AWeber

AWeber is one of the more established platforms, noted for emphasis on design and ease of use.
Its Smart Designer generates branded templates automatically from your website URL, and it integrates with a wide range of third-party apps (750+). Offers 600+ free templates, drag-and-drop editor, and basic automation (autoresponders, drip campaigns). Pricing starts at $12.50/month for unlimited emails and 500 contacts with free tier support. Its automation features are more basic compared to newer competitors.