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14 Grammar Checking tools, ranked by readers

Every listed tool supports Grammar Checking. The order comes from 1 reader vote. 9 have a free way in.

Grammar checking tools find writing mistakes and suggest clearer wording. They can catch a missing comma in an email or fix an awkward sentence in an essay. This helps you write with fewer errors and makes your meaning easier to understand.

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Writing Assistance37AI Writing55Content Rewriting21Document Editing16AI Paraphrasing17Plagiarism Checker12

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4 data-backed ways into the list.

Most voted
Grammarly

1 vote clear of second place.

1 vote
Best reviewed
Claude

The deepest review count here, 18 reviews.

5.0(18)
Cheapest paid
QuillBot

Lowest monthly entry price on the list.

$5.83/mo
Most saved
Flot

One of the most-saved tools here.

1 save

Top 5, side by side

The 5 most-voted tools on the facts readers ask about.

Top 5 tools comparison
Fact
#1
Grammarly
#2
Claude
#3
QuillBot
#4
Flot
#5
Wordtune
Reader votes10000
Rating5.0(11)5.0(18)4.0(2)No reviews yetNo reviews yet
Pricing modelFreemiumFreemiumPaidPaidFreemium
Starts at$30 per monthNot listed$5.83/moNot listedNot listed
Free way inYesYesNoNoYes
Saves536111
Added20262025202520252025

What this costs

Here’s how all 14 tools break down by starting price.

Median entry price $14/moCheapest paid $5.83/moFree plan available 9 of 14
BoostedSponsored, does not affect rank

Your tool, in front of 14 competitors

Paid placements appear above the ranking, labelled honestly.

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All 14 tools

Ranked by readers.

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ToolPricingVoteSave

Showing all 14 tools, ranked by 1 reader vote. Ties fall back to reviews and saves.

1
Grammarly
Verified
5.0(11)added 2026
Freemium

Paid from $30 per month

Save
5
2
Claude
VerifiedMust try
5.0(18)added 2025
Freemium
Save
36
3
QuillBot
Cheapest
4.0(2)added 2025
Paid

From $5.83/mo

Save
1
4
Flot
No reviews yetadded 2025
Paid
Save
1
5
Wordtune
No reviews yetadded 2025
Freemium
Save
1
6
ZeroGPT
No reviews yetadded 2025
Freemium

Custom pricing

Save
1
7
GPTinf
No reviews yetadded 2026
Paid
Save
0
9
Kerlig
No reviews yetadded 2025
Paid
Save
0
10
ONLYOFFICE
No reviews yetadded 2026
Freemium

Paid from $20 per month

Save
0
12
Revise
No reviews yetadded 2026
Freemium

Paid from $8 per month

13
Rytr
No reviews yetadded 2025
Freemium

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Community Discussion

Which tool do you use for Grammar Checking, and why?

+20 points a post
3 comments

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  1. 5
    Lisa JRising Star

    I think Grammarly is a great tool for beginners. It helps catch typos and even suggests better ways to phrase your sentences. I still use it regularly, even for simple emails and documents.

    1. 1
      Naomi BayRising Star

      I feel the same. I've been using Grammarly since college and still rely on it at work. It makes me worry a lot less about typos and grammar mistakes. Plus, it's really easy to use.

3 decisions

How to choose Grammar Checking tools

Your choice depends on what you are writing and what you want to do after checking it. A short email, a school paper, and a shared work document can each call for a different kind of help.

  1. For everyday writing

    A quick check can help with emails, posts, and documents you work on throughout the day. Broader drafting needs may also make AI Writing a natural next step.

    • Grammarly is a practical pick when you write across services such as Gmail, Google Docs, Microsoft Word, Slack, and Notion.

    • ZeroGPT suits you when grammar checking needs to sit alongside translation, summarizing, or email help.

    • Kerlig fits writing that moves between services such as Notion, Slack, Gemini, and OpenAI.

  2. For longer drafts

    Essays, books, and other long pieces often need more than a quick error check. Writing Assistance can help with the wider process, while AI Paraphrasing fits passages that need fresh wording.

    • Hemingway Editor is useful when you want to check grammar while also working on readability, proofreading, and tone.

    • ProWritingAid is geared toward longer writing, including books, outlines, rewriting, and document editing.

    • Wordtune works well when rewriting and summarizing are part of polishing your draft.

  3. For rewriting and shared documents

    Team documents may need comments, revisions, approvals, or shared editing as well as cleaner language. Document Editing is a natural fit when the file itself needs broader work.

    • Revise makes sense when people need to review, rewrite, analyze, and collaborate on the same document.

    • ONLYOFFICE fits teams that need document editing, sharing, and collaboration in one place.

    • Zoho Writer suits documents that move through collaboration, proofing, sharing, and approval steps.

4 questions

Common questions

Can I use a grammar checker for free?

Yes. Grammarly, Wordtune, ZeroGPT, ProWritingAid, Revise, and Rytr have free options.

Which tool received the most reader votes?

Grammarly received the most votes, with 1 vote out of 1 total.

Which tools help with plagiarism or originality checks?

Rytr is used for plagiarism checking, while GPTinf is used for content originality checks.

Which tools are suited to collaborative documents?

Revise, ONLYOFFICE, and Zoho Writer are used for document collaboration. Revise also supports real-time collaboration.