I’ve Tested and Compared SendGrid vs Mailgun: Here’s What I Found

Let’s cut to the chase—SendGrid vs Mailgun. What are the differences between these email sending platforms and which one should you choose?

I aim to answer these questions and provide you with an in-depth comparison of SendGrid and Mailgun.

Disclaimer: The features, prices, and ratings are up-to-date as of writing this article. But, they could change in the future, so they might be different when you’re reading.

SendGrid vs Mailgun: quick summary

SendGrid for businesses who are looking to send basic transactional emails while having additional marketing features.

Mailgun for tech-savvy users who are looking to add email-sending functionality to their apps without having a plethora of extra features.

Criteria	SendGrid	Mailgun
Infrastructure	SMTP, Web API (REST)	SMTP, Web API (RESTful)
Easy setup	✅	❌
Pricing	Could get pricey	Affordable
# of official libraries	7	5
In-depth analytics	✅	✅
Dedicated IPs	✅	✅
Email logs	❌	✅
Email validation	✅	✅
Customer support	Ticket, chat, email, and phone	Ticket, chat, email
Email templates	A wide variety of options	Limited selection
Testing services	Email preview, spam test, link validation	Email preview, email validation

SendGrid vs Mailgun: overview

Founded back in 2009, SendGrid is one of the oldest names in the industry. It was acquired by Twilio in 2018 and since then has evolved from a platform focused on transactional email sending into an email marketing service.

With SendGrid, you can send both transactional and bulk emails with the added benefit of having various marketing features provided by Twilio.

Notable features:

• Integration with Twilio
• Onboarding services
• Easy-to-use editor
• Plethora of templates
• Seamless list management 

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.

• SendGrid

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

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.

• SendGrid

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.

• Mailgun

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.

After some clicking around, you soon get used to the SendGrid UI and realize you have every tool in one place. This is a big plus, as you don’t have to be a coder to learn the ropes.

Mailgun

G2: 8.8 🌟 Capterra: 4.3 🌟

With Mailgun, you’ll have to be at least comfortable with coding or have a team member who is well-versed in it.

On the positive side, its UI is clear, provides all the information you need at hand, and after some research, I wasn’t able to find any customer complaints regarding the interface.

Customer support

Customer support is one of the most important aspects I take into account when reviewing ESPs, and incidentally, it’s an area where SendGrid and Mailgun differ quite a bit.

SendGrid

G2: 7.6 🌟 Capterra: 3.8 🌟

SendGrid has a round-the-clock support team that you can contact via ticket, chat, email, and phone. However, phone support is available only for customers with a Pro or higher account.

Additionally, the response times for your inquiries depend on the pricing plan you choose.

Mailgun

G2: 8.3 🌟 Capterra: 3.9 🌟

Mailgun has a dedicated support team that also works around the clock. You can reach out to them via ticket, chat, or email, but you can’t do it via phone, unfortunately.

Higher-tier plans also get dedicated and prioritized support, whereas free users don’t have access to ticket support and have to rely on help center documentation. 

Support type	SendGrid	Mailgun
Email	All plans	All plans
Tickets	All plans	Limited
Chat support	Basic plan ($15/month)	Growth plan ($80/month)
Live phone	Advanced plan (60/month)	Scale plan ($90/month)

Pricing

When considering the pricing of an ESP, you should take into account whether they cut back on important aspects such as deliverability or features like email logs. An ESP should also match your business’ size and offer the best value for your money.

Overall, I’ve found that SendGrid is on the pricey end as you need to pay up for additional features. Whereas Mailgun pricing is based on the number of emails you want to send, with some advanced benefits reserved for the highest tier plans.

In the following section, I’ll cover both free and paid plans separately, so you can have a better idea of what to expect.

Free plans

SendGrid:

• Up to 5,000 free emails per month
• Email APIs and SMTP relay
• Tracking, analytics, webhooks
• 1-day log retention

Mailgun

• 100 free emails per day
• Email APIs and SMTP relay
• 1 teammate permission
• 1 event webhook
• Dynamic template editor
• Email analytics

Paid plans

Keep in mind that both SendGrid and Mailgun have sliders on their respectable pricing pages, which you can use to increase the emails you can send per month for all plans.

SendGrid:

• Essentials: $19.95/month
  • Up to 50,000 emails per month
  • APIs, SMTP relay
  • 1 teammate permission
  • Features such as analytics, deliverability insights, etc.
  • No access to email validation, dedicated IPs, sub-user management, single sign on (SSO)
• Pro: $89.95/month
  • Up to 150,000 emails per month
  • Access to all features, including the ones not available for Essential tier
• Premier: custom pricing
  • More than 1,500,000 emails per month
  • All features available

Mailgun:

• Foundation: $35/month
  • 50,000 emails per month
  • APIs, SMTP relay
  • Tracking, analytics, 5-day log retention, ticket support
  • Extra emails for $1/1,000 emails
• Scale: $90/month
  • 100,000 emails per month
  • Upgraded Foundation tier features
  • 30-day log retention, dedicated IPs, etc.
  • Extra emails for $0.80/1,000 emails
• Enterprise: custom pricing
  • More than 2,5000,000 emails per month
  • All features from lower tiers included
  • Dedicated support
  • Proactive account monitoring

Customer feedback

In this section, I’ll share the user impressions on SendGrid and Mailgun I’ve found while digging through social media, which, in some situations, can be indicators of how an ESP is doing.

SendGrid

G2: 4 🌟 Capterra: 4.3 🌟

I’ve come across numerous reports on various issues, but the one that, like its original poster, blew my mind was that SendGrid tried to shut down an account three times. 🤯

Review websites like G2 for example have mixed reviews, with most of them being 4+. Here are some impressions from Capterra:

Mailgun

G2: 4.3 🌟 Capterra: 4.2 🌟

Contrary to SendGrid, I’ve seen mostly positive Mailgun reviews on Twitter. 

Here’s what people have to say about Mailgun on Capterra:

Legal compliance

Whether an ESP is compliant with the latest privacy legislation and whether it uses the latest encryption standards should play a big role in your decision.

Component	SendGrid	Mailgun
Compliance	SOC II, GDPR	SSAE-16, SOC I & II HIPAA, ISO27001, GDPR
Encryption	TLS	TLS, HTTPS, AES 256

Transactional email features comparison

Email infrastructure

Here’s an overview of SendGrid and Mailgun email infrastructures and their capabilities:

Feature	SendGrid	Mailgun
SMTP relay	✅	✅
Web API (RESTful)	✅	✅
SPF, DKIM, and DMARC	✅	✅
Dedicated IPs	✅	✅
Isolated sending domains	❌	✅
In-depth analytics	✅	✅
API email tracking	✅	❌
Pre-made templates	✅	✅
3rd party plugins	✅	❌
Test mode	❌	✅
Sandbox	✅	❌
Sink domain	✅	❌

API and integrations

When it comes to API integration, SendGrid is more user-friendly and simpler due to its super extensive documentation and the option to have a 3-month onboarding process with one of its experts. Additionally, it can be integrated with tools like CRM systems or other marketing platforms.

On the other hand, Mailgun is a bit more robust, but fortunately, it also offers solid documentation.

Check out the table below for a detailed comparison. ⬇️

Feature	SendGrid	Mailgun
Official SDKs	Java, Python, Node.js, PHP, Ruby, C#, Go	PHP, Ruby, Go, JS, Java
Setup and integration	Onboarding manual	User manual
API rate limits	600 requests/minute	300 requests/minute
Webhooks	/v3/user/webhooks/	v3/domains/<domain>/webhooks
Events	/v3/user/webhooks/event	v3/<domain>/events
Contact management	/v3/marketing/contacts	v3/lists
Email sending	/v3/mail/send	v3/<domain>/messages
Documentation	Link	Link
Inbound email routing	Available	Available

Analytics

Improving your email deliverability is like writing a book — you can’t do it overnight. But, what you can do is use various analytic features to help you understand what’s working and what’s not and then optimize it bit by bit.

• SendGrid 

G2: 8.3 🌟

With SendGrid, you can keep track of accepted, delivered, opened, unsubbed, failed, bounced, and other emails. 

What I like about SendGrid’s real-time analytics is the detailed categorization of statistics. Namely, you can see how your emails are doing on specific devices or email clients, in specific areas, etc., and on top of that, you can compare them based on categories.

• Mailgun

G2: 8.6 🌟

Similarly to SendGrid, Mailgun lets you keep track of the most important email metrics such as accepted, delivered, opened, unsubbed, etc. 

This is a lot of statistics to keep an eye out on, and Mailgun doesn’t make it easy for you with its bit outdated dashboard. And unlike SendGrid, there isn’t advanced categorization.

You also have to upgrade to at least the basic plan to get some insight into how your emails are doing.

Email marketing features comparison

Email marketing automation

When it comes to email marketing automation, I have to say that SendGrid takes the cake in this regard. 🎂

SendGrid

SendGrid offers features aimed at marketers and businesses for creating, scheduling, and sending marketing emails, and most notably, it includes automated drip campaigns.

Most notably, there’s the Marketing Campaign feature, which lets you build complex workflows that trigger emails based on specific actions or timelines. With it, you can also send and monitor your email marketing campaigns, which can go a long way.

Read more about it here.

Mailgun

Although Mailgun does offer functionalities you can use for email marketing automation, it is more geared towards transactional emails.

With Mailgun, you can also send birthday messages, welcome emails, and even send emails in bulk, however, there are no automated drip campaigns. 

If you’re looking for features like subscriber segmentation, behavioral targeting, or campaign analytics, Mailgun might not be your best bet.

Email design

When it comes to email design, both SendGrid and Mailgun offer drag-and-drop editors and HTML editors that allow you to toggle between HTML and email preview, edit syntax and logic, use Handlebars, etc.

However, I’ve found that SendGrid is far easier to use and has more options that allow you to tweak your emails to make them look just the way you want them to.

SendGrid

G2: 7.9 🌟

SendGrid’s drag-and-drop is super intuitive and lets you customize your emails in a plethora of ways. You can add images and various buttons, insert custom code, choose different coloring, and more.

The more I clicked around their Design Library the more features I found, so there’s really lots of room for personalization. 

Mailgun

G2: 7.7 🌟

Mailgun’s drag-and-drop editor, although intuitive to use as well, doesn’t offer as many personalization options as SendGrid’s.

You can edit the basic stuff like headers, add images, and such, but not much more than that.

Email templates

Both SendGrid and Mailgun offer responsive email templates, which look good on all devices, regardless of whether it’s an Android/iOS or laptop/desktop.

SendGrid

G2: 7.5 🌟

I’ve found that SendGrid has a wider selection for various different purposes. You can get templates for various scenarios, like special holiday sales or promotions.

What I liked the most about the templates SendGrid offers is that you can customize them further, save them, and then reuse them whenever you want.

When it comes to customizing the templates, you can literally make every pixel look the way you want it to with SendGrid’s code editor.

Mailgun

G2: 7.3 🌟

Compared to SendGrid, Mailgun has fewer pre-made templates but at least you can customize them to your liking with the drag-and-drop editor or the HTML editor.

What’s more, you can have a brainstorming session with your Dedicated Technical Account Manager (TAM) and come up with various ideas for new templates.

Email testing features comparison

Once you set up email-sending functionality to your app, you should always test it before sending out your emails.

SendGrid

SendGrid offers a far easier solution with a few more useful features that make it superior in this regard compared to Mailgun.

With SendGrid’s testing, you can check out how an email is rendered across various inbox providers and devices, run it through spam filters, validate all links within it to make sure they work, and then send it once you think it’s ready.

However, a big downside to all of this is that you have limited email testing credits. If you run out of them, you have to purchase additional credits, which can be quite expensive as 100 credits cost $40.00.

Mailgun

Luckily, this isn’t the case with Mailgun. But, in Mailgun’s case, you can’t run your emails through spam filters or validate links. However, you can validate addresses, which makes email lists clean and improves your deliverability.

I must also note that Mailgun’s testing capabilities can require some getting used to, especially if you’re not tech-savvy. In the case of SendGrid, you have lots of supporting documentation and the testing process is quite streamlined.

Here’s a back-to-back comparison of testing features SendGrid and Mailgun offer:

Testing feature	SendGrid	Mailgun
Email preview	✅	✅
Spam test	✅	❌
Link validation	✅	❌
Email validation	❌	✅
A/B testing	✅	❌
Easy to use	✅	❌
Affordable	❌	✅

Can’t decide between SendGrid and Mailgun?

If you can’t seem to decide between SendGrid and Mailgun, check out the articles our email infrastructure experts wrote on SendGrid alternatives and Mailgun alternatives. Among others, they recommend:

• Mailtrap
• Mailjet
• Mandrill
• Postmark
• SparkPost

Personally, I would suggest the Mailtrap Email Delivery Platform where businesses, individuals, and developer teams can Test, Send, and Control their email infrastructure in one place.

Mailtrap consists of Email Sending and Email Testing, and the release of Email Campaigns is on the way.

Email Sending

With Mailtrap, you can send emails either with SMTP or API service. Mailtrap has a straightforward setup process and high deliverability rates by design, meaning you don’t have to pay for a higher-tier plan.

You also get 24/7 customer support, also regardless of the plan you choose, which is huge in my book.

Some other benefits and features that stand out include:

• Dedicated IPs
• Regular weekly reports
• In-depth tracking:
  • Opens and Clicks
  • Delivery and Bounce rates
  • Deliverability Alerts (weekly and hourly if critical)

• Email logs for up to 60 days of sending history

• Separate dashboard for all emails from users of:
  • G. Workspace
  • Gmail
  • Microsoft 365
  • Outlook
  • Yahoo
• Helicopter-view dashboards, drill-down reports, etc.

• Event webhooks
• Email templates

Special mention: with Mailtrap, you get bulk emails for the price of transactional as there are separate streams for Transactional and Bulk email sending, which use different endpoints. 

Lastly, Mailtrap is super easy to set up and configure, regardless of whether you’re migrating from another platform or you’re fresh in the game.

Be sure to check out our migration guides for both SendGrid and Mailgun.

Email Testing

Mailtrap Email Testing lets you inspect and debug in staging, development, and QA environments. By using a fake SMTP server, you can test your emails without spamming your recipients or flooding your own inbox.

Some of the most notable features include:

• HTML/CSS support – Check how your emails look with the most popular mailbox providers.

• Spam checker – Significantly improve your email deliverability rates and prevent your emails from going to spam by keeping your spam score under 5.

• Templates testing – Test your emails with our API and easily switch from staging to production once you think you’re ready to start sending.

• QA automation – Use our Email Testing API and cover all your testing scenarios.

Wrapping up

So, SendGrid vs Mailgun — which platform do you think is better for your email-sending needs?

I advise you to put the needs of your business down on paper, evaluate them, and choose the right email service provider based on the features they offer and the functionality you need. Of course, keep in mind their reliability, track record, customer feedback, etc.

Although you can’t go wrong with your choice between SendGrid and Mailgun, I hope you give Mailtrap a shot as a reliable alternative with a superb free plan (no credit card required).

Any which way, good luck with your choice and happy sending!