SendGrid is a full-service email delivery and marketing platform that helps businesses securely send transactional and marketing emails. It provides an easy-to-use interface, API and SMTP integrations, and advanced analytics tools to track and optimize performance. On the other hand, SalesHandy is more focused on sales-related email campaigns. It helps users to design, manage, and track email campaigns that have been sent to prospects and customers. It helps users to automate their sales outreach and simplify the process of engaging potential customers. SalesHandy also provides A/B testing capabilities, email tracking, and recipient scoring to get real insights on the performance of their campaigns. Both SendGrid and SalesHandy are great email tools, but each has its own unique capabilities that make it more suitable for different purposes.