Grammarly AI Writing Assistant: Pricing, Limits and Privacy

Choose Grammarly when the main job is reviewing and improving writing inside documents, browsers and supported apps rather than starting every task in a general AI chat. Its writing assistant covers grammar, clarity, tone, rewriting and related checks, while Superhuman Go is a separate optional assistant. The company is now Superhuman Platform Inc., but Grammarly remains the canonical writing product and should not be merged with Go, Mail or Docs. Official writing assistant · Product identity.

Pricing checked September 20, 2026: Free is USD 0 and includes 100 AI prompts per month. The plans page displays Pro at USD 12 per month when billed annually, with a seven-day trial and 2,000 prompts per member per month. The pricing support article separately lists USD 30 monthly, USD 60 quarterly and USD 144 annually; regional checkout prices can differ. Enterprise is contact-sales and adds unlimited prompts per member plus organization controls. Keep the annual effective monthly figure, total annual charge and flexible billing separate. Plans · Pro billing.

Privacy depends on account type and settings. Product Improvement and Training is enabled by default for individual accounts and directly purchased multi-user Pro accounts, with an opt-out. Sales-managed Enterprise, Business, Pro and Education accounts have it disabled by default. A statement that Grammarly either always or never trains on customer content would therefore be misleading. Training control.

Service processing and model training are different questions. Grammarly says prompts and relevant context can be shared with vetted LLM service providers to deliver features, while those providers may not train on the content. Documents created in Grammarly Editor remain stored until the user deletes them or the account or contract ends. Sensitive-field exclusion is best effort, not an absolute guarantee. Privacy FAQ.

Grammarly and Superhuman Go cannot both be the active desktop writing experience in the documented setup. Enabling Go can replace Grammarly's generative interface in supported clients, and availability varies. Teams should decide whether they need focused inline assistance or a broader contextual assistant. Grammarly and Go together.

Independent evidence establishes durable adoption, not guaranteed quality. The Chrome Web Store reports 40 million users, 43.1 thousand ratings and a 4.5 score, while G2 shows more than 13 thousand reviews. Trustpilot is materially lower and includes cancellation, renewal and refund complaints. Use those signals to test suggestion acceptance, retained voice, false corrections and billing clarity. Chrome Web Store · G2 reviews · Trustpilot.

Run a seven-day trial on real emails, long documents, technical terms and non-native English writing. Record accepted and rejected suggestions, meaning changes, editing time, prompt use and retained voice. AI detection, plagiarism checks, rewrites and generated text are decision aids, not authoritative proof. The Gr artwork is an AI Best Tool editorial identifier, not Grammarly's official logo or a product screenshot.