Maximize media ROI with audit clarity

We uncover inefficiencies in your media spend using benchmark-driven analysis and performance tracking.

Powered by our proprietary Netscore® platform, we compare your costs and results against market standards, ensuring full contract compliance and smarter investment decisions.

We audit all media. Full stop.
We lead the field in digital media auditing and deliver modern, curated, and insightful offline audits as well.
Our work is focused on delivering tangible value because that’s what a true audit must do. Reports are detailed, clear in their conclusions, and packed with actionable recommendations.
We don’t just review media - we drive performance.

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Online

We analyze whether your digital ads are truly seen, safe, and regularly optimized. Full audit of CPM, CTR, fraud rate and media delivery.

TV

We assess your TV campaigns in detail: cost per Target Rating Point and Gross Rating Point efficiency, spot placement, delivery accuracy, and weekly campaign strategy – benchmarked against market norms.

Radio

Radio buying is often overlooked – we verify spot volumes, timing (dayparts), and CPM.

Print

Do your print ads match what was promised? We verify placement, size, rate, and distribution, ensuring media compliance down to the detail.

OOH

Out-of-home campaigns are complex. We verify that all booked panels are displayed, rotated as agreed, and priced reasonably.

Performance Value Tracking

Get full visibility into your agency’s financial delivery. Track rebates, bonuses, and under-deliveries with precision — even a 1% gap can cost millions. Our Performance Value Tracking module, powered by Netscore®, gives you real-time insight into contract compliance, pending liabilities, and savings across every medium and market.

Our platform tracks:

Financial and quality-related agency commitments
All rebates, extras, and under-delivery (even 1%)
Contract compliance status in real time
Any pending value or liabilities
Savings by medium and market
Everything integrated in Netscore

More about Media Audit

Quadra™ Benchmarking

We take a deep dive into the agency work in your media buy, both in cost and quality aspects. For markets where we have the cost pools we can directly benchmark prices to the similar advertisers in spend. For markets where we get the access to syndicate research on competitive activity, we analyse jointly selected quality KPIs of campaigns to the whole market or to the quality pools in the absence of total market data – all of that in our sophisticated software platform to manage that for any medium in any market - Quadra. Thanks to this approach we are able to quantify the performance of the campaigns vs. not only competitors but the total market.

It optimises investments between communication channels and activities, as well as within these channels. For example, for TV: Based on previous ROI, carry-over of TRP ad price, it plans how much budget is most optimal, what levels of weekly TRPs should be planned, and how to plan the breaks. Depending on the data granularity, it can also suggest the best TV channel split. Thus, it also helps with negotiations with media owners.

(Free PDF Guide)

What advertisers need to know about media auditing

Media auditing is a discipline that ensures your media investments are transparent, efficient, and delivering the value you expect and pay for, it is not cost cutting.

(Free PDF Guide)

How to Choose the Right Media Audit Agency to Run Your Pitch

Choosing the right media auditor sets the tone for your entire pitch. Pick one who’s strategic, transparent, and focused on long-term value - not just short-term savings.

Audit Certification

Some of our clients require certification of the audit performance and we are more than happy to provide one stating the time and scope of the work delivered.

What our clients say

Petrol d.d. collaborated with the company STARS on an independent audit of media buying efficiency in Croatia. Since, at that time, we had been conducting media buying in this market partly directly, without the support of a media agency, we wanted to obtain a professional and objective assessment of how effective we had been in achieving our communication and business goals. STARS prepared a comprehensive review – both from a qualitative perspective (whether we chose the right channels, formats, and target groups) and from a quantitative perspective (what we actually achieved with a given budget compared to market standards and best practices).

The results and recommendations of the audit were presented professionally, transparently, and with clear reasoning, which significantly contributed to credibility and to the acceptance of the findings by the local teams. In addition to evaluating the current situation, the analysis also offered concrete guidelines for optimizing future activities. The cooperation with STARS provided us with a valuable insight into our own processes and gave us additional assurance that our future investments will be even more effective.

Mojca Avšič

Marketing & digital sales, Executive Director at Petrol

The STARS team has proven to be a reliable partner in the field of media monitoring.

Their service stands out for its comprehensiveness, reflecting a high level of professionalism and deep expertise in the specifics of media buying - an aspect that is particularly important in today’s constantly evolving advertising landscape. We especially value their strategic insight, tailored approach, and advisory role, all aimed at enhancing the effectiveness of our marketing activities.

Tjaša Kolenc Filipčič

Executive Director for Marketing & Corporate Communications and Customer Experience @Zavarovalnica Triglav

The scope for which STARS was contracted for can be summarised as annual tracking o| media pricing & buying performance including AVBs/rebates/pay-factors and quality for all 12 Deutsche Telekom business-to-consumer subsidiaries in Europe across multiple agencies used in our media roster (...)

STARS has been an efficient and disciplined media auditing & consulting partner to DTAG. The STARS team has demonstrated a modern, innovative approach to auditing media, especially for a large-scale and sophisticated business like DTAG.

Gerhard Louw

Head of International Media Management @Deutsche Telekom

Contact us

Stars Adria - Ljubljana & Zagreb & Beograd

We’d love to hear from you. Whether you’re exploring a one-time audit or long-term media consulting, our senior team is here to help.

Get in touch, book a free strategic call, or drop us a message - and we’ll get back to you shortly.

Barbara Modic

Vesna Marđonović