Grammarly

Grammarly is a writing assistant that checks spelling, grammar, punctuation, clarity and tone, and can rewrite or generate text with AI. It runs in the browser, as a desktop app, in Microsoft Office and mobile keyboards, so the same suggestions follow you across almost any text field.

The product changed significantly in late 2025. On November 5, 2025 the company that made Grammarly rebranded itself to Superhuman, bringing Grammarly (writing), Coda (documents and workspace) and Superhuman Mail together under one name. Grammarly is now positioned as an AI-native writing and agent platform rather than a standalone grammar checker.

Alongside the rebrand, the company launched Superhuman Go, a proactive AI assistant that can act across more than 100 connected apps, and opened a closed developer beta of the Superhuman Agents SDK. The plan lineup was also consolidated: the former standalone Business tier was folded into Pro.

Key capabilities include real-time grammar and style corrections, tone detection, full-sentence rewrites, plagiarism checking, and prompt-driven AI generation measured in monthly AI prompts. It supports mainly US, UK, Canadian and Australian English.

Pricing is freemium. The Free plan costs $0 and includes 100 AI prompts per month plus core corrections. Pro is around $12 per member per month billed annually (roughly $30 month-to-month) with 2,000 AI prompts per month and a 7-day trial. Enterprise is custom-priced with admin and security controls.

The main limitations: it is English-centric, the monthly AI prompt caps can be reached quickly by heavy users, some rewrite suggestions still need human judgment, and the browser extension can feel intrusive in certain editors. It fits students, professionals, non-native English writers and teams who want consistent, on-the-fly writing help across their tools.