Best CTV DSPs in 2026: Trade Desk, DV360, Amazon DSP and Self-Serve Compared

US connected TV ad spend reaches roughly $38 billion in 2026 on eMarketer's forecast, up about 14% year over year — and four sellers (Amazon, Disney, YouTube and Roku) each clear $3 billion of it. Choosing a CTV DSP is really choosing which of those inventory pools you can reach, and on whose data.

Start with where the money actually is

Most CTV DSP comparisons open with a feature grid. That is backwards. A DSP is a pipe to inventory, and the inventory is concentrated in a handful of sellers. Work out which sellers matter for your audience first, and the DSP shortlist writes itself.

Here is where US CTV ad revenue sits in 2026, per eMarketer's published forecasts.

Two things follow. First, no single DSP gives you clean access to all of it — YouTube and Prime Video in particular are substantially walled. Second, the "best" DSP is entirely a function of which rows in that table your audience actually watches.

The Trade Desk: the default for independent, multi-publisher CTV

The Trade Desk is the independent buy-side platform most agencies default to for CTV, and the reason is inventory breadth rather than interface quality. It integrates directly with a wide set of streaming publishers — Hulu, Peacock, Tubi, Pluto and a long tail beyond them — which makes it the most practical single route to the fragmented middle of the market.

It is also the platform where supply-path and identity decisions are most in your hands, which cuts both ways: more control, more configuration, more opportunity to get it wrong. It rewards buyers who actually manage the buy.

Choose it when: you need breadth across many streaming publishers, you are running a genuinely independent buy, and someone is actively managing supply paths and frequency.

DV360: strongest when YouTube is the point

YouTube is close to 12% of US CTV ad revenue on its own, and DV360 is how you buy it programmatically at scale alongside the rest of Google's network. If YouTube CTV is central to the plan, this is not really a choice.

The trade-off is the mirror image of The Trade Desk: excellent access to Google's own inventory, weaker access to the premium streaming apps outside it. Buyers who need both frequently run both, which reintroduces the cross-platform frequency problem discussed in our CTV frequency capping framework.

Choose it when: YouTube and Google inventory carry the plan, or you are already operating inside the Google stack.

Amazon DSP: the data advantage, if your category fits

Amazon DSP's case is not inventory breadth. It is the retail data layered underneath it. Prime Video reports more than 315 million global ad-supported viewers, and Amazon can connect exposure to purchase behaviour in a way no independent DSP can replicate.

That closed loop is genuinely valuable if you sell something Amazon sells. It is much less compelling for a B2B services business or a local operator, where the shopping signal has nothing to attach to. Retail and CPG advertisers should read this alongside our breakdown of retail media networks, because the two buys increasingly overlap.

Choose it when: you sell physical product, especially through Amazon, and closed-loop measurement is worth more to you than open-web breadth.

Self-serve platforms: the realistic entry point for smaller budgets

The enterprise DSPs above assume a managed-service relationship or an in-house trading team. For advertisers testing CTV with modest budgets, self-serve platforms — StackAdapt and Roku's own ads manager among them — are the more realistic starting point. They span CTV alongside display, native, audio and DOOH from a single interface, and they do not assume you have a trader on staff.

What you give up is supply-path transparency and the depth of control that makes the enterprise platforms worth their overhead. For a first CTV test, that is usually an acceptable trade.

Choose them when: you are validating whether CTV works for you at all, before committing to platform overhead.

If you are not sure which of these your current buy is actually running through — and a surprising number of advertisers on managed service do not know — a free audit of your programmatic setup will tell you where your money is going and what it is paying in platform fees before it ever reaches inventory.

What this comparison deliberately does not tell you

You will find articles quoting precise DSP market-share percentages to the decimal. We have left them out. Those figures are not audited, they vary widely by methodology and by whether "spend" means gross or net, and we could not trace the common ones to a primary source. Publisher ad revenue is reported and forecastable; buy-side platform share largely is not.

What we can say without qualification is that inventory access and data model are the two axes that actually decide the answer, and both are checkable before you sign anything.

How to run the evaluation

This article covers which platform fits which buyer. The structured process for actually evaluating one — use case, inventory breadth, first-party data activation, supply-path transparency, fee structure, cookieless readiness and support — is a separate exercise, and we have written it up as a 7-point DSP evaluation framework. Use this piece to build the shortlist and that one to test it.

Two things worth insisting on regardless of platform. Ask for the full fee stack in writing, including platform fee, data fees and any supply-path markup, because the CPM you are quoted is rarely the CPM you pay. And ask what identity graph enforces household-level frequency, because the answer determines whether your caps mean anything at all. Our 2026 CTV CPM benchmarks give you the numbers to push back with.

Methodology and sources

Seller-level revenue figures are eMarketer forecasts for 2026 as published in its CTV and converged TV coverage, retrieved September 2026. The US CTV total of approximately $38 billion and roughly 14% annual growth are eMarketer's. Platform capability descriptions reflect publicly documented integrations and product positioning. We have excluded DSP market-share percentages because we could not verify them against a primary, audited source; where you see those figures elsewhere, ask what the denominator is.

Frequently asked questions

Which DSP is best for CTV advertising in 2026?

There is no single best one, because they buy different inventory. The Trade Desk offers the broadest independent access to streaming publishers. DV360 is the route to YouTube, which is close to 12% of US CTV ad revenue on its own. Amazon DSP wins on retail data if you sell physical product. Self-serve platforms suit advertisers testing CTV before committing to platform overhead.

Do I need a separate DSP for CTV, or can I use my display DSP?

Most major DSPs sell CTV alongside display, so a separate platform is rarely required. The question is whether yours has real access to the streaming publishers your audience watches, and whether it can enforce frequency at household level rather than device level. Both are worth verifying before assuming coverage.

What is the minimum budget to run CTV programmatically?

It depends far more on the platform than on the channel. Enterprise DSPs generally assume managed service and a meaningful monthly commitment; self-serve platforms will take much smaller budgets. The practical constraint is not the platform minimum but whether your budget buys enough impressions in your target audience to produce a readable result.

Can I buy YouTube CTV through The Trade Desk?

Not in the way you can buy it through DV360. YouTube inventory is substantially reserved to Google's own buying stack, which is why advertisers who need both YouTube and the wider streaming market commonly run two platforms — and then have to solve frequency across them.

How do I compare DSP costs fairly?

Ask every vendor for the same thing in writing: platform fee, data fees, any supply-path or inventory markup, and what is included in the quoted CPM. Comparing headline CPMs across DSPs without that breakdown is meaningless, because the quoted number is measuring different things at each one.

Where to take this next

If you want help matching a DSP to your actual audience rather than to a feature list, book a 30-minute intro call with Ryan — no pitch, just a straight read on your options. Or request a free audit and we will show you what your current setup is costing in fees before inventory. You can also read how we approach programmatic buying and audience targeting, or get in touch.