The most advanced real estate lockboxes

Secure and reliable

Our lockboxes undergo more extensive independent security testing than any other product on the market, as well as rigorous testing for operation in various outdoor weather conditions. Built with high grade user-replaceable batteries, you should be able to get 14+ years of usage from our lockboxes.

Strong but accessible

FlexCodes™ and our SentriConnect® mobile app are easy, secure ways to grant temporary secure access to a lockbox on a certain day, at a certain time, and for a certain duration to a specified non-SentriLock user.

Features you’ll APP-reciate

SentriLock’s accompanying mobile app puts you in total control and delivers convenient lockbox features such as property details, access notifications, showing instructions, and even an industry-best feature to help keep you safe.

... And the other thing I really love about SentriLock, is that I know that I’m taking really good care of my sellers when I have a lockbox on there that I know that no one’s going to be able to break into, and I know it’s going to be easy for REALTORS to access.

— Heather Zimmaro

Director of Education, Coldwell Banker Heritage

The convergence of lockbox access, showing management, and innovative assistive software on the same platform is now the future state of the technology – and we are proud to offer it.

— Scott Fisher

CEO and Founder of SentriLock


The SentriKey Showing Service® is a fully integrated selling solution

Do what you do best

SentriKey Showing Service® helps REALTORS® stay organized and spend more time doing what they do best – selling homes and delivering outstanding service to clients.


A complete showing solution

Find perfect properties, send them to clients, schedule showings, build a daily itinerary, plan your driving route, review the properties’ listing details, open lockboxes, view showing instructions, and more!


Meet SAM® – your new best friend

SAM® is the industry’s first AI-based virtual assistant – and she’s ready to make your life easier. SAM® can reschedule showings so you can skip the back-and-forth of unnecessary phone calls, and she lets you know when it’s time to leave based on drive time and traffic patterns.

Let your work shine!

Create amazing experiences for your clients. Got a client concerned about selling their home? Share buyer feedback and activity directly with them online. Got a hot listing you want a client to see? Send it to them through the app.

Rest easy

We’re backed by the National Association of REALTORS®, America’s largest trade association. We have a 20-year track record of success and support over 400,000 agents and brokers. You can rely on us for the long haul.