Free text-to-speech services may seem like an attractive option for businesses looking to add audio to their website or app. However, relying on these services can have significant drawbacks. Free text-to-speech services often lack the natural intonation and pronunciation of human speech, leading to a robotic sound that can be off-putting to users. Additionally, these services may not have the same level of privacy and security as paid services, potentially exposing sensitive information to third parties. It is best for businesses to invest in quality text-to-speech services to provide a better user experience and protect their sensitive data.