The industry of US credit repair companies is one that is both complex and rapidly evolving. As we delve into the dissection of this industry, we will be exploring a number of key findings and insights that provide a comprehensive picture of its current status and future trajectory.

To begin with, it is incumbent on us to delineate the functions of a credit repair company. These organizations offer services aimed at improving a person's credit score, either by identifying errors in credit reports and disputing them, or by suggesting strategies for repaying debts and managing finances. In essence, they function as a conduit between consumers and credit reporting agencies, facilitating better financial health for individuals and contributing to a more robust economic climate.

However, it is prudent to mention that not all credit repair companies operate in good faith. As elucidated by Federal Trade Commission regulations, these companies are prohibited from charging customers until they have fulfilled their promised services. Nevertheless, there exist companies that blatantly flout this rule, leading to a proliferation of fraudulent activity in the industry. Thus, understanding the regulatory framework is pivotal for any in-depth analysis of the credit repair industry.

Recent data from IBISWorld reveals that the credit repair services industry in the United States has grown by 3.8% in 2021, accumulating a total revenue of $3 billion. This growth is fueled by several factors; most notably, the rising aggregate household debt, which reached $14.64 trillion in the first quarter of 2021 according to the Federal Reserve Bank of New York. As debt levels increase, so does the need for credit repair services, a trend that is reflected in the industry's growth.

Further, the CFPB (Consumer Financial Protection Bureau) reported a 54% increase in the number of complaints related to credit repair companies from 2019 to 2020. This can be considered as a reflection of both increased industry activity and greater consumer awareness about their credit rights.

As we venture into the technological dimension of this industry, we find an increasing number of credit repair companies leveraging machine learning and AI tools to automate parts of their services. This has the advantage of improving efficiency and scalability of services, but it simultaneously raises concerns about data privacy and accuracy of automated dispute filings.

The geographical distribution of credit repair services is also an interesting aspect of this industry. Certain states, such as Florida and California, have a higher concentration of credit repair companies due to their larger populations and higher incidence of credit problems. However, the advent of digital platforms has made credit repair services more accessible to consumers across the nation.

Looking ahead, it is reasonable to speculate that the industry's growth trajectory will continue to be influenced by macroeconomic indicators like household debt and unemployment rates. Any legislative changes in the regulatory environment could also have significant impact, as would advancements in AI and machine learning technologies.

In conclusion, the US credit repair companies industry is an intricate tapestry woven with threads of economics, law, technology, and geography. It is a dynamic landscape that continues to evolve in response to societal needs and technological advancements. Understanding its workings not only provides insights into the industry itself, but also offers a unique window into larger themes of consumer behavior, economic health, and technological progress.