Scalebay

Scalebay is a mobile growth agency founded in 2022 by Jean-Christophe Stienlet and Lorenzo Paccagnini, a French-Italian duo with offices in Paris and Madrid. It runs paid user acquisition and App Store Optimisation together, setting spend against what each user is worth over time, for subscription, gaming, fintech and health apps.

The agency starts from the economics of the app: target CAC, ROAS and payback are agreed first, then measurement and creative testing come before volume is scaled. iOS and Android are modeled separately and blended by user split, and attribution relies on a mobile measurement partner setup plus incrementality testing. Its user acquisition work follows six steps: audit and strategy, channel and budget planning, creative and messaging, launch and media buying, test and optimise, and measure and scale. Early signals on cost per install usually show within one to two weeks, with stable CPA and ROAS taking roughly four to eight weeks. For a few apps, Scalebay also invests alongside the client through equity or hybrid structures.

• App Launch Strategy: positioning and go-to-market planning for new apps
• User Acquisition: paid campaigns on Meta, Google, TikTok, Apple Search Ads and selected programmatic networks
• ASO: store listing and custom product page optimisation
• Creative Strategy: hooks, static, video and UGC concepts with a testing plan
• Retention and CRM: keeping acquired users active
• Data and KPI Analysis: reporting on ROAS, CPA, LTV and retention
• LTV and Monetization: includes a free LTV calculator

Client logos shown include Le Point, Free2move, Shotgun, Euronews, Le Parisien, heavn, Youpray, Poulpeo and Equito. Case studies report that Euronews reached 1.89x cohort ROAS at 24 months with payback cut to nine months, Free2move lowered CPA by 14 percent on brand and 16 percent on competitor keywords through custom product pages, and Equito scaled Meta ads to 3.6x ROAS. Le Point grew subscriptions 96 percent while cutting CPA 71 percent, and heavn more than doubled ROAS.

Scalebay reports having managed more than 1 million euros in quarterly ad spend across over 70 apps since 2020. The team works in English, Spanish and French, and lists its values as transparency, flexibility, localization and a performance focus.