Grammarly Pro vs Free

Free covers basic spelling and grammar, tone detection and 100 monthly AI prompts. Pro adds full-sentence rewrites, tone adjustment and team writing features, with 2,000 AI prompts per member a month. The commitment matters too: the support page checked 6 November 2026 lists US$144 per member for a year, US$60 for three months or US$30 month-to-month. The annual equivalent is not a monthly payment offer.

Start with Free if occasional proofreading is your main job. Shortlist Pro when awkward sentences, inconsistent brand language or repeated customer replies are a daily editing problem. This is a documented feature comparison, not a hands-on review or a measured productivity claim. Our full Grammarly review includes the existing security research and alternatives.

What changes when you move from Free to Pro?

Price and AI-prompt allowances checked on the official plans and support pages on 6 November 2026. USD before applicable tax. The plans extract does not clearly preserve every feature checkmark, so this guide does not infer an enterprise control from an unlabeled table cell. Confirm the exact control you require with the vendor.

A prompt allowance is not a word allowance

The published limit is a number of AI prompts per month. It is not a blanket limit on how many words you can write or a promise that every editing function uses a prompt. In a proposed pilot, identify the editing functions people actually use. Don't divide the allowance by an invented average document size or assume every correction consumes a prompt. If the work is basic proofreading, extra generative capacity may not be the missing feature at all.

Annual, quarterly and monthly billing explained

The attractive US$12 figure is the monthly equivalent of an annual subscription. Grammarly's support page lists US$144 per member for the year. Quarterly is US$60 for three months, equivalent to US$20 per month; monthly is US$30. These are different commitments, not three names for the same month-to-month plan. Confirm the amount due now, applicable tax and the next renewal amount before starting a trial or subscribing.

These totals are simple member counts multiplied by the verified list price, before tax. They are not quotes, special offers or a return-on-investment calculation. Grammarly says added seats are prorated to the remaining days in the subscription period. It also offers regional pricing in EUR, GBP and INR at checkout; we do not convert the USD list price with an assumed exchange rate.

Who should stay Free, and who should consider Pro?

Set up a team workflow, not just more seats

Pick the roles that actually need paid editing. A founder writing every sales proposal may need different features from a colleague who only reads them. Confirm whether an occasional contributor needs a licence, and keep a list of active paid members so departing staff do not remain on the bill. Pro supports up to 149 seats according to Grammarly's cost article, but that capacity does not mean every small business needs a company-wide rollout.

For customer-facing work, define one approved source for claims, offers and policies. Grammarly can improve the wording, but it cannot know whether a discount is authorized or whether a sentence describes the current service. For example, a team creating an offer graphic in Canva Pro should approve the copy before design and publication. The editing tool should not be the final authority on product specifications, legal terms or numerical promises.

Keep important reusable text under review. A support snippet should be clear enough to reuse but specific enough not to promise a refund or deadline that does not apply. If a workflow routes drafts through Zapier, leave an approval step before external sending. For legal documents, use qualified review appropriate to your jurisdiction; LegalZoom's US services are a separate category, not something included with Grammarly Pro.

Privacy, AI detection and professional limits

Grammarly's trust center says it does not sell or monetize user and customer content. It also says users can opt out of allowing content to train models by turning off “Product Improvement and Training” in account settings. Those are different statements: no sale does not automatically mean no processing, no storage or no model improvement. Review current settings and your employer's data policy before using confidential client text.

The trust center describes separate tailored-assistance controls and notes that documents saved in the Grammarly Editor remain until deleted or the account is deleted. Decide where sensitive documents may be stored and whether the organization requires central controls. Our full review records the previously checked security and hosting information; for procurement, request current documentation rather than treating an old certification list as a contract.

AI-text detection and plagiarism checking are review aids, not guarantees about authorship, originality or permission to publish. This guide does not claim a measured detector accuracy, and a flagged passage should not automatically become an accusation. Likewise, a clean result does not grant copyright permission or validate a factual claim. Human review matters most for customer commitments, regulated advice and work where a mistake can affect someone materially.

A practical upgrade checklist

1. Try Free where you write. Use your browser, documents and email workflow, not only the vendor's editor.
2. List the missing capability. Is it rewriting, tone, a shared style guide or more generative prompts? Avoid buying for a vague “better AI” promise.
3. Use approved sample text. Compare suggestions with the original meaning; check numbers, names, caveats and commitments.
4. Review privacy settings. Check model-training and tailored-assistance settings, storage and administrator requirements.
5. Price only required members. Compare annual cash cost with monthly flexibility and review the renewal terms shown in your account.
6. Keep a review owner. Someone should maintain snippets and style rules and approve important external content.

Record the capability Free could not cover and the people who need it. If the pilot finds no material gap, keep Free. If the gap belongs to one role, price those members rather than promise an unsupported company-wide saving. Our future hands-on notes will require actual observations; this feature and billing comparison does not supply them.

Sources checked 6 November 2026

• Grammarly plans — plan positioning, AI prompt allowances and feature descriptions.
• How much does Grammarly Pro cost? — billing amounts, extra seats, 149-seat limit and currencies.
• Grammarly trust center — content use, opt-out controls and storage explanations.

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