Every finding shows the contract clause, the invoice line, and the math. Nothing is “flagged” without proof.
Is your 3PL invoice correct?
SlashWith audits every 3PL invoice against your contract and your Shopify orders — automatically. Billing errors, missed credits, and rate drift, caught before you pay, with exact evidence for every dollar.
Every fulfillment charge, proven.
Read-only access · No sales call · If we find nothing, you pay nothing
Evidence, not estimates
The audit runs both ways
We report variances in your 3PL's favor too. Honest numbers are the whole point.
Nothing found, nothing owed
Your first historical audit is free. A verified clean bill is a real result — and you keep the report.
How it works
Set it up once. Every invoice after that audits itself.
1
Connect Shopify
Read-only OAuth. We sync orders, fulfillments, and returns automatically — no customer names or addresses needed.
2
Forward your invoices
One auto-forward rule sends your 3PL invoices to your dedicated SlashWith inbox. Direct 3PL portal connectors (ShipBob first) are rolling out.
3
Upload your rate card — once
We compile your contract into precise audit rules and confirm anything ambiguous by a one-line email reply. Amendments? Just forward them.
Then it's completely hands-off.
Every new invoice is parsed, checked line-by-line against your rates and your Shopify activity, and lands in your inbox with a status — Clean, Review, or Hold.
Approve invoices in one click, from email. Disputes are drafted for your approval, follow-ups are prepared for you, and credits are watched until they actually land. The running tally always shows what the audit has saved you versus what it costs — including the share of spend we can audit, stated honestly.
SlashWith — your monthly digest
CleanInvoice #20443,102 lines checked · 62% of spend covered
HoldInvoice #2041$1,240 verified errors · due in 6 days
Credit$612 landedfrom dispute #3 · invoice line 218
Value delivered $4,214 · Fees paid $598Net +$3,616
Approve invoice #2044 — one click, from email ▸
Illustrative example with sample data.
What a finding looks like
Proof you can forward — to your CFO or your 3PL.
Every discrepancy is a self-contained evidence card: the clause you agreed to, the line you were billed, and the arithmetic between them. It's the same document you attach to the dispute — which is why disputes get resolved.
Verified findingInvoice #2041 · line 118
Rate Card §4.2 — “Additional item pick: $0.62 per unit after the first unit per shipment.”
PICK-ADD · Additional pick fee · 1,743 units × $0.85 = $1,481.55
| Billed | 1,743 × $0.85 = $1,481.55 |
| Contracted | 1,743 × $0.62 = $1,080.66 |
| Variance | $400.89 |
Dispute window: 41 days remainingPeriod: Jul 1–31
Illustrative example with sample data.
What we check
Every line, against your contract and your store.
Contracted ratesPick, pack, storage, receiving — billed rate vs. the rate you signed.
Rate driftPrices that quietly rose with no amendment on file.
Volume tiersDiscounts you earned but never received.
Canceled orders billedFulfillment charges on orders Shopify shows were canceled.
Order & unit countsBilled picks reconciled against actual fulfillments.
DuplicatesDouble-billed lines and repeated invoices.
Missing creditsCredits your 3PL promised that never appeared. We watch until they land.
Minimums & feesAccount fees and monthly minimums applied correctly.
Storage continuityStorage rate drift and unexplained quantity jumps, month over month.
Built to be believed.
Audit tools that inflate their numbers don't survive contact with a real account manager. SlashWith is built the opposite way — conservative by design, so that when it says “verified,” your 3PL's billing team can check the math and agree.
- Five-way classification. Verified · needs verification · optimization · in-your-3PL's-favor · data-quality. Never one inflated number.
- Deterministic math. AI reads documents; it never invents a dollar figure. Every calculation is exact, repeatable arithmetic.
- Adversarial double-check. Before a finding is published, a second automated pass tries to refute it. If it can't be defended, it isn't “verified.”
- An honest ROI meter. Your digest shows value delivered vs. fees paid. If you're not ahead, we'll tell you — and suggest you pay us less.
Security & privacy
Your contract is sensitive. We treat it that way.
Encrypted in transit and at rest; documents are hashed and versioned, never silently altered.
Standing confidentiality & data-processing agreement covers every upload — not an optional extra.
Read-only, minimal scopes. No customer names, emails, or addresses — order IDs, SKUs, and quantities are enough.
No AI training on your data, deletion on request, and one-click export of everything, any time.
Pricing
Transparent, and aligned with your outcome.
Monitor
$249 /month
+ 10% of credits that land
- One store, one 3PL, monthly invoices
- Every invoice audited automatically
- Email digest with one-click approval
- Disputes drafted for your approval
- Credit watch until the money lands
Growth
$599 /month
+ 7% of credits that land
- Everything in Monitor
- Two 3PLs or locations, weekly invoices
- Higher audited-spend capacity
- Coming to Growth: cost-per-order analytics, month-end close packet, QuickBooks/Xero sync, renewal negotiation pack
Scale
$1,299 /month
+ 5% of credits that land
- Everything in Growth
- Multiple stores and 3PLs
- Highest audited-spend capacity
- Priority support
- Coming to Scale: carrier & claims modules, team roles
Where we are today: SlashWith is in its founding program. Your free historical audit is delivered first; monitoring plans activate as onboarding opens, and reserving now locks the base subscription price above for life — first 25 merchants. One-time historical recovery without a plan: 20% of credits that land, under a signed agreement. Annual plans get two months free. Every plan carries the 90-day guarantee: if the audit hasn't delivered more documented value than it cost (measured on landed credits and pre-payment corrections), the difference is credited back. Success fees apply only to credits verified as landed on your invoices, never to estimates — and never to acknowledgements that haven't landed yet.
FAQ
Questions merchants ask.
How do I audit a 3PL invoice?
A proper audit compares three sources: your contract or rate card (what you agreed to pay), the invoice (what you were billed), and your order data (what actually happened). SlashWith automates all three — it compiles your rate card into precise rules, normalizes every invoice line, cross-checks against Shopify orders, fulfillments, and returns, and flags variances with the exact clause, line, and arithmetic.
What data do you need from me?
Three things, each set up once: a read-only Shopify connection, your 3PL invoices (auto-forwarded from your inbox or pulled from a supported portal), and your rate card, uploaded once. After that, every new invoice is audited automatically.
Is my contract kept confidential?
Yes — encrypted in transit and at rest, covered by a standing confidentiality and data-processing agreement, never used to train AI models, deletable on request. You can also start without it: operational checks (canceled orders billed, count mismatches, duplicates) need only your invoice and Shopify data.
What does it cost?
The audit and full report are free. If you want the money recovered: 20% of credits that land (one-time, under a signed agreement), or included with a plan — Monitor $249/mo + 10%, Growth $599/mo + 7%, Scale $1,299/mo + 5%, fees only on credits that verifiably land on your invoices. The first 25 founding merchants lock their base price for life, and the 90-day guarantee means the product must out-earn its cost or the difference comes back.
What if you find nothing wrong?
Then the audit is free and you owe nothing — and you get a line-by-line reconciliation statement showing exactly what was checked. A verified clean bill is worth having: your finance team can file it with the payment approval.
How do I actually get the money back?
Almost always as a credit memo on a future invoice. You approve a dispute package — evidence table plus a professionally worded email — and send it to your account manager. SlashWith tracks the response, drafts follow-ups for stalled disputes (you approve before anything is sent), and watches your next invoices to confirm the credit actually lands. Contracts usually limit how long you have to dispute, so findings are surfaced while they're still disputable.
Common 3PL billing errors — what should I look for?
Billed rates that don't match the contract, rate increases with no amendment, volume discounts never applied, charges on canceled orders, duplicate lines, incorrect minimums, promised credits that never appear, and storage rate or quantity jumps with no explanation. These are the checks SlashWith runs on every invoice — and coverage grows module by module, with the audited share of your spend always stated on the report.
Will this hurt my relationship with my 3PL?
It's designed not to. Findings are conservative and factual — clause, line, math — which keeps disputes professional. We also report variances in your 3PL's favor and issue clean statements when billing is correct. Careful reconciliation tends to earn respect, not resentment.
Find out what your 3PL invoices have been hiding.
Three months of invoices, one rate card, and a read-only Shopify connection. If we find nothing, you pay nothing — and either way, you'll know.