The Top 10 Most Popular Email Marketing SaaS tools of 2021

The most popular email marketing tools of 2020, according to data from Cledara
The Top 10 Most Popular Email Marketing SaaS tools of 2021

Probably you have heard that, if you are trying to attract and nurture leads, social media is the way to go. It is fresh, it is not as intrusive, and it is reasonably priced. Instagram, Facebook, Twitter, and Linkedin have turned into great marketing channels.

It is not the objective of this post to underestimate the power of Facebook ads or Instagram influencer campaigns. But we are going to take a look into why you might be missing an important piece of the marketing pie: email campaigns.

We know, it doesn’t sound as cool. But let us illustrate you with some stats that might change your opinion!

Why you need to invest in email marketing

When figuring out where to launch a marketing campaign, it is common that social media channels ring the bell. Everybody uses Instagram, Facebook, or Twitter. So it makes sense to have a strong presence on these very channels. Plus, the price is very reasonable compared to other channels. So let’s build a social media campaign!

Not so fast. Have you considered email marketing?

It is interesting to see that our customers might spend more time on email than what you initially thought. For example, according to an Optimonster report, email usage is above 91% in the 15-24 age group. Yes, even teens have emails.

As a matter of fact, almost everybody uses an email account.

Source: Optinmonster

And this isn’t all. As you know, the key to sales is having conversions. So we thought it was a good opportunity to take a look at the conversion rates of email marketing campaigns vs. those on social media. You might be surprised.

Source: Optinmonster

The Nine Most Popular Email Marketing SaaS tools of 2020

Hopefully, by now you are thinking, or maybe even considering, to invest some resources on an email marketing campaign. And if that is the case, we would like to help you make the first steps.

First of all, check whether your company is already subscribed to an email marketing tool. That is simple if you use Cledara; you can see that on your main screen and also who the subscription owner is. If you don’t use Cledara, there is no other way than spending some time asking around.

Second of all, you should know that not every email marketing tool suits your business needs. Let us explain. There are some amazing tools out there, but every one of them has its value proposition. In other words, every single one suits the needs of a specific customer. So you might want to get that sorted out first. But don’t worry, we’ve got you covered.

Thanks to our data team, we have elaborated a list of some of the best email marketing tools. And we have included a short description of every one of them. Remember, there are no winners or losers, just think which one fits your needs better.

Constant Contact

Constant Contact is a social media integration, drag-and-drop editing, and real-time reporting. It is a bulk email tool designed for SMB customers.


Mailchimp is ideal for startups and SMBs. Other than email marketing, we can consider Mailchimp a marketing automation platform.


Convertkit's email marketing software is perfect for bloggers and creators.


Activecampaign integrates its own CRM and it's recommended for small businesses.


Also a full marketing platform, Getresponse is considered one of the best email service providers. It has features like drag-and-drop email, landing page creator, advanced email analytics and more.


Sendinblue call themselves a solution for "relationship marketing." They do email automationa and outbound campaigns with a focus on deliverability.


If you have a low subscriber count, AWeber suits you well. It provides email marketing software that include newsletters emailing, autoresponding, and RSS-to-email converting features.


We couldn't leave Hubspot out of the list. They area one-stop-shop for marketing, sales (including a CRM) and customer service. So they are a good deal if you want one tool for all.

Email marketing software cloud by Salesforce

We included this one because it works especially well if your company is already integrated to Salesforce, that is why we included it in the list. Actually, this feature is a result of the Salesforce acquisition of ExactTarget in 2014.


As a bonus, Newoldstamp is an email signature generator that helps to standardize email sign-offs across the whole company and turn business correspondence into an effective marketing channel.

Save on email marketing software

Cledara has many benefits. But there is one of them that might come handy to you right now. As you may know, there are several tools that will earn you a cashback if you purchase them within the Cledara app. And actually, some of them are on this list!

Earn a 2% reward now in: Convertkit, Mailchimp, Activecampaign, Sendinblue

This analysis was inspired by questions provided by people like you. We love receiving new and interesting questions that help us think about data in new ways.  If you found this post interesting and have other questions that you’d like us to help answer, drop us a line at

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Jenny Liu
Head of Finance @ Marshmallow