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Constant Contact vs Mailgun vs SendGrid comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Mindshare comparison

As of May 2025, in the Cloud Email category, the mindshare of Constant Contact is 1.8%, up from 1.4% compared to the previous year. The mindshare of Mailgun is 10.0%, up from 8.0% compared to the previous year. The mindshare of SendGrid is 20.0%, up from 15.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud Email
 

Featured Reviews

DG
Gives us a more professional face to our clients
Sometimes, you will be typing in a text box and hit the backspace, but the website will think you meant to go back a page. Basically, you end up losing work when this happens and it is hard to predict. Thus, I have learned to save often and every time I finish a piece of content that I like. I do wish this could be solved, but it is more of a browser issue than a Constant Contact issue. It would be cool if they made an actual app with their own skin to solve the issue with browser incompatibilities.
Christopher Justice - PeerSpot reviewer
Reliable, easy to set up, and offers good email-sending capabilities
We use the solution for high-volume email sending for event management. Simple and perfect for what we need.  It has helped us with email deliverability. The email-sending capabilities are great. It's a very easy product to set up.  The solution is stable. It is scalable.  The solution needs…
Rastu Singh - PeerSpot reviewer
Clean and simple to use with good integration capabilities
There are lots of things that are quite good with SendGrid as compared to other platforms. For example, it is very easy to set up, and it is very clean and simple to use. The email integration is fairly easy, and I can say it is reliable. It also allows you to implement services from other platforms as well. So you can have multiple things in a single place. We're using the API. They provide certain add-ons, like Azure add-ons. You can connect with Azure as well. They have decent support in terms of any issues. They have a nice dashboard as well. It gives almost all information in a single place, and it is scalable.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"It is fun to design your newsletter based on the content you would like to deliver."
"It's a very easy product to set up."
"The most valuable feature is the conditions in automation."
"Easy API documentation is the most valuable feature of SendGrid, including its deliverability rate."
"The API side of things is valuable. It is flexible enough to handle pretty much anything that needs to be done in an automated manner."
"My integration team likes that it's very easy to integrate and very easy to automate based on activities that happen on our core banking application."
"It is easy to set up."
"They have pretty good support in terms of any issues."
"It is a stable and scalable solution."
"The solution scales well."
 

Cons

"Sometimes, you will be typing in a text box and hit the backspace, but the website will think you meant to go back a page. Basically, you end up losing work when this happens and it is hard to predict."
"The solution needs better templating and email validation."
"They should make the solution more user-friendly."
"SendGrid is a great solution. I don't have any areas of improvement."
"The reporting part needs improvement."
"Maybe they could have a mobile application to give to admins, so they could see some insights related to the data."
"The biggest problem that we have faced is with the authentication during login. For certain people, SendGrid requires MFA, which is good as a security feature, but it doesn't always work in all geographies. We've got people and users who are based in Nigeria, and some of those people had real trouble logging into SendGrid because the MFA wouldn't send codes to people on their numbers. The security mechanism that they use for login doesn't work in all geographies."
"SendGrid has room for improvement in the UI/UX or dashboard usability for users. Another area for improvement in the tool is its conditional logic facilities. The response time of SendGrid technical support needs improvement."
"The contact limit alerts need to be improved."
"A long time ago, I may have had an issue, and I had to wait for support, which wasn't that helpful. However, that was a very long time ago. Overall, I've had a good experience."
 

Pricing and Cost Advice

"The cost is fair, and you end up making enough in sales to pay for it."
"We pay $80 a month to use the solution."
"Its cost can vary. It can go as low as $10 or $15 to $1,000 depending on how much you use it."
"The solution is relatively inexpensive."
"I use the essential plan which is $20 a month. After that, we use the pro which is $90 a month, and had all our costs bundled in."
"The basic plan starts at €90 per month."
"We are using the Advanced plan,10K. That is about $100 per month but sometimes we do go over the limit of the plan."
"My company pays for SendGrid monthly, and though I cannot share the amount, my feedback is that the vendor should accept other modes of payment apart from a credit card."
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Top Industries

By visitors reading reviews
No data available
Computer Software Company
20%
Manufacturing Company
10%
Financial Services Firm
10%
Real Estate/Law Firm
8%
Manufacturing Company
13%
Financial Services Firm
10%
Government
10%
University
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Comparisons

 

Overview

 

Sample Customers

Pajama Program
Stripe. GitHub, Heroku
ScoutMob
Find out what your peers are saying about MailChimp, Amazon Web Services (AWS), Twilio and others in Cloud Email. Updated: April 2025.
850,834 professionals have used our research since 2012.