Full showing management platform included free for all lockbox customers, competing directly with ShowingTime.
S
SentriLock
sentrilock.com Free tierSentriLock is the NAR-owned electronic lockbox and showing management platform with free SentriKey Showing Service for all lockbox customers.
The verdict
SentriLock has transformed from a lockbox-only system into a genuine ShowingTime competitor by offering free showing management to all lockbox customers. In markets where SentriLock is the standard, agents now get lockbox access plus showing scheduling at no extra cost -- a compelling value proposition that Supra does not match.
01 — Overview
What SentriLock is, and isn't.
SentriLock, a 100% owned subsidiary of the National Association of REALTORS (NAR), has evolved from a lockbox-only system into a full showing management platform. The SentriKey Showing Service, launched in 2021 to compete with ShowingTime after Zillow's acquisition, is now included free for all lockbox customers at the Basic tier -- making SentriLock a genuine ShowingTime alternative in markets where it has lockbox presence.
The platform serves approximately 500,000 agents through REALTOR Association partnerships. The SentriKey Real Estate app provides Bluetooth lockbox access, comprehensive access logging, and now integrates RPR (Realtors Property Resource) market data directly in the mobile interface -- the first platform to offer instant RPR access on mobile. In November 2024, SentriLock partnered with Local Logic for hyperlocal marketing content within the app.
SentriLock's Pro tier (~$22/month, varying by association) adds a concierge call center, SAM AI virtual assistant for automated showing coordination, and Client Connect for buyer-facing tour sharing. Lockbox pricing is set by individual associations, typically $128-145 for purchase. NAR ownership means REALTOR-focused governance and pricing input, which many agents view as a significant advantage over corporate-owned alternatives.
02 — Features ◆ standout
10 features, scored.
The 4 marked ◆ are why we rate SentriLock a 4.4 overall.
AI-powered showing coordination assistant that automates scheduling tasks (Pro tier).
First mobile platform with instant RPR (Realtors Property Resource) access for on-the-go market insights.
Open lockboxes using the SentriKey app on your phone via Bluetooth with comprehensive access logging.
Integrated hyperlocal marketing content including neighborhood insights and walkability data.
Complete logs of who accessed each lockbox with timestamps and listing agent notifications.
Buyer-facing app for sharing tour itineraries and property information (Pro tier).
Control when agents can access your lockbox based on showing hours and date ranges.
Generate temporary codes for contractors, inspectors, or non-REALTOR access.
REALTOR-owned company with industry-aligned governance and pricing input.
03 — Verdict at a glance
What we like — and where it falls short.
Pros
- +SentriKey Showing Service Basic is free for all lockbox customers since November 2023
- +NAR ownership means REALTOR-focused governance and industry pricing input
- +RPR market data integration gives agents instant property insights on mobile
- +SAM AI assistant automates showing coordination tasks (Pro tier)
- +Often lower total cost than Supra when factoring in lockbox and showing management together
- +One-day codes useful for inspector and contractor access
Cons
- −Market availability determined by association contracts, not agent choice
- −Smaller overall market share than Supra in many regions
- −Pro tier pricing varies by association, making cost comparisons difficult
- −App performance can vary; some users report Bluetooth connectivity issues
04 — Pricing
3 tiers. Most teams land on the middle one.
Prices below are as listed publicly Feb 2026. Verify on the official pricing page before committing — vendor pages change more often than our quarterly re-checks.
SentriKey App + Showing Service Basic
Custom
- SentriKey Real Estate mobile app access
- Bluetooth lockbox access
- SentriKey Showing Service Basic (free since Nov 2023)
- Listing management and showing scheduling
- Showing feedback collection
- RPR market data integration
SentriKey Showing Service Pro Most pick this
$22 / mo
$0/mo billed annually
- Full office dashboard and advanced reporting
- Concierge call center for showing coordination
- SAM AI virtual assistant for automated scheduling
- Client Connect app for buyer-facing tour sharing
- Multi-channel notifications
- Pricing varies by association (~$22/mo Oklahoma City example)
Lockbox Purchase
Custom
- Purchase SentriLock lockboxes ($128-145 each)
- Price varies by association ($128 Denver, $140 OKC, $145 Chicago)
- Own outright with no rental fees
- Annual subscription around $130/year plus tax (varies by association)
- One-time activation fee ~$50 at some associations
05 — Integrations
What it talks to, out of the box.
Direct integrations marked first; Zapier and Make cover the long tail.
ShowingTime
RPR (Realtors Property Resource)
Local Logic
REALTOR Associations
Participating MLSs
Public API: yes
06 — Top alternative
If SentriLock isn't the right shape.
S
Supra eKEY
Supra eKEY remains the most widely deployed lockbox system, but agents in SentriLock markets now get a better overall deal: SentriLock includes free showing management while Supra charges $15-21/month for eKEY alone without any built-in showing scheduling. Supra is the default where it is the MLS standard, but it is no longer the best value.
07 — Frequently asked
Questions every SentriLock shopper asks.
Is SentriKey Showing Service really free?
Yes. Since November 2023, SentriKey Showing Service Basic is included at no additional cost for all SentriLock lockbox customers. It includes listing management, showing scheduling, and feedback collection. The Pro tier with call center, SAM AI assistant, and Client Connect costs approximately $22/month (varies by association).
What is the difference between SentriLock and Supra?
Both are electronic lockbox systems with similar core functionality. SentriLock is owned by NAR and now includes a free showing management platform. Supra (owned by Honeywell since June 2024) charges $15-21/month for eKEY access in many markets and does not offer built-in showing management. Your MLS/Association determines which system is available.
How much do SentriLock lockboxes cost?
Lockbox purchase prices range from $128 to $145 depending on your association ($128 in Denver, $140 in Oklahoma City, $145 in Chicago). The 2026 annual SentriLock subscription is around $130 plus tax, though it varies by association. Some associations charge a one-time $50 activation fee.
What is SAM AI assistant?
SAM is SentriLock's AI-powered virtual assistant available on the Pro tier. It automates showing coordination tasks like scheduling, confirmations, and follow-ups, reducing the manual workload of managing showing appointments.
Does SentriLock integrate with RPR?
Yes. SentriLock partnered with RPR (Realtors Property Resource) to provide instant market data access directly within the SentriKey app. This makes SentriKey the first mobile platform with integrated RPR data for on-the-go property research.
Why is SentriLock owned by NAR?
NAR acquired SentriLock to provide a REALTOR-owned lockbox and showing management option for the industry, especially important after Zillow acquired ShowingTime in 2021. NAR ownership gives associations input on product development, pricing, and data governance.