Case Studies

TGP, the largest prospecting agency in Latin America, was bleeding ops hours stitching together domains, Google Workspace, and email creation across five separate vendors. On InboxKit, that whole chain collapsed into a few clicks — dropping client onboarding from hours to minutes without touching their 15.2% reply rate.

In late 2025, a Google mailbox crackdown ran through the cold email world and hit agencies hardest. Rather than chase the next cheap workaround, Jayson DeMers of OutreachBloom moved to InboxKit mid-crisis — and has run OutreachBloom's cold email infrastructure on it ever since, at an 11.5% reply rate and a 0.6% bounce rate.

A multi-client GTM agency transformed manual mailbox setup into a fully automated, self-service operation. In six months on InboxKit, Anevo Marketing went from zero to 4,361 mailboxes under their own control and cut client setup time from one to two weeks down to one to two hours.

Managing 100+ client campaigns at scale meant abandoning manual infrastructure work. InboxKit's automation became the only way forward — automated DNS (zero manual hours), domain isolation, zero suspensions, and a 17% average reply rate.