GetResponse is an email marketing tool that helps businesses both maintain their contacts as well as coordinate professional marketing campaigns. It offers a very easy-to-manage database, users can create individual campaigns and manage multiple emailing lists within the software. GetResponse can also be used to build landing pages and surveys and publish newsletters on social media accounts such as Twitter and Facebook.

Mailjet is an all-in-one email marketing solution used for sending, tracking and delivering marketing and transactional emails. Some highlight features include its intuitive email editor (e.g. drag-and-drop and ready-to-use newsletter templates), personalisation, smart market segmentation, contact management, as well as a free plug-and-play email API.
Great flexibility: Email marketing can work for every business. It doesn’t matter whether you sell houses, lingerie, or consulting; you can get lots of sales if you use the right email marketing strategy in the right place. And you can promote practically anything relating to your business—you aren’t limited to sending links to your sales pages. Or rather, if your emails are just links to sales pages, you’re doing it wrong.
Not only is InVision's newsletter a great mix of content, but I also love the nice balance between images and text, making it really easy to read and mobile-friendly -- which is especially important, because its newsletters are so long. (Below is just an excerpt, but you can read through the full email here.) We like the clever copy on the call-to-action (CTA) buttons, too.
Another tool built by AppSumo, List Builder is an email marketing tool that helps you build up your mailing lists. It captures (engaged) visitors right before they are about to leave with pops that are triggered by clicks and timers. It is a very easy tool to use as it has a drag-and-drop functionality and features that can be customised to your brand.
Be responsive: Emails need to look good across multiple devices. With over 50% of emails being opened on mobile, this is more important than ever. Look out for single column templates and test to see if it looks good on desktops, tablets, and phones. At DirectIQ, we offer the ability to test and preview your emails before you send them to your subscribers.

Thanks for the article, it was also interesting and inspiring to see your other ventures in diverse fields. Would like to connect 1:1 in the near future. Meanwhile, even I had done a similar comparison as I myself handle email marketing for my organization. Do check it out as well as for the readers of the blog since it covers 2 additional players.
First of all, BuzzFeed has awesome subject lines and preview text. They are always short and punchy -- which fits in perfectly with the rest of BuzzFeed's content. I especially love how the preview text will accompany the subject line. For example, if the subject line is a question, the preview text is the answer. Or if the subject line is a command (like the one below), the preview text seems like the next logical thought right after it:
Presentation is everything, or so they say. With this old adage in mind, we’ve compiled our best tips for anyone who wants to send emails that subscribers click into a handy email design guide. We cover each facet of design: content, templates, identity, color, images, layout, fonts, and calls to action. Design is as much science as it is art, and we take the guesswork out of what can seem like the most challenging part of sending good emails.
While email is the most mature (that sounds better than “old,” right?) form of digital marketing, there’s no shortage of marketing technology innovation in this area. Both startups and established vendors continue to develop new capabilities for formatting, targeting, sending, and monitoring the impact of email messages, as well as functions like list building, inbox management, video email, deliverability, branding, custom email signatures and more.
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