Constant Contact is an email marketing platform, used by more than 500,000 small businesses to build and deliver email campaigns to their customers. You can design, send and track emails with a simple set of tools and easy to use interface.

Sender is SaaS online platform, which helps for business and bloggers to grow sales with email marketing automation. It's the best tool to send automation newsletters, auto responder, reminders, follow ups and other type of emails to large email lists. Every user can use prepared email templates or create own design.

Omnisend is an omnichannel marketing automation platform built for eCommerce. With email marketing at its core, creating effective email campaigns is easier than ever before. Using Omnisend's marketing automation, you can personalize your message with customer data, campaign engagement, and shopping behavior. Omnisend allows you to add several channels into the same automation workflow: email, SMS, push notifications, Facebook Messenger, WhatsApp, and more.

Get a Newsletter is an easy and effective tool for newsletters and campaign emails. It gives you the opportunity to market your business and inform your customers about the latest news with just a few clicks. The service also provides you information about who opened the email and who followed the links in it.

Tightly integrated with WordPress, Cloud-powered email newsletter platform that lets you send emails via Amazon SES, SparkPost, Mailgun, SendGrid, Elasti Mail, or your favorite SMTP provider. A perfect email marketing solution for small to large businesses with large email databases. weMail will help you to send newsletters, collect leads, automated emails, display subscription forms, auto add subscribers to a list, and manage subscribers all inside the WordPress dashboard.

ZeroBounce is an email validation and deliverability platform that helps companies reach the inbox. Over 200,000 businesses reach their audience while protecting their data with military-grade security. Leverage a 98% accurate email validator, in-depth email scoring, and inbox delivery testing tools to improve your open rates and eliminate your email bounces.

GetResponse is a complete online marketing solution. It provides turnkey newsletter publishing and hosting features, as well as unlimited follow-up autoresponders, landing pages, webinars, marketing automation, and CRM to deliver information to your contacts and convert them to paying customers. Through responsible and fully automated list hygiene, anti-spam practices, and established relationships with major Internet service providers and email service providers, GetResponse prides itself on the highest possible email deliverability to ensure that your messages get through to your prospective customers.

MoonMail is an OmniChannel Service Provider and Marketing Platform where your support, sales, and marketing team can see the entire customer journey through a real-time dashboard. Use Messages API, Push Notification API, or the Chatbot AI API, are designed for handling an OmniChannel system. They are meant to help you deliver excellent customer experience through the whole customer journey. MoonMail, OmniChannel Center that allows you to switch between multiple channels.

iContact is a very popular email marketing / marketing automation platform. iContact has a very intuitive design and layout, making it very easy for businesses to design and deploy their own email campaigns. iContact comes with two different products; their basic email marketing platform, and their Pro Automation version of the product. 

Gmass is an email marketing plugin for Gmail. Gmass.co offers a great Gmail add-on, however the experience may lack of simplicity and the price is overall quite expensive. A Gmass footer is included by default in the free version of Gmass, which may denature your email campaigns.