If you're a developer needing a simple way to handle transactional emails, go with Resend. Its developer-focused API and component-based templates via React Email make it a strong choice for building and integrating email functionalities into your SaaS applications. However, if you lack technical expertise or require advanced campaign management features, look elsewhere; Resend is specifically tailored for developers, not marketers.
On the other hand, if you're a solo creator or a small business wanting to manage your social media presence, Buffer is the way to go. It's user-friendly and allows you to schedule posts across major social networks easily. However, be cautious if you’re expecting in-depth analytics or have many channels to manage; the basic analytics may not satisfy your needs, and per-channel pricing can quickly escalate costs. In that case, you may want to explore alternatives that better fit your requirements.