ConvertKit is our choice for email marketing. It is relatively affordable, easy to use, and has basic features such as subscriber tracking, manual broadcasts, automated sequences, and automations.
Learn more on their website here: https://convertkit.com/
We enjoy its ease-of-use and find that its basic features more than meet our needs. It’s also easy to automate with Zapier.
It may not meet your needs if you want more robust data on your email subscribers or want to be able to target beyond the basics of people with certain tags or who click certain links.