Julian Shapiro Contributor Share on Twitter Julian Shapiro is the founder of BellCurve.com, a growth marketing team that trains startups in advanced growth, helps you hire senior growth marketers and finds you vetted growth agencies. He also writes at Julian.com. More posts by this contributor How to advertise a podcast in 2020 Gauging email success, invite-only app launches and other growth tactics We’ve aggregated many of the world’s best growth marketers into one community.