Is Grammarly safe for business documents? Yes on security, with a catch that depends on your account type: Grammarly states that training on your text is switched on by default for Free, Premium and single-user Pro accounts, and switched off for Business accounts bought through its sales team.
TL;DR: Is Grammarly safe for business documents? Grammarly holds SOC 2 Type 2 and ISO 27001 certifications, encrypts your text and states that it does not sell customer data. The setting that matters is Product Improvement and Training, which is on by default for individual accounts and off by default for Business and Enterprise accounts bought through sales. Documents saved in the Grammarly Editor stay stored until you delete them. Turn the setting off, keep sensitive files out of the Editor, and check the browser extension's reach. DocsAura, an AI document design tool, reads one file at a time and installs nothing in your browser.
Is Grammarly Safe for Business Documents? Three Things Decide It
Grammarly sits in the browser, in Word and in your email, so it sees more of your writing than most tools. For a small business owner, that reach is the reason to check it. Three things decide whether it is safe for your documents: which account type you have, what you save inside the Grammarly Editor, and where you let the extension run.
What Grammarly says about security
Grammarly's security page lists SOC 2 Type 2 (audited by Ernst & Young) and ISO/IEC 27001, 27017, 27018 and 27701. [^1] Data is hosted in Amazon Web Services data centers in the US East region. [^1] Its trust center states that Grammarly does not sell or monetize user and customer content and that only authorized staff who need the data for their work can reach it. [^2] On encryption, an independent review of the company's whitepaper describes TLS 1.2 in transit and AES-256 at rest. [^3]
What Grammarly says about training, by account type
This is the part that changes with how you signed up. Grammarly's support page on Product Improvement and Training (PI&T) lays it out. [^4]
- Free, Premium and single-user Pro: PI&T is on by default. Your content, including text processed by the generative AI features, can be used to train Grammarly's models until you switch it off.
- Teams bought on the website: PI&T can start on, and only the admin can turn it off for the organization.
- Business and Enterprise bought through Grammarly's sales team: PI&T is off by default.
When the setting is off, none of your input is used to train models or improve the product for others. Grammarly may still collect non-content data, such as writing statistics. [^4] Grammarly's own trust FAQ adds that its generative AI runs through Azure OpenAI, that no data is retained by Microsoft, and that Grammarly does not allow third parties to train on customer data. [^5]
To switch it off on a Free or Premium account, open your account's privacy settings and click the Product Improvement and Training toggle. [^4] That takes one minute and settles most of the question.
What Grammarly stores
Grammarly separates two kinds of text. A document you save in the Grammarly Editor stays stored until you delete it or the contract ends. [^3] Text you check without saving it, for example in your browser or in Word, is processed to produce suggestions. Grammarly's business FAQ states that this unsaved text is not stored after processing. [^5] When you delete an Editor document, it leaves production systems immediately and backups clear within 14 days. [^3] So the habit that protects you is simple: check a draft in Word or your browser, and avoid saving client documents inside the Editor.
Where the Risk Sits
Security certifications cover Grammarly's servers. The risk for a small team sits closer to your desk.
The extension reads what you type. The browser extension and the Office add-in can see text on every page where they are switched on. A third-party due diligence report notes that this reach creates a chance of processing sensitive content by accident, and it recalls a 2018 vulnerability in the extension's authentication tokens that Grammarly fixed quickly. [^6] Grammarly lets you turn it off for specific websites and apps, and a green icon shows when it is active. [^3] Switch it off on your online banking, your accounting software and your client portal.
Regulated data needs a contract. Grammarly's acceptable use policy tells customers not to process protected health information unless they hold a Business Associate Agreement, and a BAA is available on the Enterprise plan. [^7] If your documents contain health records, ask for that agreement first.
Your client contract comes first. Some client agreements limit which tools may touch their documents. Can You Use AI on Documents Covered by an NDA? walks through that check.
What We Found Reading Grammarly's Account Terms
We read Grammarly's Product Improvement and Training page, its privacy and security FAQ and its trust center on 4 November 2026, then lined up the answer for each account type on four points.
| Point | Free, Premium, single-user Pro | Team bought on the website | Business or Enterprise bought through sales |
|---|---|---|---|
| Training on your content | On by default, you can switch it off | May start on, admin can switch it off | Off by default |
| Who controls the setting | You | Admin | Contract terms |
| Saved Editor documents | Stored until you delete them | Stored until you delete them | Stored until deleted or contract ends |
| BAA for health data | Enterprise plan only | Enterprise plan only | Enterprise plan only |
Source: Grammarly Support and Trust Center pages cited below. [^3] [^4] [^7]
The pattern repeats across the assistants we checked: the written promise is strong on every plan, and the account type decides whether the default protects you. Free vs Paid AI Tools for Business Documents compares the same split across tools.
Three Steps Before You Run a Client Document Through Grammarly
This check takes about ten minutes.
- Switch off training. On an individual account, open the privacy settings and turn off Product Improvement and Training. On a team account, ask the admin to turn it off for the organization.
- Keep documents out of the Editor. Check a draft in Word or the browser and keep the final file in your own storage. Delete any client document already saved in the Editor.
- Limit the extension. Switch it off on banking, accounting and client-portal pages, and take account numbers, ID numbers and health details out of anything you check. What to Redact Before Uploading a Document to AI gives the checklist.
If you handle client personal data, also read Do You Need a Data Processing Agreement for AI Tools?. Grammarly's Customer Business Agreement incorporates a Data Privacy Addendum for customer personal data. [^8]
How Grammarly Compares With the Other Tools
Grammarly corrects wording inside a document. The AI assistants write and summarize across your files, so their safety checks differ. Read the matching checks for Google Gemini, Claude, Microsoft Copilot and Notion AI. For ChatGPT, see Is ChatGPT Safe for Business Use?.
For an owner who wants cleaner writing, a sensible default is Grammarly with training switched off, the Editor left empty and the extension limited to your email and word processor.
Where DocsAura Fits
Grammarly polishes the words. The design of the page the client opens is a separate job. DocsAura, an AI document design tool, takes a DOCX or PDF you already wrote and proofread, and returns a designed HTML page in about two minutes. It reads one file at a time. There is no browser extension, no connection to your inbox or drive, and nothing running in the background to review. You can click any text to edit it, then export a PDF or share a link.
Try It on One File You Already Have
Pick a document that is finished and proofread, such as a client update, a quote or a report. Drop it into DocsAura, the AI document design tool, and see what comes back in about two minutes. There is nothing to install and nothing to keep running afterwards. If you like the result, use it for the next one. If a section needs a change, click it and edit it.
[^1]: Grammarly, Security at Grammarly, https://www.grammarly.com/security [^2]: Grammarly, The Grammarly User Trust Center, https://www.grammarly.com/trust [^3]: Grammarly, Security Whitepaper, https://www.grammarly.com/media-resources/security-whitepaper [^4]: Grammarly Support, Product Improvement and Training Control, https://support.grammarly.com/hc/en-us/articles/25555503115277-Product-Improvement-and-Training-Control [^5]: Grammarly Business Trust and Security FAQs (PDF hosted by SHI), https://www.content.shi.com/cms-content/accelerator/media/pdfs/grammarly/grammarly-business-trust-faq-112524.pdf [^6]: Cybershore, Grammarly Security and Privacy Due Diligence Report, https://cybershore.co.nz/cybershore-free-vendor-report-grammarly [^7]: Grammarly, How We Protect Your Privacy, https://www.grammarly.com/privacy [^8]: Grammarly, Customer Business Agreement, https://www.grammarly.com/terms/customer-business-agreement-nov-2024
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