Sovereign Shelf
Own Your Shelf.
Own Your Data.
Under $10 a tag in bulk.
Electronic shelf tags that pay for themselves — and update in moments, straight from your POS.
Our Hardware
Purpose-built for shelf-edge intelligence
Local-First Architecture
Every store gets a Sovereign Shelf Commander that runs the full pipeline on-premises — designer, rendering, POS integration, binding. Internet outages don't stop your store.
Air-gapped on request
For environments that cannot accept any internet connectivity, Sovereign Shelf offers air-gapped configurations as a special-order engagement. Contact us.
One-Click Price Sync
Push live pricing from your business system to every shelf label in moments. No CSV exports, no manual entry. Direct purchase order and pricing field mapping.
Three product lines. One platform.
Sentinel runs in the cloud for simple deployments. Guardian runs on-premise with POS integration and offline resilience. Vault is fully air-gapped for the strictest privacy and compliance environments.
SENTINEL
Monthly
- Deployment Cloud-managed via web portal
- POS integration No
- Includes Tag operations, template library, fleet, simple reporting
- Starter pack $749.99 (1 beacon, 1 scanner, 50 mounts)
- Service fee $99.99/mo
GUARDIAN
Monthly
- Deployment On-prem Commander, internet-tolerant
- POS integration Yes (live SKU sync)
- Includes Everything in Sentinel + POS, pick-by-light, will-call, advanced reporting
- Starter pack $2,399.99 (1 commander, 1 beacon, 1 scanner, 200 mounts)
- Service fee $149.99/mo
VAULT
Special Order
- Deployment Fully air-gapped Commander
- Internet Never required
- Updates Signed USB manifests (Ed25519)
- Best for Defence, regulated medical, high-privacy retail
- Pricing Quoted per engagement
System Integration
One-Click Price Sync
Push live pricing from your business system to every shelf label in moments. No CSV exports. No manual re-entry. No overnight batch jobs.
- Direct field mapping: price levels to ESL display
- Purchase order sync propagates to shelf automatically
- Multi-store support — isolate by store or broadcast fleet-wide
- Full audit trail: every price change logged with purchase order reference
- Runs on the on-prem Commander — works during internet outages
Now integrated with Spire Systems
Automatic price sync, pick-by-light, and will-call staging — all from your Spire POS.
→
$ price-sync --store=downtown --trigger=po-update
# Connecting to inventory system...
[OK] Session established — user: sync_agent
# Fetching PO #INV-2026-0041 delta...
ITEMS_CHANGED: 847
PRICE_UPDATES: 312
NEW_LISTINGS: 23
# Queuing BLE push to 312 tags...
[OK] Push complete — 312/312 confirmed
ELAPSED: 18.4s
—
[OK] Audit log written to /log/sync-2026-0222.jsonl
Vault — when nothing leaves the building
For defence, regulated medical, government, and the most privacy-sensitive retail environments. Vault is a special-order deployment, quoted per engagement.
Air-Gapped
Zero internet connectivity, by design.
The Vault Commander runs the full Sovereign Shelf pipeline locally with no path to any vendor cloud. Pricing updates and template changes move through signed USB manifests with Ed25519 verification — auditable, reversible, offline-only.
- Commander runs on-premises with no WAN egress at all
- Pricing & template updates via signed USB manifest (Ed25519)
- Tag pushes happen entirely on the customer's LAN
- Audit-trail-friendly: every change is signed, timestamped, traceable
- Compatible with the same TAG21 / TAG35 / TAG58 hardware as Sentinel and Guardian
Vault is not on the standard line card. We build each Vault deployment to the customer's compliance scope. Tell us what you need.
Tier comparison
| Capability | Sentinel | Guardian | Vault |
|---|---|---|---|
| Internet connection | Required | Optional | Never |
| On-prem Commander | — | ✓ | ✓ |
| POS integration | — | ✓ | ✓ (offline) |
| Update path | Cloud push | Local + cloud | Signed USB |
| Pricing model | $99.99/mo | $149.99/mo | Quoted |
Envoy Program
Turn Existing Android
Devices Into Smart Kiosks
The Envoy program repurposes Android phones and tablets already in your facility as professional shelf-edge display kiosks. No new hardware required. Zero procurement lead time.
Android 6.0+
Minimum requirement
Device Owner
Kiosk lockdown mode
Offline Cache
Local SQLite fallback
LAN-connected
Talks to your on-prem Commander
01
Enroll device via admin portal — hardware ID auto-registered
→
02
Install Envoy APK — Device Owner mode, full kiosk lockdown
→
03
Assign content and products — displays update with every Live sync