Question: I need a text-to-speech solution that can engage my website visitors and improve user experience, especially for visually impaired users.

ReadSpeaker is a mature option with a lot of features for user engagement and accessibility. With customizable brand voices in 50 languages, simultaneous highlighting, translation and personalization, it's designed to support WCAG accessibility standards and is fully keyboard accessible. It can be integrated with content and learning management systems, so it's good for web reading and document support.

Another option worth considering is ResponsiveVoice. This AI-powered text-to-speech plugin supports more than 51 languages and comes with a Voice Message Editor for creating semi-automated voiceovers. It's accessible and can be integrated with WordPress and e-learning platforms, turning documents into audio content on the fly. With several pricing levels, including a free version, it can be used for a variety of needs.

If you want a more complete audio content management system, BeyondWords has sophisticated voice technology and a range of features including more than 550 AI voices, voice cloning and automatic SSML normalization. It can handle a variety of content formats and has tools for producing, editing, distributing and monetizing audio content to boost engagement and reach.