QuillBot

QuillBot is an AI-powered writing assistant that provides a suite of tools including a paraphraser, grammar checker, AI detector, and translator. It aims to help users improve their writing clarity, tone, and overall quality across various platforms. The service offers both free and premium features, catering to a wide range of users from students to professionals.

QuillBot offers a suite of AI writing tools, including a paraphraser, grammar checker, AI detector, and translator, which aligns well with the concept's focus on AI productivity and creativity tools. It features a guided interface with different modes (presets) for paraphrasing, and categorizes its tools. The platform clearly has user authentication and subscription tiers (free and premium). While it doesn't explicitly state multi-model integration, its diverse set of AI tools suggests it leverages different AI capabilities. It also offers search and filter capabilities for its tools, supports multiple languages, has a mobile-responsive design (as evidenced by its Android app), and provides in-app resources/tutorials.