We are a leader and an innovator in the high growth category of technology-enabled services platforms that empower consumers to make healthcare saving and spending decisions. Our platform provides an ecosystem where consumers can access their tax-advantaged healthcare savings, compare treatment options and pricing, evaluate and pay healthcare bills, receive personalized benefit and clinical information, earn wellness incentives, and make educated investment choices to grow their tax-advantaged healthcare savings. We can integrate with any health plan or banking institution to be the independent and trusted partner that enables consumers as they seek to manage, save and spend their healthcare dollars. We believe the secular shift to greater consumer responsibility for healthcare costs will require a significant portion of the approximately 191 million under-age 65 consumers with private health insurance in the United States to use a platform such as ours.
The core of our ecosystem is the health savings account, or HSA, a financial account through which consumers spend and save long term for healthcare on a tax-advantaged basis. We refer to the HSAs for which we serve as custodian as our HSA Members. As of January 31, 2019, we were the integrated HSA platform for 141 health, retirement and other benefit plan providers and for employees at more than 45,000 employer clients. Our customers include individuals, employers of all sizes, and health, retirement, and other benefit plan providers. We refer to our individual customers as our members, our health, retirement and other benefit plan provider customers as our Health Plan and Administrator Partners and our employer clients as our Employer Partners. Our Health Plan and Administrator Partners and Employer Partners collectively constitute our Network Partners. As of January 31, 2019, we had approximately 4.0 million HSAs on our platform. Management estimates that this represents approximately 8.8 million lives. During the years ended January 31, 2019, 2018 and 2017, we added approximately 679,000, 723,000 and 703,000 new HSA Members, representing approximately 1.5 million, 1.6 million and 1.5 million lives, respectively.
We have developed technology and a differentiated focus on the consumer to facilitate the transition to a more consumer-centric approach to healthcare saving and spending. Our solution is deployed as a cloud-based platform that is accessible to our customers through the Internet and on mobile devices and is hosted on private servers, which allows us to scale on demand. Core to our technology is a configurable framework and open platform that we believe provides us greater functionality and flexibility than generic technologies used by our legacy competitors and requires less investment and time to configure and customize to our customers' needs.