Superhuman and Shortwave are two AI-powered email apps that offer intelligent sorting, writing assistance, and insights from inboxes. They share similarities in their features but have different approaches to managing emails. Shortwave is considered easier to use, with a cleaner interface and more effective bundle management, while Superhuman has a more text-heavy design but offers more customizable inbox tabs. Both apps utilize AI-powered functions, including writing assistance and email analysis, but Shortwave's chatbot and personal assistant features are more advanced. Shortwave is also more affordable, offering a free plan and lower paid plans compared to Superhuman's $30/month pricing. Ultimately, Shortwave provides a superior email experience with its smarter AI, ease of use, and cost-effectiveness.