OPO Startups is a place where entrepreneurs can connect, work and collaborate.

Now Open

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OPO is a co-working center for digital Startups. Located in the newly renovated “Old Post Office” building, the 10,000 square foot facility provides regional startups with affordable workspace and access to mentors, potential investors, programming, educational resources and a community of local entrepreneurs.

Our Mission

To promote and grow the regional digital startup community in St. Charles.

Are you looking for a community to help you create structure and discipline that will motivate you?

Meet our Members

Are you looking for a conducive environment to grow your company?

5:30 PM - 8:00 PM



These monthly gatherings are for local entrepreneurs to meet one another in a collaborative environment over pizza and beer.



Stories and conversations with accomplished founders from the Saint Louis Region.



Hear from leading executive coaches and management consultants, entrepreneurs, and transformative business advisors.



Connect with angel and startup investors. Whether you are seeking funding or just want to learn more about the process.

Become a Sponsor

$ 350 / single event

$ 1000 / four events

Including Co-Marketing with each event

Are you looking for a conducive environment to grow your company?

Events Calendar

Here are the events at OPO Startups. Events and Workshops are one of the benefits of OPO Startups Membership. Many of the evening events are open to the public.

There are no scheduled events at this time.
Would you like a mentor to coach and encourage you through the challenges of a startup?


Partnership and Sponsorship Opportunities

OPO Startups is always looking to partner with area businesses and organizations. Contact Us to talk about our partnership/sponsorship opportunities and to see if we’re a good fit for each other.

Sponsorship Levels

  • Founding Partners: $10,000+
  • Postmaster General: $5,000-$10,000
  • Postal Carrier: $1,000 - $5,000

Our Partners

google for entrepreneurs
microsoft bizspark
missouri technology corp.
Do you desire to collaborate, share leads and network with other digital businesses?


Come join us! We are accepting applications.

Letter Carrier

$ 75 / month

  • 1 Membership
  • Shared Community Room
  • 8 AM - 6 PM / Weekday Access

Postal Sorter

$ 150 / month

  • 1 Membership
  • 1 Dedicated Workstation
  • 24/7 Access


$ 500 / month

  • 3 Memberships
  • 1 Dedicated Office
  • 24/7 Access

Included Services with all membership levels

  • Fiber Internet with Wi-Fi
  • Coffee and Snacks
  • Shared Conference Rooms
  • OPO Workshops & Programming
  • Wellness Center

Additional Services (as available)

  • Lockers $25/month
  • Reserved Parking $75/month
Would you like to use your limited resources on growing your business?

Contact Us

If you have a question or would like more information, complete the form below.

Want to ask something?

Our information

119 South Main Street
Saint Charles, Missouri. United States,

(314) 328-4656

Schedule a Tour Today!

Schedule a Tour

To schedule a tour, fill out the form below, and we will contact you to confirm your tour date. Or email us at info@opostartups.com and we’ll schedule your tour by email. Tours usually take an hour.

Schedule by Form