Morning inventory diff between your 3PL and your Shopify store

The buildable idea

Daily reconciliation service with a human-readable diff and auto-correction

Core value: Every morning at 6am the brand gets a plain-English diff: these 11 SKUs disagree, here is the likely cause, and here is the one-click correction to push

Who has this pain

Shopify brands doing 100-5,000 orders/day through a third-party 3PL

• —Storefront stock diverges from physical stock
• —oversells and refunds damage trust
• —nobody notices until a customer complains
• —nightly CSV reconciliation eats a weekend
• —SKU format and unit-of-measure mismatches break naive syncs

What they do today: Saturday CSV exports, VLOOKUP in a spreadsheet, and manual SKU corrections when someone happens to spot the problem

Competitor gap

Existing inventory sync apps assume clean single-warehouse data and silently overwrite; they do not explain drift or handle case packs, leading zeros, or multi-location 3PLs

Monetization angle

Per-location SaaS pricing: $79–$299/mo per location. Land the one operator who feels the pain daily, prove the recovered dollars in month one, then expand to seats and locations.

How to validate in a week

1. 01Day 1 — Find 25 targets: Shopify brands shipping 100-5,000 orders/day through a 3PL. Pull them from public directories, review sites and the original subreddit. Do not filter yet.
2. 02Day 2 — Cold outreach with the pain, not the product. Open with "Storefront stock diverges from physical stock" and ask how they handle it today. Reply rate target: 8%.
3. 03Day 3 — Run 8 calls. Ask what they currently pay to solve this, what they tried, and what would make them switch mid-contract.
4. 04Day 4 — Deliver Every morning at 6am the brand gets a plain-English diff: these 11 SKUs disagree, here is the likely cause, and here is the one-click correction to push manually for 2 of them. A spreadsheet and your own hands are fine. This is the concierge test.
5. 05Day 5 — Price it. Quote $79–$299/mo per location and ask for a card. A verbal yes is worth nothing; a deposit is worth everything.
6. 06Day 6–7 — Decide. 3+ paid deposits in Ecommerce operations means build. Under 3 means the pain is real but the buyer is wrong — go back to Day 1.

Not moving forward? The scoring rubric explains why this idea scored where it did.