Transport and telecoms companies ranked among the worst this year.
A Laois-owned retailer has been ranked second best for customer satisfaction in Ireland this year.
The annual CX Company survey shows Shaws Department Stores - which has three outlets in the midlands - has jumped 14 places and is now second only to the Irish Credit Union.
An Post, Specsavers and Allcare Pharmacies complete the top five.
Meanwhile, online order and food delivery companies, including Amazon and Just Eat, tumbled down the rankings.
Author of the report, Cathy Summers, says businesses with staff on the frontline performed well:
Author of the report, Cathy Summers, says a number of big companies didn't do well this year:
Online order and food delivery companies saw a sharp drop in customer satisfaction this year.
The likes of Oxendales, Amazon, Just Eat and Deliveroo tumbled down the rankings.
Telecoms companies like Eir and Vodafone, and transport companies like Ryanair, Aer Lingus and Bus Éireann were among those that performed poorly in the study.
Ms. Summers says businesses with staff on the frontline performed well: