5 Best HR Outsourcing Companies for 2025

Deel is a global HR software and outsourcing company that serves organizations in the United States and all across the world. The platform runs payroll in over 100 countries, but you can also outsource your domestic and global HR functions with the company’s PEO and EOR offerings. Its PEO service is designed for companies within the US, while its EOR service offers global hiring, compliance, and payroll support.

Along with expert support, PEO and EOR customers can also access Deel’s software platform. One thing I particularly liked about Deel’s platform is how customizable it is. There are over 100 integrations to choose from, but you can also create your own with Deel API. Having your tech tools work together provides a smoother experience, so these integrations enhance Deel’s already intuitive platform even further.

Deel provides comprehensive and easy-to-use tools for processing or approving payroll, tracking compliance updates in different regions, managing IT and equipment needs, and engaging your team. With Deel’s PEO and EOR service, they’ll also handle the compliance matters associated with legal updates and payroll concerns.

Compliance outsourcing services

Deel offers expert support in local, state, federal, and even global compliance. Deel’s in-house experts can advise on a wide variety of legal concerns, including EEOC, ADAAA, ADEA, FMLA, COBRA, and CRA compliance. 

They can even help you build a compliant employee handbook and policies or draft compliant contracts and documentation. Additional compliance and risk management tools like employment practices and liability insurance and sexual harassment and discrimination training are also available.

Global HR outsourcing

Deel can also help you outsource global HR tasks, including global payroll, benefits, hiring, and immigration matters. Many of the vendors on this list focus primarily (or exclusively) on domestic services, but Deel has solutions for both US-based and global companies.

Deel’s EOR service is a top choice for global companies who want to outsource their HR and payroll functions. Deel can help you run payroll in over 100 countries and offer benefits like health insurance to international employees. They can also advise or manage more complex processes like employee relocations, visa applications, and navigating immigration requirements.

TriNet offers a wide range of HR outsourcing services, including ASO and PEO services and one-time audits. One standout area of TriNet’s services is its industry-specific advising. If you’re operating in an industry that has specific HR concerns, such as advanced compliance requirements, TriNet’s industry experts can provide more informed and tailored advice.

It also offers very thorough employment practices, risk management advising, and claims handling. They give proactive claims prevention advice, mitigation support, and coverage through employment practices liability insurance.

TriNet’s HR outsourcing services work alongside its HR software platform. While the platform looks a bit outdated—as newer programs tend to use more color on their dashboards and navigation menus—it still offers comprehensive features to support various HR activities, including payroll, benefits, and employee self-service.

HR advisory services

TriNet’s HR advisory service allows business owners to get help from HR experts in navigating tricky employee management and compliance issues such as:

• Terminations.
• Wage garnishments.
• Updating handbooks and maintaining compliant policies.
• Handling complaints or disputes.
• Understanding and adjusting to the laws in different states (or new rules).

You can reach out to assigned experts through phone or email to get personalized advice and compliance support in handling employee or policy issues.

Outsourced audits

Audits are a one-time HR outsourcing service that can give you an overview of your current payroll and HR compliance. TriNet’s expert team can identify potential liabilities in your current operations and policies and advise on how to correct these issues to improve compliance. Having an outside party with specialized expertise look at your payroll or HR processes helps you fix issues before a formal audit or claim arises through a government agency or other party.

Justworks offers HR outsourcing primarily through its PEO and EOR services. The outsourced HR service includes payroll, benefits, time tracking, expert compliance support, and access to the company’s software platform. 

The Justworks technology platform does a great job of displaying alerts prominently on the dashboard and offering clear, easy-to-navigate menus. For new businesses that want a minimal learning curve for their employees and administrators when choosing an HR service, Justworks is a strong option.

Justworks’ services are tailored towards new and growing businesses. Further, the company provides full-service support with HR consultants available to guide you as you navigate different HR and business challenges. It is one of the only HR outsourcing companies we reviewed that offers 24/7 support.

Benefits administration

Justworks earned a 4.63 out of 5 on benefits, making it tied for the top score in the category. Its PEO and EOR customers can access a wide range of benefits, including:

• Health insurance.
• Dental.
• Vision.
• Life and disability insurance.
• Mental health benefits.
• Commuter benefits.
• Fitness memberships.

This is a great way for new businesses to access top benefits at reasonable prices. You can also transfer your existing benefits plans and enrollments over to Justworks PEO if you’re already offering them through an eligible provider.

Risk management

Justworks can file W-2s, 1099s, and employer payroll tax filings. This is helpful for new businesses that may not have experience handling these filings or tracking their deadlines. The company can even offer assistance in creating and closing out tax accounts in different states as needed.

Justworks also provides employers with access to key risk management and compliance tools. Businesses can view workers’ compensation, state unemployment insurance, and employment practices liability insurance through Justworks’ PEO or EOR packages. Justworks also offers training resources like sexual harassment training to comply with state and local laws.

ADP has been in the business of HR services and software for a long time. While many of our top picks on this list are newer companies, ADP has been around since 1949. The company offers a wide range of services, both on the HR outsourcing front and through its software products. 

On the software side, ADP offers all of the standard HR features, such as payroll, benefits administration, and employee onboarding. Its platform can have a bit of a learning curve and feel a tad less modern than some of the newer software options, but its functionality is solid. 

In terms of HR outsourcing, ADP offers several different options to choose from depending on your organization’s needs. ADP TotalSource, its PEO service, can help you offload complex HR tasks like navigating compliance issues and government filings, as well as time-consuming administrative functions like payroll processing through a co-employment model. ADP also offers more traditional HR outsourcing with specialists available to advise on various topics such as payroll, tax, talent management, recruiting, open enrollment, and safety.

Recruitment process outsourcing

Having a clear recruiting strategy is important, regardless of whether you’re a small business or a large enterprise. However, many organizations struggle in this area. That’s why ADP’s recruiting outsourcing services can be very valuable.

ADP offers outsourced assistance in building or improving your recruitment strategy. They can analyze your needs and current processes to help craft a personalized strategy and teach your team how to create a passive recruitment pipeline to fill future needs. You can also get assistance in targeting different groups, such as graduating students, veterans, or people with specialized niche skills. They can also incorporate a DEI focus to ensure that your strategy is targeting applicants from diverse backgrounds.

ADP platform recruiting and hiring tools

Pairing the HRO services and platform can help you streamline hiring and improve your candidate experience. ADP’s expert services can work together with its software platform, which also offers solid onboarding and hiring tools. The standard ADP Workforce Now platform offers onboarding and hiring workflows that I found simple to navigate from the employer and employee sides. 

More advanced recruiting features are available through the ADP Talent Acquisition suite, including the ability to easily create a branded career site to post your open roles. The career sites are mobile-friendly as well, which is important because many job seekers search and apply on smartphones now. You can also access compensation benchmarking tools to ensure that you’re offering a competitive pay rate that will attract top candidates in your market.

Rippling is an HR outsourcing service that offers a wide range of services. At the core is the company’s HR platform, which won the top spot in our review of the best HRIS software vendors. 

The software platform and its interface earned high ratings in my review due to its intuitive and customizable nature. You can easily tailor your dashboard and set up custom workflow automations to make processes like onboarding and payroll processing quicker and easier. There are also over 600 integrations available to further customize your experience and get your various HR and communication tools working together seamlessly.

Rippling offers a PEO option for companies that want access to its health benefits plans and worker’s compensation coverage. This service runs as a co-employment option, meaning that your company and Rippling share employer responsibilities. Rippling’s PEO can handle benefits, payroll, and various compliance practices. The company also offers an EOR service, which, like Deel, can support international hiring and payroll. The vendor also offers an ASO service, which provides HR and compliance support services for companies that want expert guidance but are not interested in a co-employment model.

Payroll tax support

Running a multi-state payroll is a common HR challenge, especially in the current era of remote work, where many employers are hiring team members nationwide. Rippling can simplify multi-state payroll tax compliance by setting up and maintaining state and local payroll tax accounts in different states for you. 

In addition, Rippling automatically files your quarterly 941s, annual W-3s, new hire reporting, and state-specific tax forms. Rippling also has a network of HR and payroll advisors with specialized knowledge within different locations who can help you navigate payroll tax questions for different states or countries.

Payroll platform

Rippling’s well-designed payroll platform works hand-in-hand with its expert payroll support services to help businesses pay employees on time, wherever they are. Rippling can automatically calculate pay amounts, payroll taxes, and benefits deductions to ensure that you’re paying employees correctly based on their hours worked and the taxes in their location. You can also set up custom payroll automation to notify employees or payroll admins when needed. 

These tools are available to ASO, EOR, and PEO customers. If you decide down the road that you no longer want to outsource HR and payroll, you can also easily transition your Rippling subscription to a platform-only package to continue using these features.