I haven’t heard of Feedblitz – just looking at their website now. Appears that they’re a Feedburner replacement specialising in RSS-to-email (sending your blog subscribers an email about latest posts). Their pricing looks a bit steep (considering Feedburner was free) – so I’d probably choose Mailchimp or Aweber over them? That way you can message up to a few thousand people free of charge.
With Vero, users can track and store customer data and events in real-time. Using this information, you can create segments without having to do any coding and send out automated emails. For example, users who have just abandoned the shopping cart can be targeted with an email just hours or days later. In terms of deployment, Vero can be integrated with an email delivery provider, such as Sendgrid.
Constant Contact is a fairly experienced email marketing tool, with nearly 20 years experience in the industry. Customers can take advantage of professional (and mobile optimised) email templates, various customisation options, easy set up and engagement-driving action blocks. This software also includes list building tools, automated welcome emails, contact list segmentation, and email tracking.