Grammarly Alternatives With a One-Time Payment (or Free)

If you want grammar help without a recurring bill, the options are narrower than many “alternatives” lists suggest. Grammarly Pro is a subscription: its support center lists $30 per member per month, $60 per member for three months, or $144 per member per year, and says Grammarly does not offer gift, lifetime or one-time plans. This page lists only tools whose pricing model we could confirm on the vendor's own website. Tools we could not verify are left out, not ranked lower.

Verified one-time and free options at a glance

Is there a Grammarly alternative you can buy once?

Yes. Of the writing checkers we verified, ProWritingAid is the one that sells a lifetime license. Its pricing page lists Premium (lifetime) at $399 and Premium Pro (lifetime) at $699, each as a one-time payment, next to monthly and yearly subscriptions. If you write long documents and plan to use a checker for years, comparing that lifetime price against several years of subscription fees is worth doing.

PromGee is also a one-time purchase, at $25 USD for a lifetime license, but it is a different kind of tool. It does not check your documents as you write. It is a Windows 10 and 11 app for practicing grammar through category quizzes, with an AI explanation of why each answer is right or wrong in 40+ languages. It needs an internet connection, has no offline mode, and the license does not include an unlimited AI quota. See the pricing page for details.

What are the free alternatives to Grammarly?

The simplest free option may be Grammarly's own free plan, which includes spelling and grammar checks, tone detection and 100 AI prompts per month. LanguageTool Basic is free with a 2,000-character limit per text field. Scribens states that it is free and allows 8,000 characters per day. Google Docs underlines spelling mistakes in red and grammar suggestions in blue when suggestions are turned on.

PromGee's free English grammar checker, sentence corrector, casual-to-formal converter and slang-to-formal converter also work in the browser. They explain changes in English, and the text you enter is sent to DeepSeek for processing, so avoid pasting confidential text.

Do you need a checker or grammar practice?

A checker fixes the text in front of you. Practice changes what you write next time. If you are a fluent writer who wants a safety net, a checker such as Grammarly, ProWritingAid or LanguageTool is the right category. If you are learning English and keep repeating the same mistakes with articles, tenses or prepositions, practice with explanations may help more. Many learners use one of each.

Which tools were left out, and why?

We only list a pricing model when the vendor's official page confirmed it on the date checked. We did not include tools whose official pricing pages did not state a one-time or free model clearly, or could not be loaded when we checked. If you represent a tool with a verifiable one-time price, you can contact us with the official source.

Who should choose which?

• ProWritingAid Lifetime: long-form writers who want a full-featured checker without ongoing payments.
• Grammarly Free, LanguageTool Basic or Scribens: occasional writers who need basic checks at no cost and can work within the limits.
• Google Docs: people who already write in Docs and need simple spelling and grammar suggestions.
• PromGee: English learners on Windows who want to understand grammar rules through practice and prefer a one-time $25 USD license.

For head-to-head details, read PromGee vs Grammarly.