The best alternatives to Hub Keyboard from Microsoft are Slash Keyboard, SwiftKey for iOS, and Hebbia. If these 3 options don't work for you, we've listed a few more alternatives below.
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Hebbia is a Chrome extension that *understands* your questions and highlights all relevant info in a webpage. ⠀ Find exactly what you need with just 1 question, powered by cutting-edge AI. ⠀ 👉 Try it on the Chrome webstore! http://producthunt.hebbia.ai
Lightkey is an AI-powered writing assistant for Windows, offering real-time text predictions, spelling & grammar corrections while typing in MS Office and any Chrome or Edge web application, supporting 85 languages.