Speech highlight is an excellent tool for implementing text-to-speech functionality with sentence highlighting. It seamlessly integrates audio files, text-to-speech APIs, and the web speech synthesis API, making it a versatile choice for developers. The highlighting feature enhances user experience by clearly indicating the spoken words and sentences, adding a visual layer to the audio output. Moreover, the support provided is amazing (I really liked), ensuring any issues or queries are promptly addressed fast, making it a reliable option for your projects.