Reassurance AI offers a personal emotional support AI chatbot named Sai, providing guidance, advice, and a listening ear for users. Additionally, users can maintain a personal journal to log thoughts and concerns for self-reflection. Sai remembers past conversations and allows for customization of responses, including various fonts and text-to-speech options.

The AI tool aims to offer a safe space for venting and receiving emotional support but emphasizes the importance of seeking professional mental healthcare when needed. Interactions with Sai in the personal journal are counted based on user inputs and responses received.