We currently use Constant Contact, Topica and AWeber for our (and our clients’) email marketing campaigns. All three offer good service, reasonable pricing, great tracking tools and have been around long enough for me to feel comfortable that they’re not going to disappear overnight.
However, we recently started to move away from Topica towards Constant Contact, to the point where we’ve recently become resellers. In fact, we’re setting up all of our new clients on Constant Contact. (We still use AWeber, but I primarily use them for their autoresponder service, which I used to create the 7 Days to Search Engine Success e-course. We also continue to use Topica for the clients whom we set up there, and for one-time email blasts, such as "alert me when this site goes live.")
I chose Constant Contact for a few reasons, but mostly because we could create customized template "wizards". This allows us to design elegant HTML emails for our clients which they can use to send out their own newsletters. They can do this all through a Web browser, and not need to understand a lick of HTML. We weren’t getting this from Topica.
But here’s why I’m starting to get evangelistic about Constant Contact. Five minutes ago Kevin from Constant Contact called me to ask how the reseller program was working out for me. He had read the survey I completed and wanted to follow up on some specific issues that I had raised! He also told me about some new cool features that were coming out, but didn’t make me feel like he was selling it to me, more like he thought I should know. (The sign of a great salesperson.)
I’ve never received a phone call from Topica, and in fact, I don’t believe they have a phone at all. All their support goes through email. Not sure how they order pizza.
In any case, you can’t really go wrong with any of these outfits, but my vote goes with Constant Contact.