If you're looking for something other than Warmest, Superhuman is a strong competitor. It uses AI to help you write emails, send follow-up reminders, and split your inbox into more or less important messages. The tool also tracks read status to see when recipients have opened your messages and includes a snippet feature for copying and pasting text. Superhuman works with Gmail and Outlook and promises to free up 4 hours a week for people who use it, letting them respond to messages more quickly.
Another good option is Ellie, an AI email assistant that learns your writing style and can respond to emails based on the context of the email thread. Ellie works in multiple languages and can be used with Gmail and Fastmail as a browser extension. It's good for people who get a lot of email and for people who struggle with grammar and language skills.
If you want a more full-featured email tool, you might like Shortwave. It offers AI writing assistance, smart search and customizable inbox management. Shortwave also offers scheduled send, read status tracking and email grouping, and it's a good option if you want to wrestle your inbox to a more manageable state. It offers several pricing tiers, so you can get what you need, from basic to advanced features.
Last, WriteMail.ai is an AI writing assistant that can help you with clarity, concision and tone. It works in multiple languages and offers real-time suggestions as you write emails. With a few hours of use, it's been helpful for personal and professional email, and its users give it a 4.5-star rating.