Grammarly

Grammarly earned its place as the writing tool people install and forget about — in the best sense. It sits quietly in your browser, your desktop apps and your phone keyboard, catching grammar slips, tightening sentences and flagging tone problems across more than half a million apps and sites, a breadth of coverage nothing else matches. The generative AI layer has matured too: rewrites, drafts and replies with 100 free prompts a month, plus plagiarism and AI-content detection for higher-stakes writing. The 2025 rebrand of the parent company to Superhuman changed the frame: Grammarly is now the anchor of a productivity suite with Coda docs, Superhuman Mail and the Go agent that carries context across your apps. For most people the writing product remains the reason to pay. The caveats are real but manageable: $30 monthly pricing pushes you hard toward the annual $12 rate, auto-renewal complaints recur often enough that you should check your billing settings, and non-English support still lags. If you write in English for work or study, Grammarly remains the easiest quality upgrade you can install.