Justworks is a PEO, which stands for Professional Employment Organization. The software is the tool you use to administrate most of your company's activities with the PEO. PEO's come in various business models, but here is the way to think about them: if you are a small business that wants to outsource payroll AND a full set of benefits (health insurance, 401K, dental insurance, workers comp, short term disability, long term disability, paid holidays, paid time off) to your full-time employees), one of your best options is to use a PEO. For payroll, tax and benefit purposes, Justworks becomes the "employer" of your employees. You remain the employer in terms of hire/fire/train/ performance appraisal. You select what benefits you want to offer, and have fairly good flexibility on whether you want the "gold plated" benefits or the "just good enough" benefits or something in between. As the employer, you pay roughly $80 - $99 per month per full time employee for payroll services, plus the cost of the benefits you choose to provide to your employees. As a very small business, using a PEO was by far the best option for me to provide big-company benefits.
When I shopped about two years ago, Justworks was by far the best AND lowest cost option. Justworks customer support (think of them as your Human Resources department for benefits and payroll) is top notch. We get answers to our questions within a few hours, and have always gotten satisfactory responses to issue. Their payroll service has always been satisfactory, and they allow my company to offer "big company" benefits.
I really have no complaints about Justworks. When I was shopping for PEOs, I found lots of nightmare reviews of all the other PEOs I found. The large payroll companies also have terrible reviews. I never found a bad review of Justworks, and now I know why. They are a great service provider. The only way I can imagine leaving them is if my company grows so large that it makes sense to have an internal HR and payroll department.
Value for money
Ease of use
Likelihood to recommend: 10/10