Case Study: Nécessaire achieves +61% Paid Media revenue growth with Fospha

Nécessaire’s Prime Day Success with Halo

Nécessaire, a premium personal care and beauty brand, was struggling to understand what was truly driving growth across its DTC site, Amazon, and Sephora as its omnichannel footprint expanded. Traditional platform reporting and click-based attribution could not capture halo effects from channels like TikTok and Meta, making it difficult to measure cross-channel impact or confidently optimize for new customer acquisition. To solve this, Nécessaire used Fospha’s Halo and Unified ROAS measurement.

With Fospha, Nécessaire built a weekly optimization rhythm centered on Unified ROAS and % new conversions, enabling smarter channel allocation, pre-peak planning, and stronger investment in upper-funnel channels like TikTok. The approach paid off over BFCM 2025, driving +61% YoY growth in Paid Media revenue, a +25% uplift in TikTok Unified ROAS, and a +58% uplift in Amazon Sponsored Products Unified ROAS. Fospha also helped Nécessaire prove the value of its cross-channel strategy and turn measurement into a core operating system for growth.

Nécessaire

Calvin Lammers

Senior Vice President of Digital & Media