SendGrid vs. Mandrill vs. Mailgun

SendGrid vs Mandrill vs Mailgun: What are the differences?

SendGrid, Mailgun, and Mandrill are all transactional email services. While historically the three have been very close competitors, in 2016 Mandrill merged with MailChimp and prices rose considerably for most transactional users.

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What is SendGrid?

SendGrid's cloud-based email infrastructure relieves businesses of the cost and complexity of maintaining custom email systems. SendGrid provides reliable delivery, scalability and real-time analytics along with flexible API's that make custom integration a breeze.

What is Mandrill?

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

What is Mailgun?

Mailgun is a set of powerful APIs that allow you to send, receive, track and store email effortlessly.

Want advice about which of these to choose?Ask the StackShare community!

Why do developers choose SendGrid?
Why do you like SendGrid?

Why do developers choose Mandrill?
Why do you like Mandrill?

Why do developers choose Mailgun?
Why do you like Mailgun?

What are the cons of using SendGrid?
Downsides of SendGrid?

What are the cons of using Mandrill?
Downsides of Mandrill?

What are the cons of using Mailgun?
Downsides of Mailgun?

Why do developers choose SendGrid vs Mandrill vs Mailgun?

  • SendGrid is known for being reliable, well-documented, easy to set up, cheap, and simple.
  • Mandrill is loved by MailChimp users; it’s been appreciated for its webhooks, great API, simple installation, and client libraries.
  • Mailgun is called “ridiculously reliable.” Fans appreciate its quick email integration, easy setup, extensive APIs, nice UI, and free plan option.
How much does SendGrid cost?
SendGrid Pricing
How much does Mandrill cost?
Mandrill Pricing
How much does Mailgun cost?
Mailgun Pricing
What companies use SendGrid?
2942 companies on StackShare use SendGrid
What companies use Mandrill?
2614 companies on StackShare use Mandrill
What companies use Mailgun?
1699 companies on StackShare use Mailgun
What tools integrate with SendGrid?
39 tools on StackShare integrate with SendGrid
What tools integrate with Mandrill?
13 tools on StackShare integrate with Mandrill
What tools integrate with Mailgun?
25 tools on StackShare integrate with Mailgun

What are some alternatives to SendGrid, Mandrill, and Mailgun?

  • Amazon SES - Bulk and transactional email-sending service.
  • Postmark - Email delivery for web apps - done right.
  • SparkPost - The most advanced transactional email delivery service in the cloud
  • Mailjet - Email delivery made easy

See all alternatives to SendGrid

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Related Stack Decisions
Luke Hamilton
Luke Hamilton
Sr. Engineer at StackShare · | 4 upvotes · 6864 views

At StackShare we were discussing how to increase the retention of our newly signed up users. We hypothesized that if we made certain changes to the emails in our on-boarding process we could increase our retention and activation of users.

We decided to use sendwithus because it offered us the ability to A/B test our transactional emails. We also utilized the sendwithus analytics dashboard to gain real time insight into the performance of our email campaigns. Furthermore sendwithus has a Rails gem that allowed us to easily integrate the product into our application. We were also able to integrate sendwithus with our SendGrid account. #ABTestingAnalytics #TransactionalEmail

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Todd Gardner
Todd Gardner
President at TrackJS · | 8 upvotes · 7573 views

We've moved our transactional email away from Mandrill to Mailgun. We had continued using Mandrill after Mailchimp deprecated the service awhile back, because the amount of credits we were offered essentially made it free.

However, following a couple weeks of frequent downtime and poor service transparency from Mandrill, we decided it was time to make the switch. It appears they no longer had any engineers with the ability to identify the core problems.

Mailgun has been more reliable, yet not as reliable as we expected. We still see issues a few times per week with the API failing when we attempt to make a call. The Reporting UI is way better.

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