Omnisend

Omnisend is useful for small and medium businesses as its free plan only includes email. Omnisend, in a core sense, is an eCommerce marketing platform, integrating all your communication platforms in one place. But altogether, Omnisend is a powerful email marketing campaign tool which allows you to automate your email delivery using behavioral triggers and easily time your communications based on your customers’ convenience & provide insights into your email campaign performance with its inbuilt analytics.

The free features include 2,000 emails per day with up to 15,000 emails per month. Paid features are priced at approx $16 per month.