Dotdigital

Dotdigital has been building marketing automation since 1999, and that experience shows in how thoroughly it handles cross-channel campaigns. The platform connects email, SMS, web experiences, and social channels under one customer data layer. You can build workflows that respond to customer actions across any channel, then automate the response across others.

It's popular with mid-market retailers, agencies managing multiple client accounts, and brands that need deep customer data integration without moving to an expensive enterprise-only system. The interface works well for teams planning complex, multi-step campaigns that span audiences and channels.