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View ProACT Partnership's top competitors like Alight Solutions, Aon, and Castlight Health.

Optum
We’re evolving health care so everyone can have the opportunity to live their healthiest life. It’s why we put your unique needs at the heart of everything we do, making it easy and affordable to manage health and well-being. We are delivering the right care how and when it’s needed; providing support to make smarter and healthier choices; and making prescription services easier, while helping you save money along the way. It’s everything health care should be. Together, for better health. Optum is part of UnitedHealth Group (NYSE: UNH).
Eden Prairie, Minnesota, US
Private
$226.6B Revenue
https://www.optum.com/en/
115K Employees
Mercer
At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people. As a business of Marsh, for 80 years, we’ve been helping our clients, colleagues and communities build the confidence to thrive, creating healthier and more sustainable futures. Together with Marsh Risk, Guy Carpenter, and Oliver Wyman, we help organizations build resilience and competitive advantages from every angle. With annual revenue over $24 billion and more than 90,000 colleagues in 130 countries, Marsh helps build the confidence to thrive through the power of perspective.
New York, New York, US
Public
$5B Revenue
http://www.mercer.com
21.8K Employees
MMC Ticker
Alight Solutions
Alight is a leading benefits administration provider of health, wealth, leave and point solutions for many of the world’s largest organizations and over 30 million people. Through the administration of employee benefits, Alight helps clients gain a benefits advantage while building a healthy and financially secure workforce by unifying the benefits ecosystem across health, wealth, wellbeing, absence management and navigation. Our Alight Worklife® platform empowers employers to gain a deeper understanding of their workforce and engage them throughout life’s most important moments with personalized benefits management and data-driven insights, leading to increased employee wellbeing, engagement and productivity. Learn more at alight.com.
Deerfield, Illinois, US
Private
$2.3B Revenue
https://www.alight.com
11.3K Employees
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
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