Hiflyer Digital

Isaac Hyman founded HiFlyer Digital after a decade-plus working in-house on the retention side of ecommerce, most recently as a VP of Retention overseeing email, SMS and CRM programs for large multi-brand retailers. His stated track record includes managing subscriber lists exceeding 10 million contacts and generating, by the firm's count, roughly $425M in email and SMS revenue across 100-plus brands over his career. He has also hired, managed and fired a number of retention agencies himself, an experience he cites as the direct impetus for starting HiFlyer: he wanted to build the kind of vendor he had struggled to find as a client.

The agency's thesis follows from that background. Hyman argues that most email and SMS shops operate from courses and templated Klaviyo flows rather than real operator experience at ten-figure retailers, and that the gap between 'sending emails' and running a profitable retention program is where most DTC brands leak revenue. HiFlyer positions itself as ESP-agnostic but Klaviyo-fluent, deliberately refuses to take on paid media or CRO work, and markets a proprietary framework it calls the S.P.A.M. strategy.

Beyond the agency, Hyman is an author, podcast host (Retention Nation) and speaker at industry events including eTail, PostFunnel and the Bluecore Summit. The team has since grown to roughly eight named staff across strategy, creative, campaign management and operations, headquartered in Hackensack, New Jersey, and serves a reported 100-plus retail and DTC clients.