Comparison chart 

Below is an at a glance view of the most important features of the cart service. It's not a complete list of course, ten years of continual development has led to a very comprehensive system but these are the features most people ask about.

Main Content
Calculating orders
Free
Premium
Shipping calculator - 8 different methods
Yes
Yes
Tax calculator - 4 different methods
Yes
Yes
Sell your own gift vouchers, accept them for payment
Yes
Yes
Discounts tables
Yes
Yes
Integrated UPS, Fedex, USPS and Australia Post rate services
Yes
Advanced shipping: 20 zones, 6 options per zones, rate tables with up to 26 bands  
Yes
Unlimited product options that don't change the price
Yes
Yes
Quantity discounts for individual products
Yes
Yes
 
Payment processing
PayPal standard, PayPal Express checkout, Nochex, Skrill and Paymate
Yes
Yes
Define your own payment methods
Yes
Yes
Postal payment; MO and check
Yes
Yes
Third-party card processors (Linkpoint, Trustcommerce, Authorizenet, PayPal Pro, etc)  
Yes
     
Promote    
Issue your own discount coupons
Yes
Yes
Bulk upload of up to 5,000 discount coupons (for Groupon.com type promos)
Yes
Built-in tracking code for Google, Shopping.com, Bizrate, Miva, Overture and more
Yes
Yes
Built-in FREE mTracker affiliate program
Yes
Yes
Third-party affiliate programs
Yes
Yes
Google analytics
Yes
Yes
     
International
29 different languages
Yes
Yes
Setup up to 5 currencies
Yes
Yes
Three different numeric formats
Yes
Yes
     
Customize    
Responsive design which automatically adapts to mobile devices
Yes
Yes
Upload your own logo
Yes
Yes
Upload your own style sheet
Yes
Yes
Upload your own template for cart pages
Yes
Your own template for HTML email customer receipts
Yes
Yes
     
Order processing    
Batch download of new orders
Yes
Quickbooks integration with Traxian
Yes
Yes
Quickbooks integration with Webgility.com
Yes
Remote HTTP callback to your site when an order is received
Yes
Yes
Customized email customer receipts
Yes
Yes
Merchant order notifications to up to two addresses
Yes
Yes
Restricted Admin just for picking up orders  
Yes
 
General
Mobile webstores
Yes
Yes
No adverts
Yes
Yes
Unlimited products (excluding the downloadable goods)
Yes
Yes
Products sold for download on the internet
50
3500
Number orders per day up to:
30
150
Mal's e-commerce link in page signature
Yes
Friendly support forums!
Yes
Yes
More than 99.9% up-time over more than 15 years
Yes
Yes
Cost
FREE
$8 p/m