Another contender is WriteMail.ai, which drafts emails on your behalf by analyzing emails in real-time and making suggestions for clarity, tone and structure. It supports multiple languages and offers AI-assisted writing with content suggestions, AI editing for grammar and spelling, and an interface that offers immediate feedback. WriteMail.ai offers a free tier and a Pro plan, so you can save time and improve your email writing abilities.
Last, EzMail.AI is a free Chrome extension that uses Gmail to draft full emails and messages with ChatGPT. It fills in email context automatically and drafts responses, but you can edit the response to add your own voice. The extension works in all languages and is designed to protect privacy, so it's a good option to boost your email productivity.