How they do it: Initially, Ryanair did not offer customers the possibility of contacting them by email or webform, only through a premium rate phone line, by fax or by post. Also, customers are directed to self-check-in terminals or online check-in – if they opt to check in at the airport, they are liable to a $45 surcharge. On the flight, no food and beverages are distributed, they must be purchased on demand, further reducing customer service and customer interaction expenses.
Learn more about Ryanair →

How they do it: AWS cloud computing can be set up by every business independently without needing to talk to a AWS representative. Extensive tutorials and documentation help the customers to act and use the service as independent as possible. However, in case support is needed, AWS has it available.
Learn more about Amazon Web Services →

How they do it: IKEA stores have three main areas, the exihibition area, self-service area, and warehouse. Products from the self-service area are grab and go articles. Larger products and furniture is presented in the exhibition area and numbered. The customer then has to pick-up the individual parts of the furniture according to the numbers in the warehouse area and proceed to the check-out.
Learn more about IKEA →

How they do it: As part of a 2018 effort to redesign its stores, Subway introduced self-service ordering kiosks in select locations. These enable customers to order their sandwich via a touchscreen on a kiosk located in the store.
Learn more about Subway →