If you're a developer looking to implement a robust transactional email system for your SaaS application, choose Resend. Its developer-first API and strong deliverability options make it a solid choice for projects that require technical implementation and customized email templates using component-based designs like React Email.
On the other hand, if you’re involved in product development and need a versatile collaborative tool for designing UI, opt for tldraw. Its infinite canvas and real-time collaboration features are excellent for teams building interactive applications or prototypes. However, avoid tldraw if you need a fully open-source solution or are simply looking for a straightforward sketchpad, as its commercial use comes with licensing fees and a watermark.