Zencastr needed to scale user acquisition globally, not just more creative, but the full growth stack: paid media execution across every major channel, SEO content to compound organic, and conversion optimization so paid traffic didn't leak.

The Challenge

Zencastr had built a leading browser-based podcasting platform, but faced a familiar scaling problem: they needed to acquire users across multiple international markets simultaneously, with limited internal marketing resources. Traditional creative production, concepting, designing, producing, testing, couldn’t keep pace with the volume of experiments needed to crack new markets. Beyond creative, they needed the full growth engine: paid media execution across every major channel, SEO content to compound organic, and conversion optimization on the pages where paid traffic landed.

The cost per acquisition in untested markets was $34 or higher, and the team was producing only a handful of creative variations per month. At that pace, finding winning creative in even one new market would take quarters, not weeks.

The Approach

We deployed our AI Performance Creative pipeline as the core engine, then wrapped it with the paid media execution, SEO content, and on-site experimentation needed to turn creative into subscribers.

Creative strategy first. Before generating a single asset, we mapped Zencastr’s audience segments across 5 target markets, identified messaging angles (ease of use, audio quality, remote collaboration), and defined visual treatments for each.

AI-powered production at scale. Using our AI creative workflow, we produced 40+ unique creative variations per sprint, each tied to a specific hypothesis about what would resonate in each market. Static ads, video hooks, carousel formats, and landing page variants were all part of the mix.

Rapid testing and iteration. Every variation was deployed into structured A/B tests. Performance data flowed back into the creative strategy within days, not weeks. Winning patterns were identified and amplified; underperformers were retired and replaced with new hypotheses.

Paid media across Meta, Google, and TikTok. We owned full-funnel paid media, budget allocation, structured testing, market-level bidding, and campaign architecture. The AI creative fed this machine; the buying, optimization, and attribution was ours end-to-end.

SEO content built for acquisition. We produced 46 pieces of SEO content, blog posts, editorial articles, and supporting pages targeting acquisition keywords for podcasters, creators, and remote teams. Each piece was mapped to search intent and tied back to Zencastr’s funnel.

Conversion optimization on homepage and pricing. We A/B tested the two highest-leverage pages so paid traffic actually converted. A homepage variant lifted clicks to pricing by 10%. A pricing page test, swapping the secondary headline for “Launch Your Podcast Now: Free, No Credit Card Required”, won 10% more clicks to the subscription page by being shorter and emphasizing the zero-commitment path.

The Results

• $2.59 CAC in a new market that previously cost $34 per acquisition, a 92% reduction
• 25% lift in subscriptions from March to June (5.6K → 7K) vs. the prior period
• 35% subscription lift and 22% CVR lift in the US, the primary campaign market
• 9.77% overall conversion rate lift (1.85% → 2.03%), and a 20% CVR improvement vs. the prior PPC campaign
• 40+ creative assets produced per month, up from fewer than 10, across 5 international markets
• 46 SEO content pieces produced, targeting acquisition intent across creator and remote-collaboration keywords
• Homepage A/B test lifted clicks to pricing by 10%; pricing page test identified a winning variant driving 10% more clicks to subscription
• 3x improvement in click-through rates across top-performing creative variants