HyperWrite is an AI writing assistant and personal AI agent built by OthersideAI that helps users plan, draft, and execute work directly across email, documents, and the browser. Originally launched in 2020 as one of the earliest GPT-3 powered writing tools, HyperWrite has evolved by 2026 into a full personal AI platform combining long-form writing, autocomplete, custom AI workflows ('Tools'), and a browser-based agent that can autonomously navigate websites, fill out forms, book travel, order groceries, and complete multi-step tasks on the user's behalf. The product is best known for its Chrome extension, which surfaces context-aware suggestions inside Gmail, Google Docs, LinkedIn, Notion, and virtually any text field on the web, allowing users to rewrite, summarize, translate, brainstorm, or generate replies without ever leaving the page. The Personal Assistant agent uses a fine-tuned action model trained on millions of real browser interactions to understand visual page layouts and perform tasks reliably, while the AI Workflows feature lets teams create reusable, sharable prompts ('Tools') tailored to specific use cases like sales outreach, customer support, recruiting messages, or SOP generation. With more than two million users and growing enterprise adoption among sales, support, and operations teams, HyperWrite positions itself as a lightweight, browser-native alternative to heavier AI suites — focused on getting written work and routine web tasks done faster without forcing users to context-switch into a separate chat window.