Composer AI vs Ellie

Composer AI is an email drafting tool for Gmail that uses an email thread and the user’s tone to prepare replies. Users connect Gmail, open a message, review and edit the generated draft, then send it. The homepage states that replies are produced in under three seconds. Composer AI is available on the web and as a browser extension, using Google APIs to read Gmail threads during composition. Its Free Beta Tier costs nothing and includes 20 draft compositions per account; users may request a manual limit increase. The privacy policy says thread content and prompts are sent to OpenAI, retained for up to 30 days, and not used for model training. Full conversation and email content is logged to LangSmith for debugging and service improvement, with deletion after 14 days. The service is experimental beta software without service-level agreements or uptime guarantees and advises against highly sensitive communications.

Ellie is an AI email assistant that drafts replies in a user’s writing style using email-thread context. Connected to Gmail or Outlook, it can read incoming messages, categorize them, and save draft replies for review; it does not send messages without the user reviewing and sending them. Ellie learns tone, sign-offs, and writing patterns from sent mail. Users can add website URLs and upload PDF, TXT, DOCX, PPTX, or MD files to provide factual context, while roles set different personas, knowledge bases, and tones for different email types. Ellie supports connected Gmail and Outlook accounts and on-demand drafting in Gmail Web and Outlook Web. It is available on the web, Windows, and through Chrome, Firefox, and Microsoft Edge extensions, as well as a native Outlook desktop add-in. The free plan allows 10 draft replies per day but has no auto-drafts. Paid plans start at $19 a month. A 7-day trial is listed. Ellie says email content is processed by OpenAI and/or Azure OpenAI and is not used to train general models.