1909 The Old Post Office is built
The landmark federal post office is constructed at 119 S Main St in Saint Charles, Missouri, a building that would anchor the block for the next century.
About OPO Startups About OPO Startups
Built for the Saint Charles Community Since 2015
OPO Startups is more than a coworking space. It's a community built by a St. Charles native who believed this city had everything it needed to become a destination for entrepreneurs and innovators.
OUR STORY
From a 1909 Post Office to a 50,000 Sq Ft Innovation Campus
OPO Startups was founded in 2015 by Randy Schilling, a St. Charles native who had spent decades building technology companies on and around Historic Main Street. After growing Quilogy, a national IT consulting firm with hundreds of employees, and founding BoardPaq, a software company serving boards and leadership teams, Schilling turned his focus to something bigger: giving the Saint Charles business community the infrastructure it needed to grow.
His first step was converting the abandoned 1909 Old Post Office building at 119 S Main St into a coworking and innovation space. The response from the local business community was immediate. That original building has since grown into an 8-building, 50,000+ square foot campus spanning a full city block on Historic Main Street, home to dozens of startups, remote workers, and small businesses.
Randy's vision was never just a coworking space. It was a community anchor, a place where a software startup, a digital marketing firm, a solo remote worker, and a local retailer could all share a building and make each other better. That vision is what OPO is today.
"This is becoming the hub for not just the startups but also for the merchants on the street. It's collaborating with your local community, your street."
- Randy Schilling, Founder & CEO of OPO Startups
OUR MISSION
Building a Stronger Saint Charles County Business Community
OPO Startups exists to give entrepreneurs and businesses in St. Charles County the infrastructure, community, and resources they need to grow. That means affordable, flexible workspace. It also means something less tangible: an environment where a software startup, a digital marketer, a nonprofit, and a solo remote worker can all share a building and make each other better.
We partner with organizations like Lindenwood University, St. Charles Community College, the Saint Charles Main Street Foundation, and Confluence Tech Hub to bring educational programming, networking events, and mentorship opportunities to our members and the broader community.
FIND US
In the Heart of Historic Downtown Saint Charles
Address
119 S Main St, Saint Charles, MO 63301
Phone
(314) 328-4656
Office Hours
Monday - Friday, 8am - 4pm (appointment only)
Getting Here
Steps from restaurants, coffee shops, and the shops of Historic Main Street. Free private parking on-site. Easy access from I-70 and all of St. Charles County.
Section Tools
Hello
What is a Passkey?
Imagine signing into your account as easily as unlocking your phone—no more worrying about remembering or typing a password. A passkey is a secure digital key that uses the safety features in your device to keep your account protected. It’s designed to be both simple to use and highly secure.
Ready to experience a simpler, safer sign-in? Click the button above to create your passkey now.