ShrinkSignal

Idea

ShrinkSignal catches cashier-driven register theft at small independent retailers and restaurants, without a single camera. It connects to a store's existing Square account, builds a statistical baseline of each employee's void, discount, comp, and no-sale rate, and flags anyone drifting far enough from their location's normal pattern to be worth a look. Owners get a plain-English weekly digest and a real-time alert for the worst cases, at a fraction of what camera-based loss prevention tools cost.

Market gap

"Sweethearting," an employee quietly comping, discounting, or voiding items for friends and family, is the most common form of retail theft and the hardest to see because the transaction looks partly legitimate in the POS log. Every serious tool built to catch it (Agilence, Solink, DohShield) assumes a multi-location chain with security cameras and a budget for enterprise or franchise-scale software. A single-location coffee shop, boutique, or 3-unit taco chain running Square has raw void and discount reports sitting in its dashboard right now, but no one has time to eyeball them daily for statistical outliers, and no self-serve product does that math for them. The gap is not awareness of the problem, small operators already ask their POS vendor for better reporting, it is the absence of an affordable, camera-free, plug-in analytics layer sized for a single store.

Total Addressable Market (TAM)

Bottom-up, built from named POS vendors' own reported footprint:

• Toast: 155,000 live restaurant locations (Restaurant Velocity / 6sense POS market data, 2025).
• Clover: 175,000 restaurant locations reported by the same source (this excludes Clover's separate non-restaurant retail merchant base, so the figure below is conservative).
• SAM (serviceable, Toast + Clover restaurant locations only, MVP targets Square first but the addressable base for a Square-plus-Clover-plus-Toast product is this combined set): 330,000 locations.
• ACV assumption: blended average of $600/year across the Starter ($49/mo, 1-2 locations) and Growth ($39/mo/location, 3-10 locations) tiers, both far under Solink's $175-299+/month-per-location and DohShield's $299/month-per-store camera-based pricing.
• SAM revenue potential: 330,000 x $600 = ~$198M/year.
• SOM: a 1.5% penetration target over 3 years, in line with early-stage vertical SaaS penetration into a fragmented small-business market, is 4,950 locations x $600 = ~$2.97M ARR.

Square itself reports 3M+ active venues, but that base is dominated by very small or single-employee sellers with limited theft exposure, so it is excluded from the SAM math above and treated as upside, not counted.

Monetization strategy

Flat-fee monthly SaaS subscription per connected location, billed through Stripe. No revenue share, no per-camera or per-seat fee. Customers keep paying because the risk leaderboard and weekly digest become a standing Monday-morning habit for the owner, the same way a P&L report is, and because canceling means going back to manually scanning raw void reports with no baseline to compare against.

Pricing strategy

• Starter (entry point): $49/month for 1-2 locations. Weekly plain-English digest, real-time critical alerts, 12-month transaction history.
• Growth (anchor): $39/month per location for 3-10 locations. Adds cross-location employee risk ranking, manager-level alert routing, 24-month history.
• Multi-Unit: custom pricing for 11+ locations, still priced well under Agilence and Solink's enterprise quotes, adds CSV/API export and SSO.

The anchor is Growth because most target customers (small chains of 2-10 units) land there, and per-location pricing scales naturally as a customer adds stores rather than requiring a plan change.

Lead magnet

A free, no-signup Sweethearting Cost Calculator: the owner enters employee count, average ticket size, and shift hours, and gets an estimated annual dollar loss from unchecked void, discount, and comp abuse, benchmarked against the NRF/Appriss industry loss rate. It ends with "connect your Square account to see your actual number," pulling the visitor straight into product signup.

Social proof that the problem exists

• NRF and Appriss Retail's 2026 Total Retail Loss Benchmark Report puts employee theft at roughly $26 billion a year industry-wide, with 57.6% of small businesses reporting internal or employee theft. https://getsafeandsound.com/blog/retail-theft-statistics/
• A cited academic study on "sweethearting" found 67% of surveyed cashiers admitted giving an unauthorized sweetheart deal in just the previous two months, and notes the behavior is likely underreported even in anonymous surveys because employees don't perceive it as real theft. https://www.dohassist.com/resources-glossary-sweethearting
• Square's own merchant community has an active thread of retailers explicitly asking for better integrated void, discount, and comp reporting because the native reports are disconnected and hard to act on. https://community.squareup.com/t5/Questions-How-To/Inventory-voids-discounts-and-comps-reports/m-p/628915
• A 2026 analysis of 11,389 Capterra reviews across restaurant POS platforms (Toast, Clover, SpotOn, TouchBistro, CAKE, Epos Now, Lavu) found that the single most-cited operator complaint was the inability to reconcile what the POS reports against what actually happened at the register, the exact gap ShrinkSignal's anomaly layer closes. https://www.deliverguard.io/research/restaurant-software-pain-points-2026

Competitors

• Agilence: enterprise loss-prevention analytics platform combining POS, video, and case management data; custom quotes, built for "hundreds of the world's leading retailers, grocers, and restaurant operators," i.e. large chains, not single-location independents. https://www.agilenceinc.com/solutions/loss-prevention
• Solink: cloud video security paired with POS transaction correlation; pricing starts around $175/month per location and scales with camera count and video retention, requires existing security camera infrastructure. https://solink.com/pricing/
• DohAssist (DohShield): sweethearting detection product built explicitly "for Franchise Operators," correlates POS data with synchronized video reviewed by trained human analysts, starts at $299/month per store, requires cameras. https://www.dohassist.com/about
• Native POS reporting (Square, Clover, Lightspeed, Toast): all four ship raw void, discount, comp, and no-sale reports, but none compute a per-employee statistical baseline, flag outliers automatically, or send a proactive alert. The owner has to know to look and know what "normal" is.

What competitors offer now

Agilence and Solink both assume the buyer has (or will install) a camera network and a loss-prevention budget line, and both sell through a quote-based enterprise motion with onboarding calls. DohShield is explicitly multi-unit-franchise positioned and also camera-dependent. Native POS reports give raw exportable lists, dated and itemized by employee, but require the owner to manually sort, compare, and remember what a "normal" void rate looks like for that specific shop, an audit task most single-location owners simply never get to.

What can be done differently to attract customers

Skip cameras entirely. ShrinkSignal reads only the transaction data every Square merchant already has, so there is no hardware, no installer, no enterprise sales call, and a live dashboard within minutes of an OAuth connect. Price per location flat, self-serve, credit card at signup, no quote required, at roughly a fifth to a third of what the camera-based competitors charge. Enter through the free Sweethearting Cost Calculator so an owner sees a specific dollar estimate for their own shop before ever talking to anyone, then convert that number into a Square connection.