The best 3 AI Writing Assistants to use in 2025

Letterly is an AI-powered mobile application that converts spoken words into well-structured, polished text. Unlike basic voice-to-text tools that only transcribe what you say, Letterly uses advanced artificial intelligence to understand, organize, and improve your speech automatically. The app offers over 25 different rewrite options, allowing you to transform your voice into various formats like formal emails, social media posts, structured notes, or casual messages.

Claude is an advanced AI assistant developed by Anthropic using a unique approach called Constitutional AI. This technology trains the AI to be safe, ethical, and aligned with human values while maintaining powerful capabilities.

ChatGPT is an advanced AI chatbot developed by OpenAI that uses large language models to have natural conversations with people. Think of it as a super-smart digital assistant that can understand and respond to almost any question or request you have.