Writemail.ai is an AI-driven email writing tool that aims to make email writing effortless, eliminate stress, and increase email reply speed by 87%. It offers a free tool extension that can enhance Gmail, Outlook, and Hotmail. The tool allows users to compose new emails or replies with AI-generated text and gives users options to select the tone, mood, content length, language, and emoji use depending on the recipient’s age, cultural background, and the email’s purpose. It also provides tips on email writing etiquette and best practices to ensure the success of the email.