Top 100 HR Service Providers in the United States

HR company HR Unlimited, Inc. Was launched in 2001. Their small team is located in Santa Ana, California and provides HR services.

Teamswell is a finance & accounting outsourcing (FAO) company. They specialize in finance & accounting outsourcing (FAO), web development, accounting, customer service outsourcing, and more and were launched in 2020. The company is based in Truckee, California.

Aerotek is a global recruiting and staffing agency based in Chicago, with other offices in Baltimore, Detroit, and Canada. Since their start in 1983, the company has grown into a team of nearly 20,000 HR consulting and outsourcing specialists.

Adecco is an HR solutions company based in Zurich, Switzerland, with additional offices in the United States, France, Italy, Spain, and India. It was founded in 1996 and currently employs a team of 33,000 specialists who exclusively provide HR consulting and outsourcing services.

Abel HR is a professional employer organization based in Cranbury, N.J. with offices in New Rochelle, N.Y. and Santa Ana, Calif. Founded in 1992, they have a team of about 30 that exclusively works with those in the financial sector. They specialize in HR consulting and outsourcing services.

Ahead Human Resources is an HR services company based in Louisville, Ky. It was founded in 1995 and now has a team of 23 that provides HR consulting and outsourcing services for clients in the business & financial industries. 

Aon is a professional services firm located in Chicago, with additional offices in New York City and London. With a team of nearly 60,000 employees, the company mainly provides HR consulting and outsourcing services to clients in the healthcare, finance, and entertainment industries.

Kelly Services is a human resources outsourcing firm headquartered in Troy, Mich., with 15 global offices throughout the US, Europe, and Asia. Established in 1946, Kelly Services has grown into a team of over 10,000 employees. Their services revolve entirely around HR consulting and outsourcing. Kelly Services partners with a diverse client base that includes prominent global firms.

CRG | Search Staffing Solutions is a human resources agency. They are in San Jose, Costa Rica and have a midsize team. The firm specializes in HR services, accounting, non-voice bpo/back office services, IT managed services, and more.

Human resources agency Labor Max Staffing is based in Phoenix, Arizona. The midsize team provides HR services and accounting. The agency was founded in 2002.

VantagePoint Benefit Administrators is a small insurance services & brokers company. They offer insurance services & brokers, HR services, and financial advising & planning and were established in 1994.

Orange Grove Consulting, a corporate training company, was founded in 2013. They are headquartered in Newton, Massachusetts; Austin, Texas and El Segundo, California and have a small team. Their services include corporate training, business consulting, and HR services.

Blueprint Apps is a software and staff augmentation company founded in Scottsdale, Ariz. with no more than 10 employees. Since their founding in 2013, they have offered IT staff augmentation, mobile app development, and web development solutions to various clients.

Chernoff Diamond is a benefits and risk management advisory firm based in Uniondale, NY. Founded in 1980. they have a team of about 100 employees who provide HR consulting and outsourcing services.

Core Matters, LLC, founded in 2011, is a recruitment marketing agency headquartered in Phoenix. Their 3 employees mostly provide business consulting and marketing strategy services. They work with both mid-market and small businesses in a variety of industries including manufacturing, and hospitality & leisure. 
 

Based in Portland, Network Redux is a managed services provider that was founded in 2004. Their team of 35+ specializes in cloud consulting & SI and HR services. 

Capital Services, Inc. is a business agency based in Towson, Md. with more than 10 team members. They have offered business consulting and HR services since their founding in 2012.

Franchise Beacon is a sales, development, and management company in Irvine, Calif. Founded in 2008, they have about 5 employees that do business consulting, email marketing, and HR consulting and outsourcing. Clients are in the HR sector exclusively. 

Located in Boston, Massachusetts, Zintro is a midsize market research company. They offer market research, HR services, and business consulting and were established in 2007.

Headquartered in Chicago, DHR International is a staffing agency with offices around the world. The team of over 650 specialists focuses on HR consulting & outsourcing for clients primarily in the arts, business, and financial industries. The company was founded in 1989.

The Segal Group is an HR firm headquartered in New York with service centers all over the country. Since it was founded in 1939, the firm's team has expanded to a current group of 126 employees. The Segal Group provides HR and benefits consulting as well as outsourcing services. Most of their clients work in the government and business sectors.

Boyden is an executive search firm based in Summit, N.J., with additional offices in Chicago, San Francisco, Pittsburgh, Atlanta, and Houston. Founded in 1946, the company now employs just under 1,000 HR consulting and outsourcing specialists.

N2Growth is a executive search company. Founded in 2006, the team focuses on executive search and hr consulting. Their midsize firm is King of Prussia, Pennsylvania-based.

Navigate The Journey is a business leadership consulting firm based in Brentwood, Tenn. Founded in 2015, their team consists of fewer than 10 employees that provide HR, consulting, and leadership training services.

Worldwide 101 is a virtual assistant company headquartered in New York City with offices in Los Angeles, France, and Northants, UK. Founded in 2009, they have a team of about 100 that provides voice and non-voice BPO/back office services.

New City Insurance is an insurance services & brokers company launched in 2010. They are located in San Diego, California and have a small team. Their services include insurance services & brokers and HR services.

Perkins & Co is an accounting firm based in Portland, Ore. They have a team of around 200 teammates and were founded in 1986. They provide business consulting, tax preparation, and HR services. 

The Penguin Group is a business consulting company. They are based in Montebello, New York and have a small team. Their services include business consulting, recruiting, CRM consulting and SI, and corporate training. The agency was founded in 2021.

Alliant Employee Benefits is a consulting firm headquartered in Newport Beach, Calif; they also have an office in Spokane, Wash. Founded in 1925, Alliant Employee Benefits has at least 1,000 employees that serve a range of businesses in a variety of sectors. 

PrideStaff is headquartered in Fresno, Calif. with offices across the United States. Since 1978, their team of about 1,500  work with a variety of clients in different industries including business services, financial services, and healthcare.  They specialize in HR consulting and outsourcing.