Mediocre delivery; some users have reported disappointing deliverability issues with Constant Contact
Straightforward to use; easy setup and maintenance
Analytics do not stack up to other providers and their analytics offerings
Generally standard features between scheduled sending, segmentation, etc. Along with VerticalResponse, offers good integration with both event marketing and social media marketing
Customer support feels as out of touch as with large public companies; disappointing compared to how fanatical customer support teams can be very helpful; free plans and paid bundles start from $15
VerticalResponse follows the same practice as other leading email marketing providers: feedback loops, unique IPs, Anti-SPAM compliance
VR offers industry-standard analytics with respect to deliverability, clickthroughs, and more.
VR is somewhere between the super simple platforms and the complex email marketing providers. It provides a lot of integrated tools and functionality, but it is not as quick and easy as competitor products like MailChimp.
VerticalResponse is probably one of the most robust providers with the most extensive feature set. It allows hard, technical functionality like selling tickets to an event through their email platform, to more aesthetic challenges, like crafting unique action buttons to become very simple actions.
Not especially known for its customer service; lacks a free plan to compete with companies like MailChimp, but on a per-email basis, far cheaper than others, starting at around $0.015/email - which is less than half of what MailChimp charges under some of its plans