Brevo

Brevo's editor covers drag-and-drop email design, transactional email via API or SMTP, and basic marketing automation, plus SMS and WhatsApp campaigns from the same dashboard, useful for a business that wants one platform for every channel a customer might see. A simple CRM and meeting scheduler round out the account without extra cost.

Pricing on paid tiers is based on how many emails you send per month rather than how many contacts you store, which sets it apart from most competitors on this list. The free plan allows unlimited contact storage up to 100,000 records but limits sending to 300 emails a day, with Brevo branding on every message and no automation, A/B testing, or landing pages included. Paid plans that remove the daily cap and add automation start under $10 a month. It's a strong pick for a business with a large but infrequently emailed list, less so for one sending daily campaigns to that same list on the free tier.