Examples of this include things such as instant messaging (IM) and team chat tools, video conferencing software, online meeting collaboration tools, shared team intranet sites, and more. Some even integrate with third-party tools such as Slack, a highly popular collaboration tool that combines customizable chat "channels" with file sharing and project management. For those who want to integrate with certain apps more deeply or integrate with custom-developed apps they have built in-house, many bigger-name email services will provide robust application programming interfaces (APIs) that will let your in-house developers or consultants deliver on those needs. They will need to be involved in the email service selection process, however, as this is an important consideration during your evaluation period.
Things are probably more complicated than that, though. As a recent survey conducted by market research firm Statista clearly shows, email is one of the most popular apps for mobile devices across most organizations and even consumers. Given how many workflows, business processes, and just plain important communications take place over email, this is one area where you likely shouldn't skimp.
Professional email marketing software offers you the tools to track results so that you can better understand customer behavior. This allows you to set customized messages, as well as to A/B test your messages so that you can constantly fine-tune your marketing campaigns. Let’s say, for instance, that you want to find out which is the best auto-responder for your high-rolling segment of customers. You can set different options, compare auto-responders, and make an informed decision. Sendinblue also features marketing automation, and its wealth of plugin capabilities make it easy to maximize your email campaign.
Klaviyo allows e-commerce marketers to target, personalize, measure, and optimize email and Facebook campaigns. Businesses can define their font and brand colors, and Klaviyo will automatically apply them to built-in workflows and any new templates. You can also create new templates based on different pre-built layouts. Other features include one-click integrations, ROI-based reporting, segmentation, autoresponders, personalization and responsive templates.
ProtonMail was founded in 2013 by scientists who met at CERN and were drawn together by a shared vision of a more secure and private Internet. Since then, ProtonMail has evolved into a global effort to protect civil liberties and build a more secure Internet, with team members also hailing from Caltech, Harvard, ETH Zurich and many other research institutions.

“Third, tell me how it benefits me. I’m very very active in my charity work, but your startup is not a charity…”We thought you’d enjoy meeting young entrepreneurs” – bzzzzt. I DO enjoy meeting young entrepreneurs, I do it all the time as a matter of routine at conferences and through friends and so on. But if you’d like more than a friendly pat on the back and encouragement, then treat me like a businessperson – let’s find something that’s mutually agreeable. “If you could join us as an advisor, we’d be able to compensate you with stock options in a quantity appropriate to our stage of development.” – yay.”
Free email services do cap the number of email messages you can send out per day. This is to cut down on spam messages sent with their services. The cap is generally around 100 messages per day, which is sufficient for keeping in touch with family or other personal email uses. But if you need an email service for business purposes, it may be better to purchase an email service that permits unlimited messages each day.
Moonmail is great platform that utilizes Amazon SES  – which means you are only paying for what you send (vs. subscribers in your account), making it at cost effective solution for small businesses. With a powerful drag and drop editor, deep analytics, and built-in heatmaps (so you can see what content is working) all under a clean and easy-to-use interface, it’s a excellent choice to scale your email marketing needs.
Design: Most survey software allows you to arrange your questions and tweak the layout. However, the best survey platforms offer additional tools to make your surveys visually appealing and are designed to promote your brand. Our best pick, SurveyGizmo, offers customizable templates in all its paid plans and individual URLs in the higher-priced plans. 
You can attach files up to 25MB and upload more than one at a time. Once they are attached, documents and images are displayed as thumbnails, so it’s easy to verify you’ve attached the correct files. When you receive attachments in an incoming message, these, too, are displayed as thumbnails so you can preview and sure they are safe to download to your computer.
The Elite Email cloud-based platform allows organizations of all sizes to build and grow their mailing lists, create emails, and track results with detailed reports and analytics. There's nothing to download or install with the software. With Elite Email, businesses can choose from more than 400 customizable templates to create email newsletters, promotions, announcements and coupons.
Robly's OpenGen technology utilizes a traditional email campaign process; however, OpenGen then resends your campaign one to 10 days later, with a different subject line to those subscribers who didn't open the first campaign. The system sends emails one at a time, at the moment subscribers are most likely to check their inboxes. The service features A/B testing, a pop-up widget to increase contacts and mobile-responsive templates. 
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