Find out if you were overcharged.
Forward one invoice and the contract behind it. Kynthar checks the pair and shows its work.
NewCheck a customs entry for overpaid duties (free)$12,852.00
Overcharge in the sample pair below: 8,400 units, one line item.
$1.53 / EA
Billed above the contracted ceiling: $14.32 against §4.2’s $12.79.
6 checks
Run on every pair. This one: 1 fail, 5 pass, each with its source line.
The checks
Six checks on every pair.
Each invoice is read against the contract and PO behind it. Here are all six on the sample pair: one fail, five passes, each with its source line.
Price vs. contract
Every billed unit price against the negotiated price or ceiling in the agreement.
Duplicate window
The same invoice, billed twice. Caught before it pays out twice.
Unit-of-measure
Eaches billed as eaches, not cases, not pounds.
Freight terms
Freight charged only the way the agreement allows.
Tax
No tax billed where an exemption is on file.
Early-pay discount
Discounts you’re owed on terms, actually taken.
All six run on every pair you send. The fragments above are from the synthetic sample, walkable below. And the pair is the front door: across your full history, the platform watches 90+ more signals (delivery, pricing drift, vendor risk), each with the same receipt.
The receipt
Every finding shows its work.
This one is synthetic, built so you can inspect everything before sharing anything. Click through it.
Every real finding ships in exactly this format. If we can’t show the receipt, we don’t make the claim.
Beyond the pair check
Track everything. Miss nothing.
The pair check is one read. Kynthar keeps that read running across everything that flows through your procurement inbox — and tells you what to act on before money moves.
Every purchase order
Acks, change orders, and receipts land on the PO's timeline as they arrive. Status without chasing anyone.
Every promise date
A vendor's acknowledgment revises the ship date? Tracked as a delta, with the email that moved it as the source.
Every price
Per item, per vendor, over time. A price-increase email is flagged against your open orders the day it lands — and checked against the next invoice that cites it.
Every contract term
Invoices are checked against the clause that governs them: ceilings, payment terms, escalators.
Every vendor identity
A banking-change email gets flagged before money moves. The classic wire-fraud setup, caught on arrival.
Every shipment
ASN to bill of lading to proof of delivery, quantities reconciled across the chain.
One mechanic underneath: forward the email, and the story updates itself. 100+checks run continuously as documents arrive — start with one pair.
The check
Try it on one pair.
Forward one invoice and the contract (or PO) behind it to procurement@kynthar.com, or drop the two files below. You’ll get a verdict right here. Most pairs resolve in about a minute: matched, or mismatched with the exact line, the billed vs. contracted price, and the clause. One email. No account. No sales call.
Redacted copies are fine. Use exports you generate yourself.
Security
Built for a team that answers to legal and finance.
- You choose what to send. One pair is enough to start. Redacted copies work.
- Your documents are used to produce your receipt and nothing else.
- We never contact your vendors.
- No ERP connection, no IT ticket, no integration: a pair check is one email.
Your data, your tenant
Row-level security on every query; isolation enforced at the database layer, server-side.
Encrypted in flight and at rest
TLS 1.2+ on every connection; AES-256 at rest.
Hashed, scoped API credentials
SHA-256 hashed at rest, scoped to one company, rotatable without downtime.
Never used to train AI models
Kynthar never trains models on your data. Our LLM providers process it only to serve our requests, under enterprise API terms that prohibit training on customer data.
Delete everything on request
Documents, extractions, and audit trail permanently deleted within 30 days of request.
Every access logged
Auth events, API calls, and data access logged with 365-day retention.
Security questionnaire: security@kynthar.com. Full practices: kynthar.com/security.
The path
Where this goes.
- 01One pairA verdict with a receipt.
- 02One vendor, one quarterA mini-audit with a dollar total.
- 03Twelve monthsThe full retrospective audit.
- 04ContinuousEvery invoice checked before it's paid. Implementation = forward an email.
Each step is earned by the one before it. You never share more than the last result justified. When you’re ready for more: self-serve Team is $1,250/month and annual Platform contracts are sized to your volume. Details on the pricing page.
FAQ
Five questions, honest answers.
What happens to my data?
Your documents are used to produce your receipt and nothing else. They live in your own isolated tenant, are never used to train models, and are deleted on request.
How fast does it work?
The system resolves most pairs in minutes. The promise we print is the one we can always keep on the worst realistic input: your verdict lands within one business day.
Can we cancel anytime?
Yes. At the pair-check stage there is nothing to cancel. You sent one email. Team is $1,250/month, self-serve, cancel anytime; Platform is an annual contract. Terms are on the pricing page.
What if it gets something wrong?
Every finding carries its receipt (the source line, the clause, and the math), so a wrong finding is checkable, not arguable. Withdrawn findings are tracked, and you never act on a number you can't trace to its source line. We'd rather print no withdrawal rate than one too thin to trust.
Do we need IT involved to start?
No. A pair check is one forwarded email. IT enters only if and when you connect systems at later rungs.
Forward one invoice and its contract.
Find out if you were overcharged.
From the founder
Kynthar is built and run by Josh Spadaro, built after watching procurement teams at multiple manufacturers drown in volume. If you’d rather talk to a person before forwarding anything: jspadaro@kynthar.com, or grab time directly for a guided demo.
Josh SpadaroFounder, Kynthar