Open iBox BT LE lockboxes with your smartphone via Bluetooth -- no physical key fobs required.
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Supra eKEY
suprasystems.comSupra eKEY is the most widely deployed electronic lockbox system in real estate, now owned by Honeywell, providing secure property access with comprehensive showing activity tracking.
The verdict
Supra eKEY offers eKEY Basic for keybox and showing activity tools and eKEY Professional for MLS search, maps, and buyer-tour features. Supra publishes no national list price, so agents must confirm service and lockbox costs with their association or MLS.
01 — Overview
What Supra eKEY is, and isn't.
Supra eKEY is an electronic lockbox system now owned by Honeywell. Agents use the eKEY mobile app to open supported lockboxes, track access activity, manage keybox settings, and receive showing notifications.
Supra publishes two current app levels: eKEY Basic and eKEY Professional. Professional adds MLS search, agent rosters, Hotsheets, maps, directions, buyer profiles, and Supra Home Tour tools.
Supra does not publish a national list price for eKEY service or lockboxes. It directs agents to their local real estate association or MLS, and its self-signup material says product options and billing frequency vary by association.
02 — Features ◆ standout
10 features, scored.
The 5 marked ◆ are why we rate Supra eKEY a 4.3 overall.
Every lockbox opening is logged with agent identity, date, time, and duration for full accountability.
Listing agents receive instant alerts when their lockboxes are accessed, with full agent details.
Set showing windows and restrict access to specific hours or date ranges for seller convenience.
Works with ShowingTime to grant lockbox access only during confirmed showing appointments.
If an agent's device is lost or compromised, access can be remotely revoked immediately.
Secure shackle mechanism that releases only with authorized access credentials.
App shows lockbox battery levels; long-life batteries last months between changes.
Web-based portal for managing lockbox inventory, access reports, and account settings.
Agent credentials verified through MLS membership status before granting lockbox access.
03 — Verdict at a glance
What we like — and where it falls short.
Pros
- +Largest market share of any lockbox system -- most agents already have eKEY access
- +Comprehensive access tracking provides security and showing verification for sellers
- +Bluetooth smartphone access eliminates the need for separate physical key fobs
- +Tight ShowingTime integration for appointment-synced access control
- +Honeywell acquisition (June 2024) brings enterprise resources for future development
Cons
- −Supra does not publish national eKEY or lockbox prices
- −Products, billing frequency, and availability vary by association or MLS
- −Showing management is a separate Supra product rather than an included eKEY Basic feature
04 — Pricing
2 tiers. Pick the plan that matches your volume.
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.
eKEY Basic Most pick this
Custom
- Open lockboxes, release shackles, and read keyboxes
- Use phone biometrics or Apple Watch to open lockboxes
- Track lockbox inventory and manage access hours
- View showing activity and send notifications
- View real-time property notes
eKEY Professional
Custom
- All eKEY Basic keybox and showing features
- Search and view MLS listings offline
- View agent rosters and MLS Hotsheets
- Maps and turn-by-turn directions
- Buyer profiles and Supra Home Tour recommendations and feedback
05 — Integrations
What it talks to, out of the box.
Direct integrations marked first; Zapier and Make cover the long tail.
ShowingTime
Most major MLSs
Supra SupraWEB
Public API: yes
06 — Top alternative
If Supra eKEY isn't the right shape.
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SentriLock
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.
07 — Frequently asked
Questions every Supra eKEY shopper asks.
How much does Supra eKEY cost per month?
Supra does not publish a national monthly price. Its official materials say eKEY pricing can differ by organization and direct agents to their local real estate association or MLS. Billing-frequency options also vary by association.
Who owns Supra eKEY now?
Honeywell International acquired Supra from Carrier Global in June 2024 as part of a $4.95 billion deal for Carrier's Global Access Solutions business. Supra is now part of Honeywell's Building Automation division alongside LenelS2 and Onity.
How much do Supra lockboxes cost?
Supra does not publish a national sale, rental, or lease price for iBox BT LE or Invoy lockboxes. Contact your local association or MLS for current options and fees.
Does Supra work with ShowingTime?
Yes. Supra integrates tightly with ShowingTime so lockbox access can be granted only during confirmed showing appointments. This adds security by ensuring agents can only access properties during their scheduled showing windows.
What is the difference between Supra and SentriLock?
Both are electronic lockbox systems, and availability is usually determined by the local association or MLS. Supra offers eKEY Basic for keybox access and showing activity, plus eKEY Professional with MLS search, maps, agent rosters, and Supra Home Tour.
What if my phone dies during a showing?
You need a working smartphone to open the lockbox. The eKEY app works offline after initial authorization, but you still need phone power. Many agents carry portable battery packs as backup. If your device is lost, access can be remotely revoked.