Grammarly

Grammarly Pro at $12 per month annually is worth it for anyone who writes daily and relies on rewrites and tone adjustments. The jump from 100 to 2,000 AI prompts per month makes the free-to-Pro upgrade feel immediately useful, and the plagiarism and AI-text detection tools are genuinely practical for content teams managing quality control. For daily professional writers, the cost comes back in editing time saved within the first week of use.

The free plan is already one of the better free writing tools available and handles grammar and spelling for most casual users without any upgrade. The honest limitation on Pro is scope. Grammarly is an editing and checking tool, not a content generation platform. If your primary need is creating long-form content from scratch, Jasper or Claude Pro are better investments. If you write frequently and want a reliable second pass on everything you produce, Grammarly Pro at $12 per month is hard to argue against.

Grammarly is an AI-powered writing assistant that checks grammar, spelling, punctuation, clarity, tone, and style across every app you write in. It works through browser extensions for Chrome, Firefox, Safari, and Edge, desktop apps for Mac and Windows, and direct integrations with Google Docs, Microsoft Word, and Outlook. The free plan covers real-time grammar, spelling, tone detection, and 100 AI prompts per month, making it functional for everyday writing without any payment.

The Pro plan costs $12 per month billed annually or $30 per month billed monthly. It includes 2,000 AI prompts per month per member, full-sentence rewrites, tone adjustment, plagiarism detection, AI-text detection, and team features including style guides, brand tones, and team analytics. In 2026, Grammarly folded its separate Premium and Business tiers into one unified Pro plan covering both individuals and teams up to 149 members. An Enterprise tier with SSO, SCIM, and compliance controls is available at custom pricing. The parent company renamed itself Superhuman in October 2025 after acquiring the Superhuman email client, but the product remains called Grammarly.

Grammarly holds a 4.7 out of 5 rating on both G2 and Capterra from over 12,000 and 7,000 reviews respectively.