The List of Companies with Autoresponders
Alstrasoft Autoresponder Pro - This is supposed to allow you to create your own autoresponder service. Unfortunately, a lot more goes into an online service that others rely on. Don't know anyone who has tried it.
AWeber - This is a popular online service providing autoresponder services for many years.
Benchmark - A newer online service. I have not tried it yet but it looks promising.
Dirt Cheap Autoresponder - An autoresponder script you own and install on your websites.
EZ Response - What can you say about a service that advertises other autoresponders on its sales page?
Gammadyne - The software is downloaded to your website. It is regularly updated, but do not know of anyone using it.
GetResponse - Another online service that has been around forever.
Infusionsoft - Expensive and targets brick and mortar business owners. The service is actually not that great.
Mailchimp - This service is discussed online because of a limited free option. You can't market with it so don't waste your time and energy. And no actual autoresponders are allowed in the free version.
Promasoft - Last updated in 2007. Don't bother.
Royal Responder - One of the first online services, there is no reason to use this instead of AWeber or GetResponse.