Brevo

Brevo charges based on how many emails you send rather than how many contacts you have, making the free tier genuinely usable for coaches starting out. You get both email and SMS tools in one account, plus a basic CRM to track client interactions. Marketing automation lets you build workflows without learning code.

The free plan is perfect for testing your email strategy before investing money. As you grow and need higher volume or advanced features, upgrading remains affordable compared to per-subscriber models, which can get expensive quickly.