<b>Co-marketing ROI: why joint campaigns resist clean measurement</b>

<b>Co-marketing ROI: why joint campaigns resist clean measurement</b>

Co-marketing — two vendors or a vendor and a partner running a campaign together — is among the hardest channel activities to evaluate, and the difficulty is fundamental, not a tooling gap.

<b>The attribution overlap problem.</b> When two brands co-host a webinar, both claim the resulting pipeline in their own CRMs. Per studies of joint go-to-market, double-counting routinely inflates reported co-marketing pipeline by a meaningful margin, because neither party deducts the other's claimed influence.

<b>The counterfactual problem.</b> ROI requires knowing what would have happened without the campaign. Co-marketing reaches a blended audience, so isolating incremental lift from the partner's audience versus your own existing reach is rarely possible without holdout groups — which co-marketing's shared-audience nature makes hard to construct.

<b>What measures cleaner.</b> Net-new logo overlap (accounts neither party had touched), assisted-pipeline tagged at campaign source, and post-campaign win-rate deltas on co-touched accounts. These proxy incrementality better than raw lead counts.

<b>Trade-off:</b> the campaigns easiest to measure — gated co-branded content with trackable forms — tend to be lowest in genuine incremental value. The high-value activities (joint analyst briefings, executive roundtables) are precisely the ones that resist tracking.

<b>Open questions:</b> can two vendors agree on a shared attribution ledger before a campaign to pre-empt double-counting? The governance problem, not the analytics problem, seems to be the binding constraint.