If you’re a creator or solo founder focused on nurturing a newsletter audience, Kit (ConvertKit) is your go-to choice. Its tag-based subscriber management and visual automation toolset are tailored for creators looking to build and engage with their audience effectively. However, if your needs center around high-quality email design or you only need to send occasional broadcasts, Kit may not be the best fit due to its functional design approach and rising costs with subscribers.
On the other hand, if you’re a developer needing to handle transactional emails for a SaaS application, Resend is the better option. Its developer-first API and strong deliverability make it ideal for creating component-based email templates using React. However, steer clear if you’re not technically inclined or require advanced campaign management features, as Resend isn't geared towards non-technical users or marketers.