Grammarly

What it does

Grammarly is a writing assistant that reviews text as you type. The free tier flags spelling and grammar mistakes and shows how your tone comes across. Paid tiers add full-sentence rewrites, tone adjustment, help writing fluent English, plagiarism and AI-text detection, inclusive-language and citation checks, plus team tools such as style guides, brand tones, snippets and analytics. Every plan includes a monthly quota of generative AI prompts. Grammarly runs as desktop apps for Windows and Mac, browser extensions for Chrome, Safari, Firefox and Edge, add-ons for Microsoft Office and Google Docs, and mobile apps for iPhone, iPad and Android. The Grammarly site now places the product under Superhuman: the footer is signed "Superhuman Platform" and the Enterprise plan is offered through Superhuman Go.

Pricing and plans

The Free plan costs $0 and includes 100 AI prompts per month. Pro costs $12 per member per month when paid annually ($144 a year); Grammarly's support page also lists $30 per member for monthly billing and $60 per member per quarter. Pro raises the AI allowance to 2,000 prompts per member per month and includes a free trial. Enterprise is priced through sales and adds unlimited prompts, SSO, SCIM, data loss prevention, bring-your-own-key encryption and audit logs. In some countries Grammarly sells a regional plan called Grammarly Plus with Pro-level features; its price depends on the region. Grammarly says regional pricing exists in euros, pounds and rupees, so the amount at checkout may differ, and taxes may apply.

Strengths and limits

Grammarly's main advantage is reach: it works directly inside the apps, browsers and office suites listed above, so text does not need to be copied into another tool. The AI prompt quotas cap generative use on Free and Pro, and many governance features (SSO, data loss prevention, confidential mode) are reserved for Enterprise. Because it reads what you type across apps, organisations handling sensitive material should review the Enterprise privacy controls before deployment.