Which email marketing tool is most widely used, and why?

Most people will mention Mailchimp as the most widely used email marketing tool because it is simple, has a free plan, and has been in the market for a long time. It became popular with beginners, freelancers, and small businesses that wanted an easy way to send campaigns.

? But here’s the problem: When businesses grow, they often need to send large volumes of emails, connect multiple sender accounts, and reduce bounce rates. This is where traditional tools like Mailchimp or similar platforms show clear limits — especially for agencies, cold outreach, or bulk email users.

Why many switch to AtomEmailPro

AtomEmailPro is built for marketers and agencies who need more than just basic newsletter sending. Compared with “widely used” tools, it solves real cold email problems:

Supports multiple sender accounts – You can manage many SMTP accounts (Gmail, Outlook, custom domains, etc.) in one place.

High deliverability – Smart sending system reduces spam flagging and increases inbox placement.

No sending limits like traditional tools – Perfect for 10K+ campaigns, bulk sending, and outreach at scale.

Cold email ready – Unlike standard platforms that ban cold emailing, AtomEmailPro is designed to support B2B outreach and agency use.

Affordable for scaling – Pricing is more flexible than most mainstream tools when you need higher volumes.

? In short: While Mailchimp is the most widely used because of history and brand, AtomEmailPro is the smarter choice if your goal is serious cold outreach, multi-account management, and scaling email campaigns without the usual restrictions.

There are several popular email marketing tools used by teams today, including SMTPmart, Mailchimp and Sendinblue. The choice often depends on the team’s specific needs like budget, email volume, and technical requirements.

SMTPmart is commonly chosen by teams that need reliable email delivery and support for bulk email sending. It's known for being simple to set up and works well for transactional and marketing emails alike.

Drip is a powerful email marketing platform for eCommerce, bloggers, and digital marketers. They offer a wide range of tools to make marketing automation and personalization easy.

They offer seamless integration for all popular website builders including WordPress and WooCommerce. This allows you to easily add sign up forms to your website and capture more leads.

What sets Drip apart from the competition like Campaign Monitor is their intelligent marketing automation tools, smarter email segmenting, list groups, and a visual workflow builder. These features allow you to reach targeted customers in your email list to get more sales.

Support options at Drip include live chat support, webinars, automation training, detailed courses, free guides and excellent documentation.

We use Drip for several of our businesses because it allows us to send bulk emails while connecting and engaging with every customer on a personal level using their smart eCommerce marketing automation.

Even though it’s a bit pricey, we believe Drip is the best email marketing software for eCommerce websites and business owners who want more advanced features.

Drip offers a free account for up to 100 subscribers. After that their plans starts from $49 / month which includes all their features.

Constant Contact is one of the largest and fastest growing email marketing service in the world. It is also the most easy to use and beginner friendly email marketing service. You can easily manage your email lists, contacts, email templates, marketing calendar, and more. Each account gives you access to easy tracking and reporting, built-in social media sharing tools, free image library, list segmentation, Facebook ads integration, and a powerful eCommerce integration for Shopify stores. Their Email Plus accounts also come with powerful features like email automation, surveys & polls, coupons, online donations, and subject line A/B testing which helps you send targeted emails to maximize your open rate. Constant Contact offers unmatched support with live chat, phone calls, email, community support, and a vast library of helpful resources. Aside from online training, they also offer in-person live seminars across the United States. This allows small businesses to quickly learn the basics of email marketing and start using it to grow their business like a pro. For all the reasons above, we rate Constant Contact the best email marketing service for small businesses. Constant Contact has a 60-day free trial (no credit card required). After that their pricing starts as low as $20/month. WPBeginner users can use our Constant Contact coupon code to get an additional 20% off.

The most popular email marketing platform out there is Mail Chimp, this is because they offer a simple and easy solution with great open rates.

One key thing is to make sure your data is clean before using a platform like Mail Chimp to make sure you have a low bounce rate as anything over 3-4% will result in your account be closed.

You should run any marketing lists you have through a trusted email verification provider like Email Checker before marketing to them.

This will ensure your lists are clean, which will, in turn, improve your sender reputation, email deliverability, and inbox placement.

You can create a free trial account with Email Checker here: login.emailchecker.com

Also if you enter CHECKER10 at checkout you will get a 10% discount off your order.