The short answer
Grammarly is an AI writing assistant that corrects grammar, spelling, clarity and tone in the apps where you already write, and rewrites or drafts text when you ask. It is made by Superhuman, the new name the company took in October 2025. The Free plan includes 100 AI prompts a month, Pro includes 2,000 per member and Enterprise is unlimited. Training on your writing is on by default for individual accounts, so switch it off in your privacy settings.
| Made by | Superhuman, the company formerly called Grammarly |
|---|---|
| Free plan | Yes: grammar, spelling, tone detection and 100 AI prompts a month |
| Models | Not published; Grammarly does not name the AI models it uses |
| Best at | Polishing emails, documents and messages inside the apps you already use |
| Shows sources | Only through agents such as Citation Finder, not in everyday corrections |
| Team plans | Pro for teams, Enterprise, and the Superhuman Business suite plan |
| Your data | Training on your writing is on by default for individuals and self-serve teams; off by default for sales-purchased and Education accounts |
What Grammarly is now
Grammarly started as a spelling and grammar checker, and that is still the part most people rely on: underlined mistakes in your email, documents and browser, fixed with one click. What changed is the company around it. In October 2025 Grammarly renamed itself Superhuman and grouped four products into one suite: Grammarly for writing, Coda as a workspace, Superhuman Mail for email and Superhuman Go, an AI assistant that offers help across your apps before you ask.
Grammarly works through browser extensions for Chrome, Safari, Firefox and Edge, desktop apps for Windows and Mac, mobile apps for iPhone, iPad and Android, a Microsoft Office add-in and Google Docs. Superhuman Go runs in the Chrome and Edge extensions and as a desktop app on Mac. Superhuman's Go plans page still lists the Windows desktop app as coming soon, although Grammarly's release notes already include Superhuman Go for Windows updates.
Grammarly does not publish which AI models power its features, so unlike ChatGPT or Claude there is no model name to look for. Judge it by the output.
The plans, in plain English
On Grammarly's plans page there are three tiers:
- Free: grammar and spelling corrections, tone detection (it tells you how you sound but will not adjust it) and 100 AI prompts a month.
- Pro: full-sentence rewrites, tone adjustment, fluent English suggestions, inclusive language, citation consistency, AI-text and plagiarism detection and 2,000 AI prompts per member a month. Teams also get a style guide, a brand tone, snippets and analytics.
- Enterprise: unlimited AI prompts, proactive AI that works in every app and tab, SAML SSO, SCIM, data loss prevention, your own encryption keys and audit logs.
Superhuman also sells the whole suite on its own Go plans page. Its Business plan bundles Grammarly, Docs and Superhuman Mail, adds Superhuman Go connectors for Jira, Linear, Asana, Confluence and Zendesk, and gives more custom agents, which people build without code. Every Go tier includes Superhuman Go; on Free it is limited to basic inline suggestions and limited chat.
Where Grammarly is genuinely strong
Fixing writing where it happens
The real advantage over a chat assistant is that you never copy and paste. You write a client email in Outlook, Grammarly flags a vague sentence and a missing word, and you accept the fix in place. For people who send dozens of messages a day, that adds up to fewer embarrassing mistakes without changing any habit.
Keeping a team on one voice
On Pro, a team can set a style guide and a brand tone, so suggestions push everyone toward the same terms and register. A marketing team that always writes "sign up" instead of "register" gets flagged consistently, which is hard to enforce by memory.
Writing in English as a second language
Fluent English suggestions on Pro rewrite phrases that are grammatically correct but sound unnatural. For non-native speakers writing to clients, this is often the most valuable feature on the plan.
Agents for specific jobs
Grammarly now offers agents including Citation Finder, AI Grader, Reader Reactions, AI Detector, Humanizer and Resume Builder. Through Superhuman Go you also get connector agents for Google Workspace, Microsoft Outlook, Jira and Confluence, and partner agents; Box, Gamma and Wayground were added on 23 February 2026. Since 16 October 2026 you can also attach a file to a Go chat and ask it to summarise the file or answer questions about it.
Where it falls short
- It is not a research or thinking tool. For working through a strategy, analysing a spreadsheet or researching a topic with sources, a general assistant does far more. See Grammarly vs Claude.
- The free AI allowance is small. 100 prompts a month runs out quickly if you ask for rewrites every day.
- Suggestions can flatten your voice. Accepting every clarity suggestion makes writing correct but generic. Treat suggestions as options.
- Training is on by default for individuals. More on that below.
How to get better results from Grammarly
- Name the reader in your prompts. When you ask the AI assistant for a rewrite, say who will read it and how formal it should be, so the result fits the situation rather than a generic standard.
- Write first, polish second. Turn off the urge to fix every underline while drafting. Finish the thought, then do one pass with Grammarly.
- Use prompts for structure, not just style. Ask the AI assistant to reorder an email so the request comes first, or to cut a paragraph to three sentences. That is where your monthly prompts earn their keep.
- Reject suggestions that change meaning. A rewrite that sounds smoother but softens a deadline or a number is worse than the original. Read the change before you accept it.
- On a team, set up the style guide. Ten minutes adding your product names and preferred terms saves hundreds of small corrections later.
Privacy: switch off training on your writing
Grammarly's Product Improvement and Training setting is on by default for Free, Premium and single-user Pro accounts, and for multi-user Pro accounts bought on the website. To switch it off on Free or Premium, go to account.grammarly.com/security/privacy and turn off the Product Improvement and Training toggle. On Pro, the toggle is at account.grammarly.com/admin/data_settings, and on a multi-user Pro account only an admin can change it.
Enterprise accounts, Business and Pro accounts bought through Grammarly's sales team, and all Education accounts have training off by default. People who join a team adopt the admin's setting; if they later leave for an individual account, the team's setting carries over and they can then change the toggle themselves. With the setting off, Grammarly says it may still use non-content data such as writing statistics.
Which plan suits whom
Stay on Free if you mainly want typos and grammar caught and rarely ask for rewrites. Choose Pro if you write to clients all day, write in English as a second language, or need a shared style guide for a small team. Choose Enterprise if you need SSO, data loss prevention and training off by contract. If you mostly want an assistant to think with, pair the free Grammarly plan with a general assistant instead; our Grammarly alternatives guide and Grammarly lesson show how.
Prompts to copy
Put the ask first
Rewrite this email so the request is in the first sentence, the context follows in no more than three sentences, and the deadline is stated clearly. Keep my tone friendly and keep every number exactly as written. [paste email]
You get: An email the reader can act on from the first line
Cut a long message in half
Shorten this message to under 80 words without losing any decision, date or name. Remove filler and repeated points. [paste message]
You get: A tighter message with every fact kept
Make it sound natural in English
I am a non-native English speaker. Rewrite this paragraph so it sounds natural to a British client, keep it professional but warm, and list the three phrases you changed and why. [paste paragraph]
You get: A natural rewrite plus what to learn from it
Say no politely
Turn this draft into a polite reply that declines [request], offers [alternative] instead and keeps the relationship positive. Maximum five sentences. [paste draft]
You get: A firm but friendly decline
Match our brand tone
Rewrite this product update for customers in a confident, plain and friendly tone. Use short sentences, avoid jargon, and keep the product names exactly as written: [product names]. [paste update]
You get: Customer-ready copy that keeps names right
Check before you send
Read this message as the recipient, [role, e.g. a busy finance director]. Tell me in three bullet points what is unclear, what might annoy them and what they will ask next, then suggest one fix for each. [paste message]
You get: A reader's view of your message before it goes out