AWESOME! I got to know about Maileroo through an online community and I tried it. I have not used any other service for my transactional mail since then.”

See How Teams Use Maileroo

Explore customer stories from businesses sending transactional and marketing emails with Maileroo.

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Listen To Their Stories

Success Stories

Find out how Maileroo is helping thousands of businesses send transactional & marketing emails.

Ready to start sending emails?