Comparison
Realeyes and PreTestAds agree on the thesis — attention is the metric that gates everything else — and disagree on the instrument. Realeyes measures real humans watching through their webcams. PreTestAds predicts the human response with a model trained on brain data. Observation versus prediction.
Realeyes pioneered webcam-based attention and emotion measurement: panelists opt in, watch your ad, and computer vision reads where their attention and expressions actually go. It's behavioral ground truth — real disengagement from real people, aggregated into attention scores used by major platforms and advertisers. When stakeholders need "humans actually watched this," observation carries a weight prediction can't match.
PreTestAds skips recruitment entirely. AdCortex™ was trained on fMRI recordings of brains responding to video — it predicts the engagement response instead of collecting it, returning a percentile score against 76 top TikTok performers, Hook Strength, drop-off timing, and the full curve in minutes. No panel windows, no per-study fieldwork costs, no minimum spend: which is what makes it viable to score every single variation you generate rather than the two you can afford to field.
Observation is the stronger evidence for a finished hero asset — it's real behavior. But observation can't iterate at creative speed: every new cut means another panel, another wait, another invoice. Prediction inverts the economics — the marginal test costs a credit and arrives before your coffee cools — which changes behavior: teams actually test every refresh, every hook variant, every opening-seconds experiment, instead of reserving testing for special occasions.
Choose Realeyes when you need human-observed validation on high-stakes finished creative, or platform-grade attention measurement across campaigns. Choose PreTestAds when iteration speed is the constraint — daily creative decisions, AI-generated batches, lean budgets — and the question is "which of these twelve cuts deserves to exist?" Screen with the model; validate the winner with humans if the stakes justify it.
Score a cut in minutes, iterate, and re-score — up to 8 free credits.
Test Your Ad FreeFor iteration-speed attention screening, yes — no panels, minutes per test, per-credit pricing, up to 8 free credits. Realeyes remains the stronger choice when human-observed validation of finished creative is required.
Realeyes measures real panelists' attention through webcams — observed behavior, panel logistics, per-study economics. PreTestAds predicts engagement with a model trained on fMRI brain data — no recruitment, minutes turnaround, benchmarked against top TikTok ads.
As a screening instrument, yes: the model was trained on real brain responses and benchmarked against real top-performing ads, and the percentile spread between weak and strong creative is large. Treat it as a screen that ranks and diagnoses — validate finalists with humans when stakes demand it.