Spell is an AI platform that offers autonomous AI agents with plugins to help users delegate tasks and transform their daily work. Powered by GPT4, Spell enables users to enhance their productivity and work smarter by utilizing various AI tools. With Spell, users can run multiple GPT tasks simultaneously, eliminating the need to wait for one task to be completed before starting the next. The platform also offers prompt variables, allowing users to input their ideas, data, or topics and generate AI-transformed content. Spell provides a powerful library of curated prompts and templates in categories like marketing, software engineering, content creation, and more. It also offers plugins for specific tasks such as stock research, travel planning, fitness coaching, market research, company research, business planning, essay writing, and cover letter creation. Users can choose from three subscription plans - Personal, Professional, and Expert - each offering different levels of credits, AI agents, plugins, parallel tasks, curated prompts, and priority support. There is a free trial available and the platform supports both monthly and annual billing. Users have praised Spell for its innovative features, ability to run tasks in parallel, and the convenience of its curated prompts and templates.