Instantly is a cloud-based email marketing platform that offers features such as email campaigns, automated messages, list management, and analytics. It is focused on providing a simple and user-friendly interface for beginners, with basic integrations like Facebook and Shopify.
In contrast, ConvertKit is a more advanced email marketing platform focused on bloggers, podcasters, and content creators. It has advanced features like automation workflows, customizable opt-in forms, and a visual automation builder. It also provides integrations with more advanced platforms like WordPress and Zapier.
Overall, Instantly is a good choice for beginners or small businesses that need a simple email marketing solution, while ConvertKit is ideal for more advanced users with content-focused businesses that require more advanced automation features.