Choosing the Best CTV Ads Agency in the US: A DV360 Buyer's Guide

Why CTV Deserves a Specialist Agency

Connected TV (CTV) has moved from an experimental line item to a core channel in most US media plans. Viewers have shifted to streaming, premium publishers have opened up programmatic inventory, and platforms like Display & Video 360 (DV360) now give buyers direct, biddable access to living-room screens at scale.

But CTV is not just "video on a bigger screen." It has its own supply dynamics, measurement gaps, fraud vectors and creative requirements. That's why more US brands are searching for the best CTV ads agency rather than bolting streaming onto a generalist media plan.

This guide breaks down what actually separates strong CTV partners from the rest — and how to evaluate them if you're buying through DV360.

What a Great CTV Agency Should Deliver

A capable Connected TV partner does more than launch campaigns. The best agencies operate across four pillars:

• Inventory access and quality — direct publisher relationships, private marketplace (PMP) deals, and clean open-exchange supply on real CTV apps, not mislabelled mobile or desktop video.
• Measurement and incrementality — the ability to connect CTV exposure to outcomes, not just impressions and completion rates.
• Frequency and reach management — controlling how often the same household sees your ad across apps and devices.
• Transparency — clear reporting on where ads ran, what you paid in media versus fees, and how supply paths were chosen.

If an agency can't speak fluently to all four, treat that as a red flag.

Inventory: The Foundation of CTV Performance

CTV supply varies enormously in quality. The strongest agencies build a supply strategy rather than simply opening the exchange floodgates. Look for partners who can:

• Curate app-level allow lists and block lists for brand suitability.
• Secure PMP and programmatic guaranteed deals with premium streamers and broadcaster platforms.
• Verify that inventory is genuine CTV — running on a television device via a streaming app — using app bundle IDs and supply-chain signals.

DV360 gives buyers deep controls here, from deal management to detailed inventory reporting. A good partner knows how to use them; a great one has the publisher relationships to negotiate better access. Our DV360 managed services team focuses heavily on this supply curation layer.

The DV360 Advantage for CTV

DV360 is one of the most powerful platforms for running CTV at scale in the US, and it's a common reason brands seek a specialist partner. Key strengths include:

• Unified buying across CTV, YouTube, online video and display in one platform, which simplifies cross-channel frequency management.
• Access to YouTube and Google TV inventory alongside third-party streaming supply.
• Deal and inventory controls for building curated, brand-safe CTV supply paths.
• Integration with Google Marketing Platform for audience activation and measurement.

The catch: DV360 is a professional-grade tool that rewards expertise. Many teams either lack a seat or lack the in-house resource to run it well. That's where choosing the right engagement model matters.

Engagement Models Compared

Different brands need different levels of support. Here's how the common options compare:

Model	Best for	Who runs the campaigns
Self-serve seat	Teams with in-house traders wanting full control	Your team
Co-managed	Teams building capability but wanting expert backup	Shared
Fully managed	Teams wanting outcomes without operational overhead	The agency
Partner account	Brands needing platform access without a direct contract	The agency

If you're weighing these up, our DV360 self-serve account and co-managed services pages explain how each works in practice.

Measurement: Move Beyond Completion Rates

Too many CTV campaigns are judged on video completion rate (VCR) alone. High completion is expected on the big screen — it tells you little about business impact. The best US CTV agencies push measurement further:

• Incrementality testing using geo experiments or holdout groups to isolate CTV's true contribution.
• Cross-device and outcome measurement connecting CTV exposure to site visits, app installs or conversions where privacy-safe methods allow.
• Reach and frequency reporting at the household level, not just impression counts.
• Brand lift studies for upper-funnel objectives.

Ask any prospective agency how they would prove CTV worked for your objective. A vague answer usually means vague results. For a deeper look at connecting exposure to outcomes, see our writing on measurement and analytics.

Brand Safety and Fraud in CTV

CTV is a premium environment, but it is not automatically safe. Common risks include:

• Spoofed inventory where non-CTV traffic is misrepresented as premium streaming.
• App-level suitability issues, where your ad runs beside content that clashes with your brand.
• Inflated or invalid impressions from poor-quality supply paths.

Strong agencies mitigate this with app-level transparency, third-party verification, curated deals and supply-path optimisation. In CTV, buying from fewer, better-vetted sources almost always beats chasing the cheapest CPMs on the open exchange.

Frequency: The Silent CTV Problem

Because CTV supply is fragmented across many apps and devices, viewers are easily over-exposed to the same ad. This wastes budget and irritates audiences. The best agencies manage frequency deliberately by:

• Consolidating buys within a single DSP like DV360 to enable cross-app frequency caps.
• Setting household-level caps rather than device-level where possible.
• Rotating creative to reduce fatigue during longer flights.

Ask how a prospective partner controls frequency across your full video footprint, including YouTube. If the answer is "we cap per line item," you'll likely overpay for repeat impressions.

How to Evaluate a CTV Agency: A Practical Checklist

Use these questions during selection:

• Can you show app-level inventory reporting for a live CTV campaign?
• What premium PMP and programmatic guaranteed deals do you have access to?
• How do you verify inventory is genuine CTV?
• What is your standard approach to incrementality or lift measurement?
• How do you manage cross-app and household frequency?
• How transparent are your fees and media costs?
• Do we retain ownership of the DV360 seat, data and deals?

That last point matters more than many buyers realise. Data and account ownership affect your long-term flexibility. Our DV360 partner account model is designed to give brands access with clear ownership terms.

Transparency and Fees

The best CTV agencies are clear about where your money goes — the split between working media and service fees, how supply paths are chosen, and what performance you're getting for the spend. Beware opaque "blended" pricing that hides margin inside media costs. You should always be able to answer: how much reached actual inventory, and how much went to fees?

You can review how we structure engagements on our pricing page and explore the full range of support on our services overview.

Bringing It Together

The best CTV ads agency in the US isn't the one with the flashiest deck — it's the one that combines premium inventory access, rigorous measurement, disciplined frequency management and genuine transparency, all executed on a platform built for scale like DV360. Match those capabilities against your objectives and internal resourcing, and the right partner becomes clear.

Talk to a CTV Specialist

If you're planning or scaling Connected TV in the US and want a partner who runs DV360 with transparency and measurable outcomes, we can help. Get in touch with our team to discuss your CTV goals and the right engagement model for your business.