My stack
    Comparison

    Grammarly vs ProWritingAid

    Grammarly and ProWritingAid: two different approaches for similar needs.

    Grammarly logoGrammarlyAI-assisted grammar, style and tone checker with sentence rewriting, plagiarism detection, and a free plan capped at 100 AI prompts a month.$12/mo★ 3.0ProWritingAid logoProWritingAidWriting assistant to improve style, grammar and clarity.Free★ 4.2

    Our verdict

    Grammarly logo

    Choose Grammarly

    You write in English regularly for clients and want AI-assisted rewriting plus plagiarism checks in one subscription.

    Watch out

    • AI prompt usage is capped even on the paid Pro plan (2,000/member/month).
    • Advanced security and compliance features require a custom Enterprise quote.
    ProWritingAid logo

    Choose ProWritingAid

    You write long-form English and want to polish style. You're a fiction author who values detailed reports.

    Watch out

    • English-focused.
    • Lots of reports: a bit intimidating at first.

    Compare by use case

    Grammarly logoGrammarlyProWritingAid logoProWritingAid
    Primary use caseYou write in English regularly for clients and want AI-assisted rewriting plus plagiarism checks in one subscription.You write long-form English and want to polish style.
    Real costPaid plan starts around $12/month.Free plan possible depending on volume.
    Avoid ifYou need unlimited AI rewriting volume or SSO/compliance features without an Enterprise quote.You mostly write in a language other than English.

    Pricing

    Entry prices of the paid plans. Check taxes, seat counts and limits with the vendor. Checked on 2026-09-25.

    Should you switch?

    Stay if

    You use ProWritingAid and you write long-form English and want to polish style.

    Switch if

    You write in English regularly for clients and want AI-assisted rewriting plus plagiarism checks in one subscription: Grammarly is built for that.

    Common questions

    Grammarly or ProWritingAid: which is cheaper?

    Grammarly starts at $12/mo; ProWritingAid has a free plan.

    Grammarly or ProWritingAid: which should you choose?

    Choose Grammarly if you write in English regularly for clients and want AI-assisted rewriting plus plagiarism checks in one subscription. Choose ProWritingAid if you write long-form English and want to polish style.

    Sources, terms and methodology

    Recommendations are editorial judgements based on documented plans. No hands-on ToolTrim benchmark is presented here.

    Read the ToolTrim methodology →