Best WriteNow AI for Microsoft Outlook Alternatives ranked by AI · updated Aug 2026

💡 Pick it for the most complete AI drafting and summarization experience inside Microsoft 365.

Microsoft Copilot is a general-purpose AI assistant integrated with Microsoft's web, productivity, and developer ecosystems. It supports conversation, writing, image generation, research,...

💡 Pick it for stronger proofreading, tone detection, and writing help across more than just Outlook.

Grammarly is a digital writing assistant that helps users improve their writing by offering suggestions for grammar, punctuation, style, and tone.

💡 Pick it when your priority is polishing and rephrasing drafts rather than full Outlook automation.

Wordtune is an AI rewriting and writing assistant for refining sentences, changing tone, and improving clarity. It is designed for professionals, students,...

💡 Pick it if you need AI writing plus tracking, reminders, tasks, and other inbox-management features.

Mailbutler is a productivity extension for Apple Mail and Gmail that helps professionals and teams manage emails more efficiently.

💡 Pick it for multilingual writing and broader AI content workflows beyond Outlook email.

TextCortex is an AI writing and knowledge assistant for professionals, marketers, and teams that generates, rewrites, summarizes, and answers questions from business...

💡 Pick it if you want a full high-speed email client rather than only an AI writing add-in for Outlook.

Superhuman is a blazingly fast email experience that allows you to manage your inbox efficiently.