Mailgun was founded in 2010, and similarly to SendGrid, was acquired by another company, Pathwire, in 2021.
Since its inception, Mailgun has been geared towards developers and marketers who don’t have an issue working with code. Nowadays it also offers other messaging services provided by its parent company.
Notable features:
- High delivery rates for all plans
- Flexible and affordable pricing plans
- A free tier with lots of features
- Reliable customer support
- Email validation
Email infrastructure comparison
Deliverability
When you’re on the lookout for a new ESP, one of the first things you should check is the deliverability rate they offer, or, the rate that your emails land in your recipients’ inboxes.
Every ESP offers different features for achieving higher rates, and in the case of SendGrid and Mailgun, it’s a close race.
According to SendGrid’s website, the platform promises a deliverability rate of 97% (with Expert Services) . It offers various advanced features that can help you increase your deliverability (more on those later), with the most notable ones being ISP outreach, IP warm-up, and Adaptive Communication Engine.
Having said that, keep in mind that you need to pay for a higher plan to unlock additional deliverability features.
Mailgun boasts a 97.4% deliverability rate. It achieves that by focusing on email validation, real-time monitoring, and other features that help you increase your odds of reaching your recipients’ inboxes.
Moreover, if you’re willing to pay up, you can get help from a dedicated expert by opting for Mailgun deliverability services. They will be able to help you with onboarding and provide you with custom deliverability strategies and guidance so you can get the most out of the platform.
Deliverability features
Regardless of the deliverability rate a provider promises, most of it is in your hands and how you use your tools. To learn more about it, check out our Deliverability Guide. ⬅️
When it comes to SendGrid and Mailgun, both platforms provide the following features:
- Email validation
- Event webhooks
- SPF record authentication
- Insightful analytics
- Deliverability insights
- Dedicated IP addresses
- Inbox placement testing
- Email preview
- Reputation monitoring
- Spam trap monitoring
However, some features are locked at lower-tier plans, especially in the case of SendGrid. For example, to unlock email validation or dedicated IPs, you need to switch to the most expensive plan they offer.
Scalability
What we talk about when we talk about scalability is how reliably an ESP can ensure businesses can grow their operation needs and send a high volume of emails to their customers. That is, without compromising the quality of the service or encountering performance issues.
In short, your provider should allow you to send your emails to 1,000,000 recipients just as well as you would to 100.
G2: 8.8 🌟
From what I’ve seen, the platform has a reliable infrastructure and has quite flexible, although a bit pricey, plans that allow you to upscale your sending needs.
If you’re into statistics and you’re up for some more reads, check out this article by SendGrid. In it, they describe how they processed 4+ billion emails on Black Friday and Cyber Monday back in 2019.
G2: 9.1 🌟
Mailgun offers the Rapid Fire Delivery SLA, which guarantees 99% attempted delivery for up to 15 million messages within the first five minutes of sending.
The pricing plans also allow you to scale your operations easily as you can purchase more email sends without having to switch to a higher tier plan.
Reliability
Both SendGrid and Mailgun boast minimal downtime.
SendGrid
On a monthly basis, SendGrid delivers more than 80 billion emails to its users, some of which include Uber, Spotify, and Airbnb among others.
Link to SendGrid status page
Mailgun
Mailgun provides email services to 225,000 businesses worldwide, such as Wikipedia, DHL, and others. According to its website, the platform delivers more than 400B emails every year.
Link to Mailgun status page
User experience and pricing comparison
Ease of use
Now, I’ll go over how well SendGrid and Mailgun work with other tools and how easy they are to use, which can be a considerable factor when you’re choosing an ESP.
SendGrid
G2: 8.2 🌟 Capterra: 4.1 🌟
SendGrid has a smooth domain verification process and crystal-clear guidelines for sending mail.