Intercom

Intercom unifies customer messaging by combining email with in-app chat and help articles on a single platform. You can send targeted email campaigns and follow up with in-app messages, or start a conversation in the app and shift to email as needed. For SaaS companies, this integration is particularly useful during onboarding, when new users benefit from both announcement emails and just-in-time guidance.

The platform works best for products that can embed messaging directly in the app. It's less of a pure email tool and more of a customer engagement layer that happens to include email alongside chat and support.