Grammarly vs ProWritingAid
Grammarly is a general writing assistant with a Free, a Pro and a quoted Enterprise plan. ProWritingAid prints monthly, yearly and lifetime prices and adds fiction tools such as chapter critiques. Grammarly suits teams that need administration; ProWritingAid suits a novelist who wants fixed, published prices and may prefer to pay once.
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Choose Grammarly ifyou write for work, need team style guides or single sign-on, and accept that the Pro price is shown without a billing period.
Choose ProWritingAid ifyou write fiction, want published monthly, yearly and lifetime prices in euro, and care more about story feedback than company administration.
Grammarly and ProWritingAid side by side
| Grammarly | ProWritingAid | |
|---|---|---|
| Our AI writing tool rank | #13 of 13 | #1 of 13 |
| Established in | United States | United Kingdom |
| Pricing | Free plan; Pro per month, published; Enterprise quoted | Free plan; monthly, yearly or lifetime, published |
| List price, 19 October 2026 | Free; Pro 12 euro (billing period not stated on the page); Enterprise via sales | Free; Premium 30 euro monthly, 10 euro a month yearly (120), 399 lifetime; Premium Pro 36 monthly, 12 a month yearly (144), 699 lifetime |
| Free tier | Yes | Yes |
| Open source | — | — |
| Self-hostable | — | — |
| Built for | Employees and students who want corrections inside every app they type in | Writers who revise their own drafts and want a lifetime licence option |
| Not for | Teams wanting marketing copy planned and generated at volume | Teams that need first drafts generated at volume |
Both are reviewed in full in our AI writing tool ranking: Grammarly and ProWritingAid.
Where they differ
Grammarly 1 · ProWritingAid 2 · open 2- 01
Published prices
ProWritingAid lists Premium at 30 euro billed monthly or 10 euro a month billed yearly (120 euro), and Premium Pro at 36 or 12 euro a month (144 euro yearly). Grammarly shows Pro at 12 euro without naming the billing period on the page we read, and Enterprise is contact sales. ProWritingAid is easier to budget.
Edge: ProWritingAid
- 02
The free plan
Grammarly Free gives 100 AI prompts a month with spelling, grammar and tone view. ProWritingAid Free allows 10 rephrases, 3 Sparks and 3 Creative Nudges a day, and two runs of each line editing report a day. The first is capped monthly, the second daily. Neither limit is generous; pick by the kind of writing.
Depends on the buyer
- 03
Team and security features
Grammarly Pro includes 2,000 prompts per member a month, 2 user groups, one style guide and one brand tone. SAML single sign-on, SCIM, audit logs and BYOK encryption are Enterprise only. The ProWritingAid pricing page lists no team administration, only comments and sharing on Premium. Grammarly is the one for organisations.
Edge: Grammarly
- 04
Fiction tools
ProWritingAid includes Story Canvas, Chapter Critique (one a day on Premium, 30 on Premium Pro), Sparks, Creative Nudges and a comparison against 90 fiction authors, plus 25 or more writing reports. Grammarly's pricing page lists tone, rewriting, citations and plagiarism and AI text detection, none aimed at manuscripts.
Edge: ProWritingAid
- 05
Paying and leaving
ProWritingAid offers one-time Premium for 399 euro and Premium Pro for 699 euro, with a three-day refund window on yearly and lifetime plans. Yearly plans renew automatically. Grammarly states that Business purchases for 10 or more members on an annual plan can be invoiced. One-off payment against invoicing: these buyers differ.
Depends on the buyer
When neither fits
If your main need is checking grammar across many languages or a lower price, other tools in our AI writing ranking, such as LanguageTool and Wordtune, are worth a look. Both have free tiers listed in our data.
Grammarly or ProWritingAid: questions
4 answersIs ProWritingAid cheaper than Grammarly?
On what the pages show, ProWritingAid Premium is 10 euro a month billed yearly. Grammarly Pro shows 12 euro without a stated billing period, so the comparison is not exact. ProWritingAid also sells a lifetime licence.
Does ProWritingAid have a lifetime licence?
Yes. The pricing page lists Premium at 399 euro and Premium Pro at 699 euro as one-time payments, and says lifetime licences are not charged again.
Does Grammarly have a free plan?
Yes. The Free plan costs 0 euro a month and includes grammar and spelling checks, tone display and 100 AI prompts a month.
Which is better for novels?
ProWritingAid, on features: it lists Story Canvas, Chapter Critique, Sparks and author comparison. Grammarly's page lists none of these.
Sources
Checked 19 October 2026- Grammarly plans: Free, Pro and Enterprise features, prompt allowances, team feature limits, invoicing for 10 or more members.
- Grammarly terms of service: Superhuman Platform Inc., formerly Grammarly, Inc., offices in San Francisco, United States.
- ProWritingAid pricing: plan prices in euro, lifetime prices, daily free limits, fiction tools, refund window, automatic renewal.
- ProWritingAid terms of service: contracting company Orpheus Technology Ltd.
- ProWritingAid privacy policy: data stored and processed in the United Kingdom.