Comics are an art form that consists of both artistic and textual expression. Initially, they appeared as an entertainment supplement in newspapers, and over time they became a separate medium. The thesis presents the development of publishing within which the foundations of today's comics were developed. The aim of the thesis is to determine the effects of digital technologies on the development, circulation, and distribution of comics based on the content available on two popular comic distribution platforms (ComiXology and Marvel Unlimited). The answers to the seven research questions were offered using the table research method. Research has shown that ComiXology offers users digital comics from a large number of publishers the same day printed comics go on sale, and Marvel Unlimited offers users a large catalog of exclusively Marvel comics dating back to the publisher's past, which would otherwise be hard to find. Comics are a faithful copy of their printed versions and as such cannot be adapted to readers who have difficulty reading or recognizing colors. The content on the platforms is mostly protected, and the platforms also differ in the way they charge for the service.