Mailgun vs SendGrid: Which One Has a Higher Deliverability Rate?

mailgun vs sendgrid cover image with email grid and gunpoint

If you want to reach more subscriber inboxes, Mailgun vs SendGrid reviews might have caught your attention. Inbox placement is essential for a successful email marketing strategy — if subscribers never see your emails, customer trust and revenue will eventually take a hit.

Choosing between Mailgun and SendGrid might be challenging without comprehensive information on both platforms. We unpack every detail of these apps for better comparison.

Mailgun markets itself as the automation platform for developers. It offers a cloud-based service to send, receive, and track emails from websites or apps. The platform’s API helps developers monitor email performance and optimize emails. The inbound routing feature helps senders know precisely where their emails end up.

SendGrid is a cloud-based SMTP service that helps businesses send transactional emails. The platform also offers email marketing features such as automation, design templates, and sign-up forms. Twilio SendGrid provides application developers with deliverability expertise to ensure their emails reach the customers.

Mailgun and SendGrid simplify transactional email for developers and help manage their servers. If you’ve been weighing your options, this guide will show you Mailgun vs SendGrid comparison, including pros and cons, pricing, and ideal use cases.

SendGrid Homepage
SendGrid Homepage
Mailgun Homepage
Mailgun Homepage


Mailgun vs SendGrid — Which One Should You Choose?

Mailgun and SendGrid share similar core functionality geared towards different user types. If you’re looking for high email deliverability, your choices could differ based on each ESP. 

We’ll compare and analyze Mailgun vs SendGrid features, including:

  • Email deliverability,
  • Tracking,
  • Integrations,
  • Customer support, 
  • Marketing emails,
  • Pricing.

Feature #1: Email Deliverability

Email deliverability determines the success of email marketing, especially with transactional emails. Both Mailgun and SendGrid seem to offer similar deliverability rates. Let’s look at each of them.

Mailgun offers an email infrastructure and comprehensive deliverability features to optimize inbox placement. This includes managed deliverability service to provide API support, IP and domain reputation management, and monitoring of email programs. Mailgun shares that it has an average 97.4% delivery rate and promises a 99% inbox (deliverability) rate compared to the industry average of 85%.

SendGrid shares that its Email Validation API, which validates emails before sending them has increased delivery rates to the intended inbox. SendGrid appears to have a higher-than-average deliverability rate with automated IP warmup, SPF and DKIM authentication, branded links, and email validation tools. Their AI feature continually adapts to changing ISP rules, and its massive monthly scale of 90 billion emails generates data sufficient for machine learning.

Email Marketing PlatformAdvantagesDisadvantages
Mailgun Comprehensive deliverability features: 
‣ API support
‣ IP and domain reputation management
‣ Email program monitoring.
Known for lesser email deliverability and reliability in the past.
SendGrid‣ Email Validation
‣ API and ACE features
‣ SPF and DKIM authenticationBranded links
Deliverability to Microsoft email address is poor with shared IP. 
Email deliverability feature: Advantages and disadvantages

While no platform can guarantee a 100% email deliverability rate, Campaign Refinery has touched upon the highest deliverability rate on the market users report 6x higher inbox placement after joining our platform. 

Campaign Refinery user review 

If you plan to choose Mailgun or SendGrid based on features other than deliverability, let’s discuss them further to help you lock in on an option.

Feature #2: Email Tracking

Mailgun offers real-time data insights and segmentation options to track emails. The data is available through the control panel or API, and users can use webhooks to track their URLs. Additionally, the event tracking is automatically enabled except for unsubscribes, opens, and clicks, which users can enable later. All data for suppression lists (bounces, unsubscribes, and spam complaints) are stored indefinitely.  

SendGrid helps you track data in real time through customizable dashboards. The data exports allow you to run customized analyses and track clicks up to 1000 links per email. SendGrid also tracks transactional data, including notifications from email servers and actions that originate with users.

ESPTracking Advantages Tracking Disadvantages
Mailgun‣ Real-time data insights and segmentation options.
‣ Webhooks to track URLs.
The logs extend to 2 months only.
SendGrid‣ Customizable dashboards
‣ Allows users to track transactional and deliverability data.
There is little information about tracking abilities, which could be challenging for beginners.
Tracking feature — advantages and disadvantages per ESP

Campaign Refinery’s dashboard makes accessing multiple dynamic views of each campaign’s performance easy. For example, users can view broadcast data separate from campaign data and email metrics by date range.

Feature #3: Integration

Mailgun allows you to integrate APIs with existing applications with SMTP relays and comprehensive documentation. Their API library covers popular programming such as Python, Ruby, Java, and C# to suit your development needs. Mailgun may have limited integrations, but has strong partner connections with ecommerce and automated workflow apps.

SendGrid’s partner marketplace covers many apps, including Simon for better data understanding and FullContact to add insights to your customer database. SendGrid also allows you to integrate with websites through API documentation.

ESPIntegration AdvantagesIntegration Disadvantages
Mailgun‣ SMTP relays
‣ Comprehensive API documentation
‣ Occasional error messages
SendGrid‣ Website integration
‣ Comprehensive API documentation
‣ Occasional ‘Not being authenticated’ messages.
‣ Must verify your domain with SendGrid to send emails from the website
Integration Feature — Advantages and disadvantages per ESP

Campaign Refinery allows you to integrate with 800+ marketplaces for better optimization, including OptimizePress and PayKickstart.

Feature #4: Customer Support

Customers often regard Mailgun as having better customer service than SendGrid. However, SendGrid may offer live chat support without a high-volume plan. On G2, Mailgun is rated 8.7/10, while SendGrid is rated 7.7/10.

User reviews on TrustPilot show that Mailgun is quicker to follow up with customer queries, especially when users are locked out of the account. Mailgun is also known to solve issues in under 24 hours of reporting. However, you can only access support tickets based on the plan. For example, you must be on their scale plan from $90/month to access live phone support.

SendGrid’s customer service may be slower than Mailgun’s, but it allows users to access ticket and chat support on the basic plan from $15 per month. However, customers say SendGrid takes almost 25 days or more to solve a query and they also suspend accounts without prior notice.

ESPCustomer Support AdvantagesCustomer Support Disadvantages
MailgunUsually resolves problems within 24 hours.Limited support for low-tier users.
SendGridProvides expert assistance and access to ticket and chat support in low-tier plans.‣ Slow customer service.
‣ The chat redirects to another page.
Customer support Feature —  advantages and disadvantages per ESP 

Campaign Refinery usually responds to customer queries within a few hours. Whether you want to maximize usage or have concerns, our support team is available 24/7 via email and phone calls.

Feature #5: Email Marketing Functionality

Mailgun clarifies that they are more for ‘Developers’ than marketers. While they may have sound API capabilities, their email marketing features may not be the best suited for all email enthusiasts. 

However, the platform resolves these issues through Mailjet: their dedicated email marketing feature. Mailjet allows you to choose from different email templates and build fresh ones with advanced drag-and-drop editor. Their other features include email automation, list management, real-time statistics, advanced segmentation, and personalization.

Mailgun Homepage
Mailgun’s Mailjet Feature

SendGrid offers a dedicated product for email marketing campaigns which offers the following:

  • Email automation,
  • Sign-up forms,
  • Email testing, 
  • Email templates,
  • Bulk email sending,
  • Email statistics,
  • Email templates.

A notable feature is the ease of use — SendGrid offers a user-friendly dashboard and template creation tool to help build personalized marketing campaigns.

SendGrid Marketing page
SendGrid Marketing page
ESPEmail Marketing AdvantagesEmail Marketing Disadvantages
Mailgun‣ Pretty easy to collect feedback and surveys
‣ Storage solutions
‣ Email analytics and automation
‣ Response handling
‣ Set-up can be problematic for non-developers
‣ Data retention for logs and API is 1 day
‣ No possibility to create custom domains
SendGrid‣ Single, recurring emails
‣ Enter contacts without complex integrations
‣ Automation needs improvement
Email marketing advantages and disadvantages

Campaign Refinery offers a beginner-friendly user interface, advanced automation and contacts segmentation functions, customizable email header and footer, and easy-to-set-up re-engagement rules.


Mailgun vs SendGrid Pricing: Which Platform Provides Value For the Money?

If pricing is your main concern, SendGrid offers a free plan while Mailgun provides a free trial. However, both platform’s pricing depends on the number of emails you send and your requirements with the tools.

Mailgun offers a free pilot plan for the first month; look at the table for more plans.

Mailgun Plan TypePriceFeatures Included 
Pilot ‣ Free for the first month 
‣ Renews at $49 after trial period
‣ Unlimited users
‣ 2,500 email address validations
‣ 25 inbox placement tests
‣ 500 email previews
‣ Detailed documentation
‣ Ticket support
Starter$99 / month‣ Unlimited users
‣ 5000 email address validations
‣ 50 inbox placement tests
‣ 1,000 email previews
‣ Spam trap monitoring (1 domain)
‣ Blocklist monitoring (1 IP, 1 Domain)
‣ Microsoft SNDS integration
‣ Other features as pilot
Custom Pricing ‣ Monitor a custom number of domains and IP addresses
‣ Custom email address validations
‣ Custom inbox placement tests
‣ Custom email previews
‣ Designated Technical Account Manager
Mailgun Pricing 

With SendGrid, how much you pay depends on whether you require an API plan or marketing campaign plan. The table below shows the full pricing structure.

SendGrid Pricing PlansPriceFeatures Included
Free $0 / month ‣ Design and code editors
‣ Segmentation
‣ A/B testing 
‣ 3 Email Testing Credits 
‣ 1 Signup Form
‣ 1 Teammate
‣ Ticket support
‣ Automation
Basic Starts at $15 / month ‣ Everything on the Free plan
‣ 10 Email Testing Credits
‣ 5 Signup forms
‣ Ticket and chat support
Advanced Starts at $60 / month ‣ Everything on basic plan 
‣ 60 Email Testing Credits
‣ 15 Signup Forms
‣ Guaranteed response times on ticket, chat, and phone support
‣ 1,000 Teammates
‣ Automation 
‣ Dedicated IP included
SendGrid Pricing Plan 

If you’re not sending millions of emails yet, Mailgun may be the right option to test and scale your email marketing. However, if you want to scale and send marketing emails with advanced features, SendGrid could be a catch for its pricing.

Still, email marketers with serious lists and strategies might need a more powerful solution.


Mailgun vs SendGrid — How to Choose One For Your Growing Needs?

Both platforms can manage many transactional and marketing emails, and choosing one depends on your business needs.

Although Mailgun is a bit technical, it helps you get into the nitty-gritty details of your campaigns and ensures higher email deliverability. SendGrid is more beginner-friendly, focusing on email marketing templates and scalability. 

Overall, SendGrid might be a better choice for non-tech-savvy marketers wanting all the features under one roof for a free plan.

FeaturesMailgunSendGrid
Auto-responders
Disposable Email Detection
Customizable Branding 
Real-Time Analytics
SMTP 
Spam Blocker
Threat Protection
Whitelisting / Blacklisting
Unsubscribe Database
Click Tracking
Bulk Email Verification
Email Campaign Management
Maigun vs SendGrid Features

SendGrid has more features and functionality than Mailgun. 

However, if you’re looking for advanced features with higher deliverability and a pay-as-you-go model, Campaign Refinery will be the best fit. Read on to see why!


Campaign Refinery is the Ideal Combination of Both Platforms. Here’s why:

Campaign Refinery was built on the foundation of ethical email marketing for business owners and email marketers who are serious about their results. 

Campaign Refinery Homepage
Campaign Refinery Homepage

The platform is an excellent fit for businesses with a steep decline in email marketing results due to poor list hygiene and sending habits. Our automatic email list cleaning tool removes harmful and inactive email addresses before you send emails — on average, customers see an increase in open rates of up to 37%. 

With our innovative, engaged delivery engine, perfect sender score, and high-performance automation system, we provide the highest email deliverability on the market. 

Why Choose Campaign Refinery Over Mailgun or SendGrid?

Campaign Refinery takes a simplified approach to email marketing, paying extra attention to your domain and sender reputation. 

Besides maximum deliverability performance, Campaign Refinery offers these unique email marketing features:

  1. Automatic Email List Cleaning tool: Campaign Refinery ensures safe deliverability by removing harmful and inactive email addresses automatically. 
  2. Engagement Gamification: The platform offers engagement points whenever a user opens and clicks on emails.
  3. Evergreen Flash Sales: Use time-sensitive offers to promote urgency and increase conversions.
  4. Mandatory Domain Authentication: Users are required to authenticate their domains for extra safety.
  5. Credit System: Campaign Refinery incentivizes clients to send emails to a more engaged audience group, eventually leading to a better domain reputation and improved deliverability.
  6. Pay-per-email: Pricing is linked to the number of emails sent, not the email list size.
  7. Full feature access: Premium features are accessible to all clients, regardless of their chosen pricing tier.
  8. No limits on contacts: Expand your email list without worrying about the limit on contacts.
  9. Prohibited bad emailing practices: We maintain a strict policy against cold and poor emailing practices. This ensures the highest safety standards for our clients and their subscribers.
  10. Collective IP reputation management: Clients don’t require a dedicated IP address; we help senders thrive on a positive feedback loop.
  11. Ready-to-use campaign library: Select a predefined and optimized campaign template from the campaign library for a hassle-free marketing experience.

How Affordable is Campaign Refinery?

We want clients to make the most of their email marketing. Hence, we charge based on the emails sent instead of their email list. 

Our transparent pricing starts at $99 / month for unlimited contacts and access to premium features such as:

  1. Sophisticated email list cleaning tool,
  2. Comprehensive analytics dashboard,
  3. 800+ integrations with marketing partners,
  4. Responsive customer support,
  5. Email campaign management,
  6. Dynamic fields,
  7. Bulk email verification,
  8. Subscriber management,
  9. Flexible automation,
  10. Smart nurture and post-purchase experiences.

Here’s relevant data for a comprehensive understanding of our pricing.

Campaign Refinery Pricing TierPricingFeatures IncludedCredits Included
Business plan Starts at $99 / month ‣ Unlimited Contacts
‣ Built-in Email List Cleaning
‣ Engaged Delivery System
‣ Automation Rule Builder
‣ Free Campaign Library 
‣ Custom Audience Builder 
‣ Evergreen Flash Sale
50 K
Growth plan Starts at $299 / month ‣ Everything in the Business plan plus
‣ Turn off ”powered by” Text
‣ Reduced Overage Cost
‣ Increased API Volume Limits
200 K
Enterprise plan Starts at $1k+ / month ‣ Everything in the Growth plan plus
‣ Dedicated success manager
‣ Lowest Overage Cost
‣ Custom API volume
1 M
Campaign Refinery pricing

How Complicated Is It to Move to Campaign Refinery?

Campaign Refinery is a straightforward platform for account set-up. However, the complexity of the process depends on which stage the sender is in. 

To maintain the safety of our senders and their recipients, we go through a strict vetting process. We only work with responsible and result-driven senders. 

As you start your journey with us, you’ll go through a similar process:

  1. Set up domain,
  2. Import contacts from your existing CSV file,
  3. Add custom fields,
  4. Assign tags to all imported contacts,
  5. Set triggers and automation rules, 
  6. Build elegant email campaigns,
  7. Start sending your email campaigns,
  8. Track and optimize them for higher conversions!

We aim to be a partner in your email marketing endeavors, and we’re available 24/7 for assistance.

Choose the Best Deliverability on The Market Today

Amidst the sophisticated features, Campaign Refinery is big on list hygiene and email deliverability — our clients report a 600% increase after onboarding with us.

With flexible automation, integrated list hygiene, and a robust tagging system, Campaign Refinery gives you the inboxing you deserve. 

If you’re looking for a high-end toolkit with the best email deliverability rate on the market, Campaign Refinery is the right choice.

Apply to join Campaign Refinery to send result-driven email campaigns without paying extra!

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