Grammarly
Catches the mistakes that make a small business look careless
grammarly.com Free tier Checked 29 August 2026
- Price
- From £10 per month
- Trains on your data
- Opt out
- Where data is processed
- Not published
- Data processing agreement
- Not published
- Setup
- Minutes
- Skill needed
- Anyone
What is Grammarly?
Spelling, grammar and tone checking that runs everywhere you type — browser, email, Word — plus rewriting and a plagiarism checker on the paid tier. Unglamorous, and the tool on this list most likely to earn its money on the first quote you send out.
The value is not the grammar. It is that it works in the box you are actually typing in, so it catches the mistake in the email rather than in the document you remembered to check.
Two settings to change immediately. British English, or it will quietly Americanise your spelling in front of customers. And Product Improvement and Training, which is on by default and is what decides whether your drafts feed Grammarly’s models.
What does Grammarly cost in the UK?
| Plan | Price | What you get |
|---|---|---|
| Free | £0/month | Spelling, grammar, tone detection, 100 AI prompts a month. |
| Pro | £10/month | Full rewrites, fluency, plagiarism and AI detection, 2,000 AI prompts per member. |
| Enterprise | Contact sales | BYOK encryption, custom roles, data loss prevention. |
What the free tier actually gets you
Free plan covers spelling, grammar and tone detection plus 100 AI prompts a month. Enough for a sole trader who writes a few emails a day.
Does Grammarly train AI models on your data?
Opt out
Grammarly's trust page states: "You can opt out of allowing Grammarly to use your content to train its models and improve its product for everyone. To do so, turn off Product Improvement and Training in your account settings." So the default is on and you must go and change it. The page does not state a separate policy for Business or Enterprise accounts. Read on 29 August 2026. Worth knowing: an automated read of this page previously returned a paragraph about a different product entirely, which is why this field is only ever set by hand.
The rest of the data position
- Where data is processed: Not published
- Data processing agreement: Not published
What do people use Grammarly for?
- Stop typos reaching customers in quotes and proposals
- Soften an email you wrote while annoyed
- Keep written English consistent across staff who did not all learn it the same way
What does Grammarly connect to?
- Chrome
- Microsoft Word
- Outlook
- Google Docs
- Slack
Where does Grammarly fall short?
- Training on your content is ON by default — you have to find the setting and turn it off
- Suggestions default to American conventions until you set British English
- The tone rewrites flatten a distinctive voice into corporate mush if you accept them all
Who is Grammarly for?
A good fit for
- Sole traders
- Anyone customer-facing
- Teams with mixed writing confidence
Not for
- Writers with a deliberate voice — accept every tone suggestion and you will sound like everyone else
- Anyone unwilling to go and turn off Product Improvement and Training, which is on by default
The Torus verdict on Grammarly
Worth the ten pounds for anyone who sends written work to customers. Turn off Product Improvement and Training on day one, and set British English before it starts changing your spelling.
What are the alternatives to Grammarly?
Others in writing, with what each one is for.
- ChatGPT See vendor pricing The general-purpose assistant most people mean when they say "AI"
- Claude from $20/mo A rival assistant that holds long documents better and hedges less
- Claude for Work Price on application Anthropic's assistant on a business plan, which is not trained on your data
- DeepL See vendor pricing Translation that reads like it was written by a person