Case Study: Charlie (Charlie Finance) achieves 40,000+ waitlist signups in one month with GrowSurf

How A B2C FinTech Company Supercharged Growth For Their Waitlist Using GrowSurf

Charlie, a B2C fintech based in San Francisco that helps users save on bills, needed a fast way to build a referral-powered waitlist for the launch of Charlie 2.0. With less than one week and limited development resources, Charlie turned to GrowSurf to give subscribers unique referral links and stand up a waitlist quickly.

GrowSurf delivered an embeddable referral form and a Mailchimp integration so Charlie could launch in days, re-engage users by email, and use built‑in anti-fraud protection to block abuse of $1 rewards. The GrowSurf-powered campaign exceeded 40,000+ participants in one month, hit peak weekly shares of 2,200+ and 400+ referrals, and achieved a 16% impressions-to-signups rate while receiving strong, responsive support.

Charlie

Paola Heneine

Marketing Manager