Zelstrom delivers financial-grade media auditing to uncover recoverable value, invoice leakage, and contractual deviations before they reach your P&L.
Estimate verified-recoverable value and leakage before you request an audit.
Model verified-recoverable exposure from booking compliance, invoice validation, and contract adherence. Designed for finance-led audit scopes, not performance optimization.
Based on contract adherence, invoice validation, and delivery verification. Typical booking compliance audits identify 2-5% exposure of audited spend in enterprise portfolios.
We will carry this estimate into your request, confirm scope, and respond within 24-48 hours.
Share your scope and we will respond within 24-48 hours.
Zelstrom delivers a financial-grade audit of paid media spend. Provide a brief scope and we will confirm data access, timing, and next steps for recovery support.
A financial audit of media spend, built for CFO-level accountability.
Match booked media, platform delivery logs, and invoices to verify what was paid and what was delivered.
Validate platform data at the source to confirm delivery, rate integrity, and documented make-goods.
Review billing structures, commissions, and pass-through costs against contract terms and approvals.
Identify variance from market benchmarks and contracted rate cards to surface cost anomalies.
Quantify the delta between paid, booked, and delivered inventory with a documented trail.
Paid media is one of the largest budget lines, yet it lacks the controls finance expects for any material expense.
Spend flows through platforms, agencies, and intermediaries with limited reconciliation. Without an independent audit, finance teams cannot verify what was paid, what was delivered, and what value is recoverable.
A closed-loop audit that starts with data access and ends with recoveries and a finance-grade report.
Secure access to contracts, platform data, and billing files.
Match bookings to delivery logs and invoices.
Compare rates, fees, and terms to agreed benchmarks.
Quantify recoverable value with a documented trail.
Support credits, make-goods, and disputes with evidence.
Finance-ready report with outcomes and controls.
A calm, methodical process that treats media spend like any other material expense.
Collect platform data, contracts, insertion orders, invoices, and agency billing schedules.
Match bookings to delivery logs and invoices to validate paid versus delivered media.
Compare rates, fees, and performance benchmarks to identify deviations from agreed terms.
Quantify under-delivery, missing credits, or unauthorized charges with evidence.
Provide a finance-grade report detailing recoverable value and documentation for resolution.
Aligned incentives. Zero upside unless we find money.
Covers secure data access, reconciliation setup, and the initial audit scope. This fee ensures the audit is independent and fully documented.
We only participate in upside once value is recovered or verified as recoverable. If no money is found, there is no success fee.
Upfront fee is separate and covers audit setup and delivery.
No testimonials, no hype. Just disciplined audit methods and documented outcomes.
Every finding is reconciled to contracts, invoices, and platform delivery logs with an evidence trail.
We do not buy media, optimize ads, or resell data. Our only job is to audit spend.
Reports are structured for finance teams, with clear variance drivers and recoverable value.