AI academic writing assistant · Global (India focus)
Einsia: A focus on India plus PMax took weekly sign-ups up 3.8× in 6 months
3.8×
weekly sign-up growth
The challenge
Still pre-commercialisation, aiming to scale sign-ups at the lowest cost. Week one ran Search across multiple countries in parallel, with per-sign-up cost as high as $19 and a baseline weekly average still at $10.65.
Our approach
Narrowed markets: tested 6 market groups in month one, then concentrated spend on India, the lowest-cost market; PMax carried nearly 90% of budget while Search kept only the two highest-intent terms; creative split by use case — error-fixing, paper figures, end-to-end research — paired with talking-head video; GA4 sign_up held as the single primary conversion.
Results
- Weekly sign-ups rose from 463 to 1,774 over 6 months
- Cost per sign-up fell from $10.65 to $1.36
- Weekly clicks up 3.5×, weekly spend down roughly half
Results are based on Bridge Marketing project records.