Podcast audiences may be watching more shows on YouTube, but audio podcast advertising continues to deliver stronger performance for marketers, according to a new study from Oxford Road and Podscribe. The report finds that audio podcast ads convert up to 25% better than identical campaigns running on YouTube.
The whitepaper, titled “Re-Thinking YouTube,” analyzed more than 1,000 advertising campaigns across 100 brands, comparing traditional podcast downloads with YouTube views. Using two independent datasets—promo code redemptions and post-purchase survey responses—the researchers measured how effectively each platform drove listener action.
The findings show a clear advantage for audio. As YouTube’s share of impressions increased, 78% of brands saw response rates decline. On average, YouTube impressions were 18% less efficient at generating survey responses and 25% less effective at driving promo code conversions than audio podcast downloads.
The report attributes much of the gap to listener behavior. Audio podcast audiences tend to be intentional, loyal listeners who consume full episodes and develop trust with hosts over time. They are also accustomed to responding directly to host-read ads and using promo codes to support the shows they follow. YouTube audiences, by contrast, are more likely to discover podcast content through algorithmic recommendations, often in the form of clips rather than full episodes, leading to lower engagement and fewer direct actions.
Measurement differences also play a role. Podcast downloads are typically counted once per user within a 24-hour window, while YouTube can register multiple views from the same user, inflating impression totals without a corresponding increase in engagement. The study also notes that YouTube’s broader international reach can dilute effectiveness for advertisers focused on specific regional markets.
Rather than discouraging YouTube use altogether, the researchers recommend that advertisers plan and measure audio and video podcast inventory separately. Their guidance includes using unique tracking codes for each platform, adjusting YouTube CPMs to reflect lower conversion efficiency, and leveraging YouTube’s strengths for visual storytelling, product demonstrations, and upper-funnel awareness instead of assuming parity with audio.
Oxford Road Executive Vice President of Strategy and Insights Giles Martin said the analysis represents the first serious attempt to quantify the relative value of pure audio podcasts versus YouTube simulcasts. He noted that while simulcasts offer scale and visibility, performance marketers should approach them cautiously, testing and challenging results as they would with any emerging channel.
The study reinforces a message increasingly heard in audio advertising circles: reach alone does not equal results, and audio podcast ads remain a powerful driver of listener trust and action.