If you want a tool to build interactive web pages that respond to voice prompts, AI Dev Codes could be a good option. It uses OpenAI's ChatGPT model to generate pages based on prompts you type in and offers an optional voice interface with natural-sounding text-to-speech. The tool is flexible enough to be used for mock-ups, utility pages, illustrated writing and finished sites, and it offers free hosting of user paths and custom subdomains.
Another good option is ChatBotKit, which lets you build AI chatbots that can converse naturally with people on multiple interfaces. Although it's geared more toward building conversational AI than interactive web pages, it supports voice prompts and can be integrated with popular chat apps like Slack and Discord. ChatBotKit supports large language models like GPT-4 and Claude 3, so it's a powerful option for building sophisticated AI interfaces.
If you're not a programmer, Chattie is a no-code interface that lets you embed ChatGPT in a website. You can train chatbots with a variety of data sources, and you can customize how they look with a built-in theme editor with full CSS support. Chattie also offers features like automated prompt generation and statistical analysis, so it's good for maximizing user engagement on your website.