Discover the leading audit firms in the industry, renowned for their excellence and prestige. This list includes both the "Big Four" and other prominent companies, based on criteria such as revenue, reputation, and employee satisfaction. It is an essential guide for professionals and businesses seeking the most reliable and high-quality auditing services. Explore the options to make informed decisions about your accounting and financial needs.
Largest accounting firm in the United States by revenue
(+4)
Deloitte is one of the largest and most prestigious audit firms globally, consistently holding a leading market share position. Its assurance services leverage deep accounting and control expertise to deliver high-quality audits to businesses, including a significant number of Fortune 500 companies.
Named 2024 ",U.S. Audit Firm of the Year,"
(+4)
Grant Thornton LLP is a licensed independent CPA firm that provides attest services to its clients, excelling in audit and assurance expertise. It offers high-quality, efficient audits, coupled with assessments and perspectives for recognizing opportunities and avoiding risk. Its advisory teams tackle challenges alongside clients, designing fresh solutions with a balance of scale, skill, and service.
Second in revenue comparison
(+4)
PwC is renowned for its expertise in audit services, standing as a global leader in this field. The company provides high-quality, independent financial audits, offering clients critical insights and regulatory guidance.
Ranked among top accounting employers
(+4)
EY stands out for its high-quality audits that serve the public interest, promoting trust and confidence in capital markets. Its professionals execute with independence, objectivity, and professional skepticism, leveraging AI and advanced data analytics to enhance risk assessment and deliver distinctive insights.
Recognized as one of Fortune Magazine's 100 Best
(+4)
KPMG stands out for its advanced global smart audit platform, KPMG Clara, which leverages automation to deliver a risk-based, data-driven approach. Its extensive international presence across 142 countries and a team of over 236,000 professionals ensure unparalleled service capability and expertise in the audit sector.
All the rankings you can imagine
Thousands of verified votes to discover the best. Your vote here counts
Debuted in 71st spot on Fortune 100 Best Companies to Work For list in 2025
(+4)
BDO delivers assurance, tax, and financial advisory services tailored to the specific needs of its clients across various industries. Its focus on insight-driven perspectives and customized services enables companies to move beyond business as usual, achieving exceptional outcomes.
Ranked fifth largest accounting, tax and consulting firm in the U.S.
(+4)
RSM US LLP is recognized for its expertise in audit services, particularly for the middle market, and has been ranked among the top accounting firms globally. Its integrated approach and global network provide robust support for clients' audit needs. The firm has been consistently ranked on prestigious lists, including Accounting Today's Top 100 Firms.
Ninth largest accounting firm globally by revenue
(+4)
Crowe Horwath, now part of the Crowe Global network, is recognized for its extensive audit and assurance services offered worldwide. Its deep industry expertise and commitment to quality service delivery establish it as a key player in the sector. The network boasts a vast international presence and a team of highly qualified professionals who ensure compliance and excellence in their audits.