where to find good ecommerce credit card processing comparison?

This is a trick question. Sadly there are no comprehensive list for credit card processing or for comparing merchant accounts. Most of the lists are either not accurate or just sales material.

Here are some lists we found which are credible:

United States:

TOP 4 MERCHANT SERVICES FOR SMALL BUSINESSES 2015 PayFrog

Malaysia:

Payment gateway integration options for start-ups in Malaysia Charge Bee

Latin America:

Top 10 Cross-Border Payment Services in Latin America Trulioo The best list is where you have people not selling you anything: th ebelow list is from an IT developer fourm and is meant for people doing payments integration. This list has more info in it than most professionally witten list out there. Definately my top recommended. One.

GItHub:

A few scrolls down: Supported Payment Gateways GitHub Merchant gateway feature Matrix on github GitHub