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Copyleaks alternatives: 5 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll AI content detectors

Top picks

  • GPTZero logo

    Best overall

    GPTZero

    Free plan + paid

  • Grammarly logo

    Best free option

    Grammarly

    Starting price: $12 per member/month billed annually ($30 monthly), Pro

Common reasons people leave Copyleaks: credit-based pricing can add up for long documents, and like all AI detectors, results are probabilistic and can misfire. We ranked 5 alternatives by how directly each one replaces Copyleaks, then by reviews, real visits and how recently each app's facts were checked against its own website. GPTZero currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1GPTZero logoGPTZeroFree plan + paid—NoWeb, Browser extension5 of 568.8
2Grammarly logoGrammarlyFree plan + paid$12 per member/month billed annually ($30 monthly), ProNoWeb, Windows, macOS +35 of 566.2
3Originality.ai logoOriginality.aiFree plan + paid$12.95/month billed annually (Pro); $14.95 monthlyNoWeb, Browser extension6 of 664.8
4QuillBot logoQuillBotFree plan + paid—NoWeb, Browser extension, iOS +10 of 052.3
5Scribbr logoScribbrFree plan + paid$19.95 per document (up to 7,499 words)NoWeb3 of 350.3
  1. GPTZero logo

    1. GPTZeroTop pick

    Best for: Teachers and schools that want an AI check built into Google Docs, Classroom and Canvas

    Free plan + paidWeb, Browser extension

    68.8

    score / 100

    Why switch from Copyleaks

    A detector built for teachers, with sentence-level highlighting and a generous free tier.

    Pros

    • Short texts can be checked without signing up
    • Writing Replay shows how a document was actually typed
    • Integrations with Google Docs, Classroom, Canvas and Zapier
    • Full support for five major European languages

    Cons

    • Detection scores are estimates and can mislabel human writing
    • Longer scans and extra tools sit behind an account or paid plan
    • Plan prices on the pricing page only load with JavaScript
    Visit GPTZero Compare with CopyleaksDetails and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is GPTZero a good Copyleaks alternative?

    Verified facts

    5 of 5 verified
    Founded
    January 2023
    Checked Nov 8, 2026gptzero.me(opens source in a new tab)
    Languages
    English, German, Portuguese, French, Spanish
    Checked Nov 8, 2026gptzero.me(opens source in a new tab)
    Free scans
    No account needed under 10,000 characters
    Checked Nov 8, 2026gptzero.me(opens source in a new tab)
    Browser extension
    Chrome
    Checked Nov 8, 2026gptzero.me(opens source in a new tab)
    API
    Yes
    Checked Nov 8, 2026gptzero.me(opens source in a new tab)
  2. Grammarly logo

    2. Grammarly

    Best for: English writers who want corrections and AI help everywhere they type, without changing apps

    Free plan + paidWeb, Windows, macOS, iOS, Android, Browser extension

    66.2

    score / 100

    Why switch from Copyleaks

    Bundles a plagiarism and AI detector with writing help, useful if you already pay for Grammarly.

    Pros

    • Works across browsers, desktop apps and phone keyboards
    • Free plan is genuinely useful for spelling and grammar
    • Team style guides and brand tones on business plans

    Cons

    • Text is processed in the cloud, which rules it out for some work
    • Best features need Pro, and monthly billing is expensive
    • Mostly English; weak for other languages
    Visit Grammarly Details and reviews
    How this score is calculated
    Editorial fit ×0.341
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Grammarly a good Copyleaks alternative?

    Verified facts

    5 of 5 verified
    Free plan
    Yes, $0 a month with 100 AI prompts
    Checked Nov 8, 2026grammarly.com(opens source in a new tab)
    Starting price
    $12 per member/month billed annually ($30 monthly), Pro
    Checked Nov 8, 2026grammarly.com(opens source in a new tab)
    Free AI prompts
    100 per month
    Checked Nov 8, 2026grammarly.com(opens source in a new tab)
    Users
    Over 40 million people
    Checked Nov 8, 2026grammarly.com(opens source in a new tab)
    Free trial
    Yes, on Pro
    Checked Nov 8, 2026grammarly.com(opens source in a new tab)
  3. Originality.ai logo

    3. Originality.ai

    Best for: Publishers and SEO agencies checking freelance content for AI writing and plagiarism

    Free plan + paidWeb, Browser extension

    64.8

    score / 100

    Why switch from Copyleaks

    Aimed at publishers and SEO teams, with AI, plagiarism and fact checks in a pay-as-you-go model.

    Pros

    • AI detection, plagiarism, readability and fact checks in one scan
    • Credit system makes cost per word easy to predict
    • Extensions for Chrome, Firefox and Google Docs

    Cons

    • Free allowance is a one-time batch rather than a monthly refill
    • API access is limited to the expensive Enterprise plan
    • Like all detectors, results are probabilities that can be wrong
    Visit Originality.ai Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Originality.ai a good Copyleaks alternative?

    Verified facts

    6 of 6 verified
    Free plan
    Yes, 10K words one time
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
    Starting price
    $12.95/month billed annually (Pro); $14.95 monthly
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
    Pro allowance
    200K words per month
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
    API
    Enterprise plan
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
    Browser extensions
    Chrome, Firefox, Google Docs
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
    Enterprise plan
    $136.58/month billed annually; $179 monthly
    Checked Nov 8, 2026originality.ai(opens source in a new tab)
  4. QuillBot logo

    4. QuillBot

    Best for: Students and non-native writers who mainly want to rephrase and summarise text

    Free plan + paidWeb, Browser extension, iOS, Android

    52.3

    score / 100

    Why switch from Copyleaks

    Offers a free AI detector alongside paraphrasing and grammar tools for students.

    Pros

    • Many paraphrasing modes with adjustable strength
    • Summariser, citations and grammar checks in one place
    • Usable free tier for occasional rewording

    Cons

    • Free plan limits text length and modes
    • Heavy paraphrasing can make writing sound generic
    • Grammar checking is less thorough than dedicated checkers
    Visit QuillBot Details and reviews
    How this score is calculated
    Editorial fit ×0.338
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.1515
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is QuillBot a good Copyleaks alternative?

    Verified facts

    0 of 0 verified

    No sourced facts yet.

  5. Scribbr logo

    5. Scribbr

    Best for: Students checking a thesis or essay for plagiarism, citations and errors before submission

    Free plan + paidWeb

    50.3

    score / 100

    Why switch from Copyleaks

    Pay per document instead of subscribing, with a student-focused plagiarism report and free AI check.

    Pros

    • Pay once per document; no subscription needed
    • Plagiarism report includes self-plagiarism checks
    • Free citation generator for many academic styles
    • Human proofreading available for important papers

    Cons

    • Premium plagiarism checks cost more per paper than some subscriptions
    • Web only, with no desktop or mobile app
    • Focused on academic writing; little help for business copy
    Visit Scribbr Details and reviews
    How this score is calculated
    Editorial fit ×0.346
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Scribbr a good Copyleaks alternative?

    Verified facts

    3 of 3 verified
    Premium check price
    $19.95 per document (up to 7,499 words)
    Checked Nov 8, 2026scribbr.com(opens source in a new tab)
    Billing
    Per check, no subscription
    Checked Nov 8, 2026scribbr.com(opens source in a new tab)
    Self-plagiarism check
    Yes
    Checked Nov 8, 2026scribbr.com(opens source in a new tab)

The best Copyleaks alternative for…

The highest-ranked app in this list for each need.

GPTZero logo

Best Copyleaks alternative for most people

GPTZero

A detector built for teachers, with sentence-level highlighting and a generous free tier.

Grammarly logo

Best Copyleaks alternative for a free plan you can upgrade

Grammarly

Bundles a plagiarism and AI detector with writing help, useful if you already pay for Grammarly.

Grammarly logo

Best Copyleaks alternative for Mac

Grammarly

Bundles a plagiarism and AI detector with writing help, useful if you already pay for Grammarly.

Grammarly logo

Best Copyleaks alternative for Windows

Grammarly

Bundles a plagiarism and AI detector with writing help, useful if you already pay for Grammarly.

QuillBot logo

Best Copyleaks alternative for iPhone and Android

QuillBot

Offers a free AI detector alongside paraphrasing and grammar tools for students.

Originality.ai logo

Best Copyleaks alternative for working in the browser

Originality.ai

Aimed at publishers and SEO teams, with AI, plagiarism and fact checks in a pay-as-you-go model.

Copyleaks alternatives: common questions

What is the best alternative to Copyleaks?

GPTZero ranks first right now. A detector built for teachers, with sentence-level highlighting and a generous free tier. Grammarly and Originality.ai follow it in our ranking.

Copyleaks vs GPTZero: what's the difference?

Both Copyleaks and GPTZero are free with paid plans. Both run on Web and Browser extension.

Is Copyleaks free?

Copyleaks is free with paid plans.

How much do Copyleaks alternatives cost?

Verified prices for the top-ranked Copyleaks alternatives: Grammarly, $12 per member/month billed annually ($30 monthly), Pro; Originality.ai, $12.95/month billed annually (Pro); $14.95 monthly; Scribbr, $19.95 per document (up to 7,499 words). Each price was checked on the app's own site; see each card below for the date and source.

Is there a free alternative to Copyleaks?

Yes. GPTZero (free plan + paid), Grammarly (free plan + paid), Originality.ai (free plan + paid) and QuillBot (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Copyleaks?

None of the 5 alternatives in this list is open source.

Why do people switch from Copyleaks?

The complaints we hear most: credit-based pricing can add up for long documents; like all AI detectors, results are probabilistic and can misfire; main website blocks automated access, so checks happen through the app or API.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Copyleaks, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.