How to Choose the Top CTV Ads Agency in the USA

Why Connected TV Deserves a Specialist Agency

Connected TV (CTV) has moved from an experimental line item to a core channel in most serious US media plans. Audiences have shifted their premium viewing to streaming, and advertisers now expect the reach of linear TV with the precision, addressability and measurability of digital.

But CTV is deceptively complex. Inventory is fragmented across streaming apps, device manufacturers, ad-supported services and live sports. Supply paths vary in quality. Frequency can spiral out of control across overlapping publishers. And measurement rarely works the way it does in standard display or search.

That's why choosing the right CTV ads agency matters. The best partners don't just "run CTV" — they engineer reach, control frequency, protect your brand and prove incremental impact. This guide breaks down how to evaluate a top CTV agency in the USA and where a platform like Display & Video 360 (DV360) fits.

What Separates a Top CTV Ads Agency

Many agencies claim CTV capability. Fewer can demonstrate the operational depth that consistently delivers efficient, measurable outcomes. Here's what genuinely top-tier partners bring.

1. Premium, transparent inventory access

Strong CTV agencies buy through channels that give you visibility into where your ads run. That means:

• Direct publisher deals and Programmatic Guaranteed (PG) arrangements
• Curated private marketplaces (PMPs) with vetted streaming apps
• Clear reporting on app-level and domain-level placement
• Controls to avoid low-quality or misrepresented supply

Ask any prospective agency to explain exactly how your budget reaches the screen — and how many hops sit between the buy and the impression.

2. Deep DV360 and Google Marketing Platform expertise

DV360 is one of the most powerful demand-side platforms for CTV in the US market. It combines access to YouTube (including YouTube on the big screen via connected devices) with a broad ecosystem of third-party streaming inventory through exchanges and direct deals.

A top agency should be able to articulate how they:

• Structure DV360 insertion orders and line items for CTV goals
• Combine YouTube and third-party CTV within a single frequency strategy
• Use audience and first-party data responsibly across the buy
• Optimise toward view-through and downstream outcomes, not just completed views

If you want to understand the platform options before committing, our DV360 services overview explains how self-serve, co-managed and fully managed models differ.

3. Cross-publisher frequency management

The single biggest complaint about CTV is over-frequency — the same household seeing the same ad dozens of times across different apps. A capable agency consolidates buying so frequency can be capped at the user or household level wherever the data allows, rather than app by app.

Centralising CTV within DV360 is one of the most effective ways to control this, because it reduces the number of siloed buys competing for the same impressions.

4. Rigorous measurement and incrementality

Completed video views and impressions are table stakes. The best CTV agencies push toward business impact:

• Brand lift and awareness studies
• Incremental reach versus linear TV
• Cross-device attribution and site/app visitation
• Foot-traffic or conversion lift where relevant

Measurement design should be agreed before the campaign launches — not retrofitted afterwards.

Agency Models: Which One Fits Your Team

There's no single "right" way to work with a CTV agency. The model should match your internal maturity, resourcing and desire for control.

Model	Best for	You control	Agency controls
Self-serve support	In-house teams with traders	Day-to-day buying	Setup, training, escalation
Co-managed	Teams building capability	Strategy & oversight	Execution & optimisation
Fully managed	Lean teams, fast scale	Goals & budget	End-to-end delivery
Partner seat access	Agencies & advertisers needing platform access	Campaigns	Billing, support, governance

If you want the platform in-house but need enablement, a DV360 self-serve account gives your team the seat with expert support behind it. If you'd rather hand over execution, DV360 managed services covers strategy through optimisation. Teams that want a blend often prefer co-managed services, keeping strategic control while offloading the operational load.

How to Evaluate CTV Agencies: A Practical Checklist

Use these questions in every pitch or discovery call. The quality of the answers tells you more than any award or logo wall.

Inventory and supply

• Which supply paths do you use, and why?
• Can I see app-level reporting for my campaigns?
• How do you avoid fraudulent or misrepresented CTV inventory?

Platform and buying

• How do you use DV360 for CTV specifically?
• How do you combine YouTube CTV with third-party streaming?
• How is frequency managed across publishers?

Data and targeting

• How do you activate my first-party data compliantly?
• What audience strategies work for my category and goals?

Measurement

• What KPIs do you recommend and why?
• How do you prove incremental reach beyond linear?
• What does reporting cadence and transparency look like?

Commercials and transparency

• How is your fee structured?
• Do I retain ownership of the ad account and data?

Account and data ownership is a critical point that's easy to overlook. Working through a transparent DV360 partner account helps ensure governance, billing and access are handled cleanly.

Common CTV Mistakes a Good Agency Prevents

Even experienced marketers stumble on CTV. A strong partner actively steers you away from these traps:

• Treating CTV like display. Creative, pacing and measurement all behave differently on the big screen.
• Buying in silos. Separate buys across DSPs and publishers destroy frequency control and inflate waste.
• Chasing completion rate alone. A 100% completion rate means little if it isn't reaching incremental audiences or moving the business.
• Ignoring creative requirements. CTV has strict specs; poor creative delivery can crater your served impressions.
• Skipping brand safety controls. Premium environments still need content and context safeguards.

Where DV360 Fits in a Modern CTV Strategy

For US advertisers, DV360 is a natural hub for CTV because it unifies planning, buying, frequency management and measurement across YouTube and third-party streaming in one place. That consolidation is precisely what makes frequency control, deduplicated reach and cleaner reporting achievable.

A top CTV agency uses DV360 not as a checkbox but as an operating system for the channel — building audience strategies, negotiating deals, controlling supply paths and connecting outcomes back to business goals. Whether you run the platform yourself or lean on a managed team, the platform's breadth is a meaningful advantage.

To understand how different engagement models are structured, browse our full range of DV360 services or review pricing options to see which approach aligns with your budget and team.

Making the Decision

The "top" CTV ads agency isn't the one with the flashiest deck — it's the one whose inventory transparency, platform expertise, frequency discipline and measurement rigour match your specific goals. Prioritise partners who explain their supply paths openly, buy with intent inside DV360, and design measurement before launch rather than after.

Get those fundamentals right and CTV becomes one of the most accountable channels in your mix: the scale and impact of television, with the control and clarity of programmatic.

Talk to a CTV Specialist

If you're evaluating a CTV agency or want to strengthen how you buy Connected TV through DV360, we can help you build a plan grounded in transparency and measurable outcomes. Get in touch with our team to discuss your goals and the right engagement model for your business.