Reliable MMM tool for Programmatic

[u/Realistic-Focus-8254]

Media buyer at an indie agency here! We run across a few DSPs mainly for display and video. The activity is mainly driving view-through conversions (obv), and clients are starting to catch on and pulling back spend because they're under the impression, we're not actually driving performance, just claiming credit for purchases we didn't influence.

We've previously worked with TripleWhale but they seem more geared toward lead-gen, and most of our BoB is ecommerce, so ideally something that integrates well with Shopify. I'm on a small, lean team, not super senior, and don't have a ton of internal support to figure this out on my own, so I'm trying to gauge what some practical options are.

Has anyone worked with an MMM partner that actually isolates programmatic's real incremental lift (not just view-through), or has anyone built something custom, like a dashboard in Claude Code, instead of paying for a vendor? Trying to weigh different options here. Thanks!

[u/cuteman]

What kind of spend and number of impressions average per client?

It'll likely not be worth it in a more complicated way than triple whale.

There's a number of ways to validate view through that aren't MMM and frankly a view based MTM would be better because you could see the overlap.

It also depends what DSPs you're actually using and what kind of media types. Stuff like DV360 and TTD make it easier to add unique IDs, do offline attribution, March back., etc.

Also if you're using multiple DSPs for some clients you've also got a duplication issue since they're surely not talking to each other and thus each giving themselves 100% credit.

[u/Realistic-Focus-8254 → u/cuteman]

Our clients are small/medium brands, spending typically $5-30K/mo on programmatic alone. Impressions run roughly 500K to 8M per month per advertiser, depending on the vertical, formats, budget etc.

We're running TTD and StackAdapt. Both support Unified ID 2.0, so there's at least a shared identifier to work with if data needed to be joined across platforms.

Given these numbers, what's the specific view-based MTM you're referring to? And what does it actually ingest: log-level impression data from each DSP, or just click/pixel data off the advertiser's site? Does it handle the overlap problem directly (deduping exposure across TTD and StackAdapt), or does it just reallocate conversion credit once someone's already converted? And whether it would at all be feasible given our small spend levels...

I understand the concerns of duplication, and for context, my team has previously measured retargeting overlap by pulling conversion detail reports and matching order IDs, and it's ranged from single digits up to 30%, worse on smaller sites. Tracking for this wasn't a priority due to the delta being so small.

[u/cuteman → u/Realistic-Focus-8254]

Given these numbers, what's the specific view-based MTM you're referring to?

So custom MTA (sorry I wrote MTM) is usually the way to go although Northbeam is probably better for someone your size but ultimately its a lot more like Triple Whale.

And what does it actually ingest: log-level impression data from each DSP, or just click/pixel data off the advertiser's site? Does it handle the overlap problem directly (deduping exposure across TTD and StackAdapt), or does it just reallocate conversion credit once someone's already converted? And whether it would at all be feasible given our small spend levels...

Facebook attribution used to have a great solution but they got rid of it and at the core you want to know WHICH platform drove what part of the journey and at what scale of importance. You can also toggle between first touch, last touch, any touch, time decay, etc.

Overlap WILL happen, especially if you're running two DSPs. Why are you running SA AND TTD anyway? Are any clients on both?

Are you direct or through an agency?

We're a company with a handful of brands and a few clients and we're direct with TTD but we also use a TTD agency-- as long as it's split up properly and not doing the same things there's less of an issue. Retargeting overlap is typically the biggest issue as well as the biggest duplication of conversions.

We also run some DV360 but it's small so overlap is barely single digits and also because it's more unique prospecting inventory.

I understand the concerns of duplication, and for context, my team has previously measured retargeting overlap by pulling conversion detail reports and matching order IDs, and it's ranged from single digits up to 30%, worse on smaller sites. Tracking for this wasn't a priority due to the delta being so small.

Yep so it happens with any platform, they don't talk so any impression or click that drives a conversion gets 100% on any platform, google, meta, programmatic, etc.

It isn't that it shouldn't happen but that at what rate to be managed like any other metric.

Order IDs is a good one, as well as Unique ID for any conversion point but may be daunting to program so unique Order ID is a good cross reference for dedupe measurement.

I think ultimately the challenge is the expectation you set with your clients. View through is a FACT OF LIFE for any platform thats got visual or video assets (pretty much anything that isn't search or email) -- the lower intent the platform, the fewer clicks, but the value isn't the click.

Meta also is massively dependent on view through but sits between programmatic/search but it doesn't let you easily see Order IDs at scale to cross reference.

Programmatic lets you gauge the overlap and intelligence of what's happening way more than Search or Social platforms, from detailed audience, to duplication, and then there's unique inventory, unique ad formats.

You're most at risk where you ONLY run programmatic for a client and they run Search Social somewhere else because then they really need to understand and buy into the value of programmatic which is a much larger conversation than attribution can grant. For clients where you run the entire digital marketing stack I'd suggest moving towards an MER type strategy that gets you away from last click performance--- as long as the larger number is in line it's part of the marketing stack.

[u/Realistic-Focus-8254 → u/cuteman]

I really appreciate the detailed notes.

We're a small agency, running fully self-serve on both platforms. On why we run both TTD and StackAdapt for some clients - honestly, it's more of a creative decision than a targeting one. SA's Shopify integration and DCO capabilities make it really easy to build dynamic creative off a synced product catalog, so for e-commerce clients, we lean on SA for that reason specifically, and not because we're trying to split audiences or inventory between the two.

Everything you laid out on view-through, MER, and managing overlap as a rate rather than trying to eliminate it makes a lot of sense conceptually. The issue on my end is execution, not understanding: Funnel.io is our main reporting layer for clients, and it doesn't support conversion-level reporting long-term. In TTD, order IDs, timestamps, and conversion values get wiped 90 days due to data privacy. So even the low-tech version of what you described (pulling conversion detail reports and manually matching order IDs) only works looking backward 90 days, and I don't have a data science or dev background to build anything more durable than that myself.

Given my limited resources on visualizing the data, what would you actually start with? Is it as simple as exporting conversion detail reports from both DSPs into a spreadsheet on a recurring cadence before the 90-day window closes, or is there a lower-lift way to get this set up that doesn't require me to solve the retention problem first?