For solo creators and founders focused on building their email list and engaging their audience, Kit (ConvertKit) is the better choice. Its tag-based subscriber system and strong visual automation builder cater to those looking to create a flexible and effective email marketing strategy. However, if you’re someone who values advanced visual design in your emails or only needs to send occasional broadcasts, you might find Kit's functionality lacking.
On the other hand, if you run a media or content-based business and are interested in growing your newsletter audience through built-in referral and monetization features, beehiiv is the way to go. Its polished editor and strong analytics are designed for scaling newsletters, but keep in mind that the monetization tools become effective only at scale. If you're aiming to send product lifecycle emails or require simple automation, beehiiv may not meet your needs.