Winmill builds and secures modern enterprise systems
For three decades, organizations across North America, from growing companies to the Fortune 100, have trusted us to build the custom software their business runs on, then modernize and defend it.
Enterprise software, built and defended
For three decades Winmill has developed custom software for the enterprise. Today our four practices carry that work from the first idea to production on Azure, and keep it secure.
AI Solutions
We turn your operations and unstructured data into intelligent workflows on Azure AI, Fabric, and Foundry, so your team spends less time hunting and more time deciding.
Explore AI solutionsAzure & App Engineering
We build custom software and run it on Azure: mission-critical enterprise applications since 1994, from multi-year systems to rapid MVPs, with the delivery pipelines and cloud migration to keep them running.
Explore Azure and app engineeringCybersecurity
We find and fix weaknesses before attackers do, through penetration testing, application security, and cloud security.
Get continuous securityData Center & IT Support
We keep critical systems running through managed IT and disaster recovery hosting in an audited enterprise data center.
Talk to an IT advisorFrom mid-market to the Fortune 100
Winmill serves organizations across North America, including 44 of the Fortune 100. Our work is concentrated in industries where reliability and security carry real consequences.
Financial services
Penetration testing and secure development for banks, insurers, and credit bureaus.
Healthcare & medical devices
Tested devices, secure applications, and compliant infrastructure for regulated care.
Benefit funds & labor organizations
Member platforms and hosted systems for funds and unions nationwide.
Education & online learning
Applications that scale from the campus to millions of learners.
Government & critical infrastructure
Continuity planning and secure systems for agencies that cannot go down.
Media, sports & professional services
Modern platforms for leagues, agencies, and consultancies.
Three decades of building dependable systems
Founded in 1994, Winmill is a technology services firm headquartered in New York City. For three decades we have helped enterprises move through each shift in technology, from client-server to cloud to the AI era, while keeping their systems dependable and secure. That work has earned the trust of 206 of the Fortune 500.
Today we design and build modern applications on Azure, harden them through dedicated penetration testing and application security work, and run the managed IT and data center services that keep them resilient. We tell clients what we will do and then we do it, staying in close communication from kickoff to handoff.
What sets us apart
Plenty of firms can build enterprise software. Enterprises choose Winmill because we also test it against real-world attacks, defend it, and run it.
We build it and we secure it
Most firms hand security to a third party. Our engineers and our penetration testers work the same systems, so nothing slips through the seams between vendors.
Depth in four disciplines
We run dedicated practices in AI and Azure, cloud engineering, cybersecurity, and managed IT, each led by senior people who have done this work for years.
Software built to last
Since 1994 we have built enterprise systems that clients still run today. Our largest clients return for project after project, because we engineer software for the long haul, not just the launch.
Our own infrastructure
We own and run the infrastructure behind our systems, in a SOC 1 and SOC 2 audited, ISO 27001 certified facility.
What clients say about working with us
Winmill delivered high-quality work within our timeline and budget. Their team was responsive, professional, and helped us launch successfully.
They do a really good job of sticking to timeframes, communicating consistently, and being responsive to our concerns. They adapt to our tech stack and provide value almost immediately.
We were very impressed with your penetration testing team, their approach, their results, and their documentation. They are very easy to work with.
Frequently asked questions
What services does Winmill provide?
Winmill has developed custom enterprise software since 1994. Today that work spans four practices: Custom Software Development, AI Solutions, Cybersecurity including penetration testing and application security, and Data Center and IT Support. Together they cover building, modernizing, securing, and operating the systems your business runs on.
Who does Winmill work with?
We serve organizations across North America, from mid-market companies to 44 of the Fortune 100. Our clients are concentrated in financial services, healthcare and medical devices, benefit funds and labor organizations, education, government, and media.
Is Winmill a Microsoft partner?
Yes. Winmill is a Microsoft Solutions Partner for Modern Work and a Microsoft Cloud Solution Provider. Our teams build and deliver on Azure, Microsoft Fabric, and Azure AI Foundry every day.
Does Winmill run its own infrastructure?
Yes. Winmill owns and operates the infrastructure that runs its systems and the eMembership platform, in a SOC 1 (SSAE 18) and SOC 2 audited, ISO 27001 certified facility with redundant power, networking, and around-the-clock on-site staffing.
How long has Winmill been in business?
Winmill was founded in 1994 and is headquartered in New York City. Over three decades we have served more than 5,000 clients and maintain a 97% client retention rate.
How does an engagement with Winmill begin?
It starts with a conversation. Tell us what you’re working on and we’ll connect you with the practice lead who fits your project. From there we scope the work together before anything is committed.
Put thirty years of enterprise delivery to work
Tell us what you’re working on and we’ll connect you with the right team.