Quick answer: use a direct IO when you need reserved access to a specific publisher, program or event; use a private marketplace, or PMP, when you want curated CTV supply with DSP-based targeting and optimization; use the open auction when reach, flexibility and fast testing matter more than exact placement certainty.
Most serious CTV plans should not force one method to do every job. A practical mix often uses PMPs as the quality-controlled core, open auction inventory for incremental reach and direct IOs for a small number of must-have placements.
The buying route affects more than CPM. It changes what inventory is available, how prices are set, whether delivery is guaranteed, how much targeting you retain, what data appears in the DSP and how confidently you can explain where ads ran.
CTV direct IO vs PMP vs open auction at a glance
Buying method | Best for | Price and delivery | Control | Main trade-off
|
|---|---|---|---|---|
Direct IO | Reserved premium placements, sponsorships, tentpole events and publisher-specific commitments | Usually negotiated directly; delivery may be reserved or guaranteed under the contract | High control over publisher and package, but platform-level optimization may be limited | Higher commitment, slower setup and less cross-publisher flexibility |
PMP | Premium or curated supply bought through a DSP with audience, frequency and optimization controls | Deal-specific floor or fixed price; may be non-guaranteed or guaranteed depending on deal type | Strong balance of supply control and programmatic execution | A deal ID does not automatically prove quality, scale or exclusivity |
Open auction | Fast launch, broad reach, testing and incremental scale | Dynamic auction; delivery is not reserved | High bidding flexibility, but less certainty about exact supply paths | Requires tighter allowlists, exclusions, fraud controls and reporting |
These labels describe commercial access, not a universal quality ladder. Premium inventory can appear through more than one route. A poorly structured PMP can be less useful than a well-governed open-auction line item. A direct IO can secure valuable supply but still create reporting or frequency gaps.
What is a direct IO for CTV?
A direct insertion order, or direct IO, is a contract negotiated between the advertiser or agency and the publisher, network, streaming service or sales representative. It defines the inventory package, dates, price, delivery terms, targeting, creative requirements, measurement and make-good conditions.
Direct IOs are commonly used when the media itself is the priority. Examples include a major live sports package, a seasonal sponsorship, a publisher homepage or channel takeover, or guaranteed delivery against a named streaming service.
When direct IO is the strongest fit
You need a named publisher, show, content genre, live event or sponsorship.
The inventory is unavailable or materially different through your DSP.
You need committed delivery during a fixed period.
The publisher offers custom creative, integrations or measurement.
Your budget can support the commercial minimum and operational work.
What to verify before signing
Ask whether the publisher owns the inventory, represents it exclusively or aggregates supply from other sellers. Confirm the apps, devices, countries and content environments included. Put completion reporting, invalid-traffic treatment, cancellation terms, underdelivery remedies and make-goods in writing.
Also clarify how the IO interacts with the rest of the media plan. If delivery sits outside your main DSP, you may not have unified frequency control, audience suppression or bid-level reporting. A guaranteed impression is useful only if it reaches the intended audience without creating waste elsewhere.
What is a PMP for CTV?
A private marketplace is a deal-based programmatic buying route. A seller packages inventory and makes it available to selected buyers through a deal ID. The buyer activates that deal in a compatible DSP.
PMP is an umbrella term. The commercial mechanics can vary:
Private auction: invited buyers compete, usually above a negotiated floor.
Preferred deal: the buyer receives first-look access at a negotiated fixed CPM, but delivery is not guaranteed.
Programmatic guaranteed: price and volume are agreed in advance, while serving and reporting use programmatic pipes.
Platform labels differ, so the deal terms matter more than the shorthand. Confirm whether volume is guaranteed, whether the price is fixed, who can bid and what happens if the seller cannot deliver.
Why advertisers use PMPs for CTV
PMPs can combine publisher or package-level supply decisions with DSP controls. The buying team can apply audience targeting, pacing, frequency caps, creative rotation and conversion or brand-lift measurement while using a narrower supply set than the open auction.
This makes PMPs a practical default for many mid-market CTV campaigns. They provide more control than broad auction buying without requiring every publisher relationship to become a separate manual IO.
A deal ID is not a quality certificate
Before activation, inspect the deal composition. Ask for app or channel lists, seller and reseller details, geographic availability, device mix, content signals, floor price and expected scale. Verify whether the deal is truly publisher-direct, curated by an SSP or assembled across multiple intermediaries.
Then test it. A deal can be technically active but produce little eligible inventory because of geography, audience restrictions, creative approval, bid settings or floor-price pressure. Deal health should be monitored like any other supply source.
What is open-auction CTV buying?
In an open auction, eligible inventory is offered to a broad group of buyers through programmatic exchanges. The DSP evaluates each opportunity and bids according to the campaign's audience, context, price and optimization rules.
The open auction can deliver broad reach and fast learning. It lets buyers test multiple supply sources without negotiating each relationship first. It can also help fill geographic, audience or pacing gaps left by a narrower direct or PMP strategy.
When open auction makes sense
You need to launch quickly.
You want broad reach across many apps or channels.
You are testing audience, creative or geographic performance.
You need incremental scale beyond direct and deal inventory.
Your team has the tools and time to manage supply quality.
The control work open auction requires
Use app and publisher reporting, allowlists or carefully reviewed blocklists, category exclusions, invalid-traffic controls and supply-path analysis. Review seller relationships through ads.txt or app-ads.txt, sellers.json and SupplyChain object signals where available. These standards improve transparency, but they do not replace commercial due diligence or campaign monitoring.
Do not optimize only toward the lowest CPM. Cheap inventory can create apparent efficiency while reducing completion quality, attention, content fit or incremental reach. Compare supply sources using completion rate, unique reach, frequency, invalid traffic, cost per completed view and business outcomes.
AdGeeks can compare direct, PMP and auction access across your target markets, then build the DSP and supply-control plan.
How the 3 methods compare in practice
1. Inventory certainty
Direct IO usually offers the clearest contractual commitment to a named publisher or package. Programmatic guaranteed can offer similar reservation through a programmatic workflow. Non-guaranteed PMPs provide preferred or limited access, not assured delivery. Open auction inventory is available only when eligible impressions enter the auction and your bid wins.
2. Targeting and optimization
PMP and open-auction buying usually retain the strongest DSP-level controls. Direct IO targeting depends on the publisher's systems and contract. Some direct buys support rich first-party publisher data; others provide only broad demographic, geographic or content packages.
3. Frequency management
A DSP can usually apply frequency rules across line items it controls, but not automatically across separate publisher ad servers or walled gardens. Direct IOs can therefore create cross-platform duplication. Ask for publisher frequency controls and plan for consolidated reach analysis.
4. Transparency
Direct contracts can offer clear commercial provenance, but reporting granularity still varies. PMPs can expose deal-level and sometimes app-level data. Open auction can provide detailed logs, yet the supply chain may include more intermediaries. Transparency depends on both the route and the reporting rights you negotiate.
5. Price
Open auction often has the widest price range. PMPs usually carry a negotiated floor or fixed price for access to selected supply. Direct IOs may include a premium for reservation, scarcity, service or custom integrations. Compare total cost, not media CPM alone. Include DSP, data, verification, ad-serving, measurement and management fees.
6. Speed and workload
Open auction is usually fastest to activate. PMPs require deal discovery, negotiation, setup and troubleshooting. Direct IOs add contracting, billing, creative approvals and publisher coordination. Operational cost rises quickly when a plan contains many small direct agreements.
A practical decision framework
Start with the non-negotiable outcome. Is the goal guaranteed presence, premium publisher access, audience reach, efficient testing or incremental scale?
Check actual inventory availability. Do not assume a service is available in every DSP, country or deal type. Verify the current route.
Set the control requirement. Decide which apps, publishers, sellers, content types and intermediaries are acceptable.
Map data and measurement. Confirm audience activation, event tracking, brand-lift options, log-level data and reporting dimensions before launch.
Compare total economics. Model media, platform, data, verification, creative, measurement and management costs.
Plan overlap. Define frequency and reach rules across DSP, PMP, direct publisher and walled-garden activity.
Recommended buying mix by scenario
Scenario | Recommended starting route | Why |
|---|---|---|
National awareness campaign with flexible publisher mix | PMP core plus controlled open auction | Balances curated supply with incremental reach and DSP optimization |
Live sports, launch event or fixed sponsorship | Direct IO or programmatic guaranteed | Secures a specific moment, placement or delivery commitment |
New CTV test with limited history | Small PMP set plus controlled open auction | Creates a quality baseline while revealing where scalable supply exists |
Strict publisher or content requirements | Publisher-direct PMP, programmatic guaranteed or direct IO | Prioritizes provenance and placement control |
Regional or niche audience with limited supply | Open auction supported by targeted PMPs | Preserves reach while testing narrower packages |
Large campaign needing cross-publisher frequency controls | PMPs and auction through a primary DSP, with selective IOs | Keeps more delivery under one optimization and reporting layer |
Questions to ask every CTV seller or agency
Who owns or directly represents the inventory?
Which apps, channels, devices, countries and content types are included?
Is the deal auction-based, preferred, fixed-price or guaranteed?
What is the minimum commitment, floor price and expected eligible scale?
Can we see app, publisher, seller, exchange and deal-level reporting?
Which fees sit outside the quoted media CPM?
How are invalid traffic, app spoofing and unauthorized reselling handled?
Can we use first-party audiences, exclusions and frequency controls?
What happens if the deal underdelivers or the IO misses its guarantee?
How will reach and frequency be deduplicated across buying routes?
Common mistakes to avoid
Treating every PMP as publisher-direct
Some PMPs are curated packages assembled by an intermediary. That can still be valuable, but it is different from a direct publisher relationship. Ask who constructed the deal and which sellers are authorized.
Assuming direct IO always means better quality
A contract provides commercial clarity, not automatic audience quality or incremental reach. Evaluate the placement, targeting, reporting and overlap with the wider plan.
Using open auction without a supply policy
Broad access needs clear governance. Define acceptable inventory, authorized sellers, exclusion rules and escalation procedures before spend begins.
Comparing CPMs that include different costs
One quote may include technology and management while another shows media only. Normalize fees before deciding that one route is cheaper.
Forgetting creative approval and technical compatibility
CTV deals can fail to scale when video duration, VAST requirements, bitrate, tracking, language or publisher approval do not match. Complete creative QA before the flight starts.
How AdGeeks approaches CTV deal strategy
AdGeeks starts with the audience, market and outcome, then verifies which publishers and streaming environments are actually reachable through the available DSPs and deal routes. The plan separates must-have supply from useful incremental supply.
For PMPs, the team reviews deal terms, seller paths, app composition, floor prices and expected scale before activation. For open auction, it builds supply controls and monitors placement-level performance. For direct IOs, it checks how the contract affects frequency, measurement and reporting across the rest of the plan.
This route-neutral approach avoids paying a premium simply because inventory carries a deal ID. It also avoids sacrificing valuable reach just because an impression is available through the open auction.
Useful next steps include the CTV minimum budget guide, the premium CTV inventory map, the brand safety and supply-path checklist, and the reach and frequency planner.
Get a route comparison across direct IO, PMP and open-auction inventory, with DSP access and supply-quality controls included.
Frequently asked questions
Is a PMP the same as a direct IO?
No. A PMP is activated programmatically through a deal ID and DSP. A direct IO is a contract with a publisher or sales representative. Programmatic guaranteed deals can combine reserved delivery with a programmatic workflow, so they sit closest to the middle.
Is PMP inventory always better than open-auction inventory?
No. A PMP narrows access and sets commercial terms, but quality depends on the apps, publishers, sellers and supply paths inside the deal. Verify the package and compare its results against controlled auction supply.
Does a direct IO guarantee delivery?
Only if the contract says so. Review the impression commitment, targeting conditions, pacing, underdelivery remedies and make-good terms. Some direct arrangements are preferred access rather than guaranteed volume.
Can one CTV campaign use all 3 buying methods?
Yes. A blended plan can use direct IOs for must-have placements, PMPs for the controlled core and open auction for incremental reach. The main challenge is managing overlap, frequency and reporting across systems.
Which method gives the best CTV measurement?
There is no universal winner. DSP-based PMP and auction buying often provide consistent cross-supply reporting. Direct publishers may offer unique first-party data or studies. Choose the route only after confirming the exact metrics, dimensions and data rights.
Which method should a mid-market brand start with?
For many mid-market brands, a small set of vetted PMPs plus tightly controlled open-auction inventory is the most practical start. Add direct IOs when a specific publisher, event or guaranteed placement is essential.
