How to buy CTV inventory: direct, PMP and programmatic explained
Connected TV inventory reaches advertisers through three routes: direct deals with publishers, private marketplaces, and open programmatic exchanges. Each route trades price, control and scale differently. This guide explains how each one works, what to ask before committing budget, and which route fits which stage of CTV maturity.
The three routes in one view
Direct deals: you negotiate with a specific publisher or network for their inventory — fixed placements, agreed pricing, guaranteed delivery. Private marketplaces (PMPs): a publisher invites selected buyers to bid on their inventory programmatically — auction mechanics, but a curated room. Open programmatic: your DSP bids across exchanges on whatever CTV impressions match your targeting — maximum scale, minimum exclusivity.
None of the three is universally best. Serious CTV buyers typically blend them, shifting the mix as they learn which inventory performs.
Direct deals: control at a negotiated price
A direct deal buys certainty: specific apps or channels, specific positions in the break, a guaranteed volume over a flight. You know exactly where your ad runs, which is the strongest form of brand safety and the cleanest test environment. The cost is effort and price: each deal is negotiated, minimums are higher, and premium context commands premium rates.
Direct makes sense when you already know which inventory converts — a FAST channel whose audience matches your app, a platform placement that tested well programmatically. It is the graduation step, rarely the first step.
Private marketplaces: the middle path
A PMP keeps the plumbing of programmatic — your DSP, your targeting, your frequency caps — while restricting the room to vetted inventory and invited buyers. You get auction efficiency without open-exchange risk: the publisher is known, the supply path is declared, and the inventory cleared someone's quality bar before you saw it.
PMPs suit advertisers who want better inventory than the open exchange offers but lack the volume certainty to justify direct commitments. Ask what the deal actually includes — which apps, which positions, what floor price — because "PMP" covers everything from near-direct premium packages to lightly filtered exchange inventory.
Open programmatic: scale with a verification tax
Open exchange buying gives you the largest pool of CTV impressions and the most aggressive targeting and optimization tooling. It also gives you the most exposure to the channel's known problems: spoofed devices, mislabeled inventory, apps that exist only to generate ad calls, and resold supply chains where nobody can say whose screen your ad reached.
The tax is avoidable, not optional: buy only inventory with valid app-ads.txt and sellers.json paths, use an ads.txt-verified supply list, run third-party verification on a sample of impressions, and prune placements weekly by post-impression outcome data. Programmatic CTV without this discipline buys reach on paper and waste in practice.
What to ask any CTV seller
Five questions separate serious sellers from resellers. Which specific apps and channels are included — named, not categorized? What is the supply path — direct integration, or how many hops? What verification do impressions pass, and can your own verification vendor tag along? What reporting granularity do you get — per placement, per app, per hour? And what happens contractually when verification flags inventory you already paid for?
A seller who answers all five concretely is a seller you can test. Vague answers to question one or two end the conversation.
A sane first-budget approach
Start programmatic with tight supply filters and a bounded budget; the goal of the first flight is learning, not efficiency. Identify the placements and audience segments that produce downstream actions — installs, site visits, branded search lift. Then move the winners into PMPs or direct deals where volume and context are guaranteed, keeping a programmatic layer for scale and discovery.
This crawl-walk-run structure is how most mature CTV buyers actually operate, and it is deliberately unglamorous: the channel rewards verification discipline more than it rewards bold commitments.
Buying CTV through Mobadly
We sell CTV inventory we onboard directly from publishers — CTV apps and FAST channels that pass our verification review — and we run campaigns for advertisers with placement-level reporting and weekly source scoring. That means you get the supply-path transparency of a direct relationship with the operational simplicity of a managed buy.
To scope a campaign, register as an advertiser and tell us your app, your audience and your KPI. We come back with the inventory that fits and a test structure; terms are agreed individually, in writing, before anything runs.