Free Autoresponders are limited in functionality! Moreover, they don't allow to insert large email groups.

Contrary, paid autoresponder are more flexible in a way how you correspond with our recipients. Paid Autoresponders don't have inserted promotions in them Also the have large email groups capabilities. Some of them have implemented adds fro the adertisers in their sent emails to cover the operational costs!

They also have tracking systems in place and thus, can tell you some demographic data of the recipients, about their responses, how many recipients opened your emails, clicked on them, etc.

Paid autoresponders have better hosting in place, servers,the whole infrastructure behind, and have in general better support. They have also graphical advantage in sense of quality of the pre-made email templates professionally designed.

The price for paid autorepsonder vary. Some autorepsonders have fix prices but mostly the price is determinated according to the subsribers or contat numbers

It is up to you to check each of them and to decide what best fits into your budget and program.

Free Autoresponders obviously cost zero, nada, nothing! Paid Autoresponder can vary up to 1000$+ monthly. Red below about the costs!

The more or most expensive Autoresponders have obviously more feataures then the less expensive once.

They actually act also like the whole content and customer management systems, known as CRM (Customer Relationship Management). They are able to do much more as regular and basic Autoresponders which in an case also have more than enough features to satisfy normal needs of an online marketer.

For example, the CRM have inbuilt following features:

• whole sales funnel
• starting with landing pages, sales pages, website hosting
• payment processors
• tracking systems
• call possibilities
• and more

Glossary of terms:

"Customer relationship management(CRM) is an approach to manage a company's interaction with current and potential customers. It uses data analysis about customers' history with a company to improve business relationships with customers, specifically focusing on customer retention and ultimately driving sales growth.[1]

One important aspect of the CRM approach is the systems of CRM that compile data from a range of different communication channels, including a company's website, telephone, email, live chat, marketing materials, and more recently, social media.[2]Through the CRM approach and the systems used to facilitate it, businesses learn more about their target audiences and how to best cater to their needs."

Source: https://en.wikipedia.org/wiki/Customer_relationship_management