You came from an AI answer. These are today's GPTZero alternative prices and free limits. See the table →Get price alerts
AI tools, scored for your job
Get paid to train AI
Updated 13 Nov 2026 · prices read on vendor pages

14 best GPTZero alternatives in 2027

Mehmet ElmicenniReviewed by Mehmet Elmicenni, founder of Zekai•Prices checked •How we check

The short answer

The best GPTZero alternatives in 2027 are Originality.ai (best overall, $12.95/mo billed yearly), Scribbr (best free plan: Unlimited free AI checks) and SlopTotal (best open source, MIT). GPTZero itself starts at $12.99/mo billed yearly. Zekai checked these prices on vendor pages on 13 Nov 2026; 11 more are compared below, including 5 with a free plan and 4 open source.

Open the Zekai Cost Finder Get price alerts
Best overallSee in table →
Originality.ai logo

Originality.ai

$12.95/mo billed yearly · free plan

7.7
Best free planSee in table →
Scribbr logo

Scribbr

Free plan; paid price not published · free plan

7.5
Best open sourceSee in table →
SlopTotal logo

SlopTotal

Free to self-host · MIT

6.9
14alternatives compared
7with a free plan
5open source
$8/mo billed yearlycheapest paid · Isgen
$12.99/mo billed yearlyGPTZero starts at
01 · Zekai Price Ledger

Which GPTZero alternatives are worth it in 2027?

The AI detectors most often weighed against GPTZero are Originality.ai for bulk publisher checks, Copyleaks for credit-based plagiarism and image checks, Winston AI for text plus deepfake detection, ZeroGPT for a no-card checker, and Turnitin for institutions. Isgen is the cheapest paid plan listed, at $8 a month billed yearly.

ToolTypeStarting priceFree plan limitBest forCost for your teamChecked
GPTZero logo
GPTZeroThe tool you are replacing
 You are here
$12.99/mo billed yearlyPremium, billed yearly or $23.99 billed monthly; Professional $24.99 yearly or $45.99 monthly
 10,000 words a month, 1 advanced scan Teachers wanting sentence highlights and model detection — 12 Nov 2026 Pricing ↗
Copyleaks logo
Copyleaks Zekai score 6.6
 Free plan + paid
$13.99/mo billed yearlyPersonal, billed yearly or $16.99 billed monthly
 25,000 characters per free scan; no free plan on pricing page Plagiarism plus AI checks bought by credit — 12 Nov 2026 Pricing ↗
Originality.ai logo
Originality.ai Zekai score 7.7Best overall
 Free plan + paid
$12.95/mo billed yearlyPro, billed yearly or $14.95 billed monthly
 10K words (100 credits) one time; comparison table says 60 credits renewing daily Bulk content checks for publishers and agencies — 12 Nov 2026 Pricing ↗
Winston AI logo
Winston AI Zekai score 7.7
 Free plan + paid
$10/mo billed yearlyEssential, billed yearly or $18 billed monthly (list; WINSTON50 code shows 50% off)
 2,000 credits, 14-day trial Detecting AI text, images and deepfakes together — 12 Nov 2026 Pricing ↗
ZeroGPT logo
ZeroGPT Zekai score 4.6
 Free plan + paid
$8.99/mo billed yearlyPro, billed yearly or $14.99 billed monthly
 15,000 characters per AI detection Quick free AI text checks with batch upload — 12 Nov 2026 Pricing ↗
Quetext logo
Quetext Zekai score 7.6
 Free plan + paid
$14.99/moEssential, from (monthly); yearly price not listed on the page
 AI detector up to 1,000 words; plagiarism checker up to 1,000 words Plagiarism checker and AI detector bundle — 12 Nov 2026 Pricing ↗
Isgen Zekai score 7.3Cheapest paid
$8/mo billed yearlyAcademic, billed yearly or $14 billed monthly
 No free plan Low-cost academic detector with plagiarism check — 12 Nov 2026 Pricing ↗
Sapling logo
Sapling Zekai score 7.5
 Free plan + paid
$25/moPro, monthly; annual price not read (page shows Save 52% toggle)
 2,000 characters per check, 5 files per batch AI detector inside a writing-suggestions tool — 12 Nov 2026 Pricing ↗
Scribbr logo
Scribbr Zekai score 7.5Best free plan
 Free
Free plan; paid price not publishedPremium AI Detector: no price shown on page
 Unlimited free AI checks, no sign-up; word cap not stated Students wanting a no-sign-up free check $0 12 Nov 2026 Pricing ↗
Turnitin Zekai score 8.6
Not checkedInstitutional quote only, no public price
 No free plan Institution-wide similarity and AI writing checks — 12 Nov 2026 Pricing ↗
SlopTotal logo
SlopTotal Zekai score 6.9Best open source
 Open source
Free (self-hosted)
 No limit, self-hosted (MIT) Self-hosted multi-engine AI text detector $0 13 Nov 2026 Code ↗
Binoculars logo
Binoculars Zekai score 3.5
 Open source
Free (self-hosted)
 No limit, self-hosted (BSD-3-Clause) Research-grade zero-shot detection you run yourself $0 13 Nov 2026 Code ↗
Fast-DetectGPT logo
Fast-DetectGPT Zekai score 5.1
 Open source
Free (self-hosted)
 No limit, self-hosted (MIT) Zero-shot detection from an ICLR 2024 paper $0 13 Nov 2026 Code ↗
Open Detector logo
Open Detector Zekai score 6.4
 Open source
Free (self-hosted)
 No limit, self-hosted (MIT) Academic-paper AI detection with a small model $0 13 Nov 2026 Code ↗
SynthID Text logo
SynthID Text Zekai score 6.3
 Open source
Free (self-hosted)
 No limit, self-hosted (Apache-2.0) Watermark detection for text you generate $0 13 Nov 2026 Code ↗

Every price was read on the vendor's own pricing page on the date shown. The Cost Finder assumes one entry plan per person, so it multiplies by your team size; yearly prices are shown per month, and team or business plans can cost more per seat. "Not checked" means we could not confirm a public price.

Price alert

Know first when GPTZero or an alternative changes price

One email when a price or free plan on this page changes, plus The AI Briefing. Unsubscribe any time.

Alternatives Spotlight

Your tool here

One labelled card beside this table, outside the ranking.

Advertise here
For vendors

Is one of these tools yours?

Claim your listing to correct prices and free-plan limits.

Claim your tool
02 · Free plan

Is there a free version of GPTZero?

Yes. GPTZero's Free plan costs $0 and allows 10,000 words a month, a basic AI scan, 1 free advanced scan and 5 free AI highlights in the Chrome extension. The homepage scanner shows a 10,000-character cap per scan, and longer scans need a free account.

Source: GPTZero pricing page, read 12 Nov 2026.

Free$0

10,000 words a month, 1 advanced scan

Paid from$12.99/mo billed yearly

Premium, billed yearly or $23.99 billed monthly; Professional $24.99 yearly or $45.99 monthly

03 · Free alternatives

What are the best free GPTZero alternatives?

Scribbr advertises unlimited free AI checks with no sign-up, though it states no word cap. ZeroGPT allows 15,000 characters per detection, Sapling 2,000 characters per check, Quetext 1,000 words, Winston AI 2,000 credits over 14 days, and Originality.ai a one-time 10K words. GPTZero itself gives 10,000 words a month.

Copyleaks logo

Copyleaks

Free plan + paid
25,000 characters per free scan; no free plan on pricing page
Paid from $13.99/mo billed yearly
vs GPTZero →Zekai review
Originality.ai logo

Originality.ai

Best overallFree plan + paid
10K words (100 credits) one time; comparison table says 60 credits renewing daily
Paid from $12.95/mo billed yearly
vs GPTZero →Zekai review
Winston AI logo

Winston AI

Free plan + paid
2,000 credits, 14-day trial
Paid from $10/mo billed yearly
vs GPTZero →Zekai review
ZeroGPT logo

ZeroGPT

Free plan + paid
15,000 characters per AI detection
Paid from $8.99/mo billed yearly
vs GPTZero →Zekai review
Quetext logo

Quetext

Free plan + paid
AI detector up to 1,000 words; plagiarism checker up to 1,000 words
Paid from $14.99/mo
vs GPTZero →Zekai review
Sapling logo

Sapling

Free plan + paid
2,000 characters per check, 5 files per batch
Paid from $25/mo
vs GPTZero →Zekai review
Scribbr logo

Scribbr

Best free planFree
Unlimited free AI checks, no sign-up; word cap not stated
vs GPTZero →Zekai review
04 · Open source

What are the best open-source GPTZero alternatives?

Open-source AI text detectors are few and mostly research code. SlopTotal (MIT) runs 23 detection engines in Docker on a CPU with about 8.3 GB of RAM. Fast-DetectGPT (MIT), Binoculars (BSD-3-Clause) and Open Detector (MIT) are Python models you run yourself, and SynthID Text (Apache-2.0) only detects its own watermark.

SlopTotal logo

SlopTotal

MIT★ 114 GitHub stars · 13 Nov 2026
To self-host: Run docker run -p 8000:8000 ghcr.io/pablocaeg/sloptotal or the docker compose file; it detects your CPU, RAM and GPU at startup and needs about 8.3 GB of RAM for models.
Commercial use
Yes (MIT).
Runs on
Runs on CPU; loaded models need about 8.3 GB of RAM; GPU optional.
Setup
Moderate · One docker run command; models download on first start.
Last commit
3 Nov 2026
Last release 3 Nov 2026
Zekai open-source pageSource code ↗Managed hosting slot
Binoculars logo

Binoculars

BSD-3-Clause★ 435 GitHub stars · 13 Nov 2026
To self-host: The repo is Python (pip install -e .) and scores text with two Falcon-7B models, so both 7B models must be downloaded; no hosted page, so you supply the hardware.
Commercial use
Yes for the code (BSD-3-Clause); check the licence of the Falcon models you download.
Runs on
Python 3.9; two 7B models, so a GPU or large-memory machine.
Setup
Hard · Clone the repo, pip install, then download two 7B models.
Last commit
14 May 2024
Zekai open-source pageSource code ↗Managed hosting slot
Fast-DetectGPT logo

Fast-DetectGPT

MIT★ 440 GitHub stars · 13 Nov 2026
To self-host: Python scripts: run scripts/local_infer.py for an interactive demo with gpt-neo-2.7B, or pass gpt-j-6B as the sampling model; an online demo and API are at fastdetect.net.
Commercial use
Yes (MIT).
Runs on
Authors ran it on an 80 GB A100; the local demo defaults to gpt-neo-2.7B.
Setup
Hard · Python 3.8 and PyTorch 1.10 environment plus model downloads.
Last commit
7 Feb 2026
Zekai open-source pageSource code ↗Managed hosting slot
Open Detector logo

Open Detector

MIT★ 254 GitHub stars · 13 Nov 2026
To self-host: Install transformers and torch, then load followsci/bert-ai-text-detector from Hugging Face in a short Python script; text over 512 tokens is truncated, and it targets academic writing.
Commercial use
Yes (MIT); the Hugging Face model card also states MIT.
Runs on
Python with PyTorch and Transformers; BERT-base model, 512-token input.
Setup
Moderate · pip install transformers torch, then a short Python script.
Last commit
12 Nov 2026
Zekai open-source pageSource code ↗Managed hosting slot
SynthID Text logo

SynthID Text

Apache-2.0★ 1.3k GitHub stars · 13 Nov 2026
To self-host: Install from PyPI or clone the repo and open the Colab or local Jupyter notebook; it watermarks Gemma 3 270M IT or GPT-2 text, then detects it.
Commercial use
Yes (Apache-2.0), but the repo calls itself a reference implementation, not for production.
Runs on
Any GPU such as a T4 for Gemma 3 270M; GPT-2 runs on CPU.
Setup
Moderate · Python virtual environment and a Jupyter notebook from the repo.
Last commit
26 Oct 2026
Zekai open-source pageSource code ↗Managed hosting slot
05 · Side by side

How does GPTZero compare with each alternative?

Against GPTZero, Originality.ai adds scan history and add-on seats, Copyleaks sells by credit with image detection, Winston AI adds deepfake and image detection, ZeroGPT costs less, Isgen costs less again with 350,000 words, Sapling embeds detection in a writing assistant, and Turnitin is quote-only for institutions.

01
Copyleaks logo

GPTZero vs Copyleaks

Free plan + paid$13.99/mo billed yearly · checked 12 Nov 20266.6
The differenceSells by credit: Personal gives 100 credits a month, one credit covering up to 250 words or 1 image; Pro adds 25 seats and website scanning by sitemap, which GPTZero's page does not list.
Switch to Copyleaks ifyou scan by document count, need image detection or whole-site sitemap scans, and prefer credits over a monthly word quota
Stay with GPTZero ifyou want a free recurring word quota and a single flat plan with batch upload up to 250 files
Pros
  • Combines AI detection and traditional plagiarism checking in one tool.
  • Provides specific model detection (e.g., GPT-3.5, GPT-4).
Cons
  • AI detection is probabilistic and can produce false positives on human writing.
  • False positives are more common for people writing in a second language.

Pros and cons from the Zekai review of Copyleaks · Verdict: Dual-purpose checker

Visit CopyleaksRead the Zekai reviewPrice alert
02
Originality.ai logo

GPTZero vs Originality.ai

Best overallFree plan + paid$12.95/mo billed yearly · checked 12 Nov 20267.7
The differencePro gives 200K words (2K credits) a month with 30-day scan history, bulk scan, PDF download and paid extra seats at $8.62 a month; GPTZero Premium gives 300,000 words but no extra team seats.
Switch to Originality.ai ifyou vet freelancer or agency articles in bulk and want scan history, shareable reports and add-on seats
Stay with GPTZero ifyou check single essays and want a free quota that resets monthly instead of a one-time allowance
Pros
  • Third-party studies validate its high accuracy
  • All-in-one suite: AI, plagiarism, fact-check, readability
Cons
  • Risk of false positives requires human review
  • The comprehensive feature set may be overkill for simple checks

Pros and cons from the Zekai review of Originality.ai · Verdict: Comprehensive Content Integrity Suite

Visit Originality.aiRead the Zekai reviewPrice alert
03
Winston AI logo

GPTZero vs Winston AI

Free plan + paid$10/mo billed yearly · checked 12 Nov 20267.7
The differenceCredit-based: Essential gives 100,000 credits a month and covers AI image and deepfake detection, OCR for scans and handwriting, plagiarism checks and shareable PDF reports; Advanced adds 5 team members.
Switch to Winston AI ifyou also screen images, deepfakes or scanned handwriting and want a 5-member team plan
Stay with GPTZero ifyou want a free plan that does not expire after 14 days
Pros
  • Combines AI detection with plagiarism checking in one tool.
  • OCR function is a unique feature for scanning printed or handwritten work.
Cons
  • Detection is probabilistic and should not be treated as definitive proof.
  • Documented risk of false positives, which can unfairly affect non-native English speakers.

Pros and cons from the Zekai review of Winston AI · Verdict: A solid, indicative tool.

Visit Winston AIRead the Zekai reviewPrice alert
04
ZeroGPT logo

GPTZero vs ZeroGPT

Free plan + paid$8.99/mo billed yearly · checked 12 Nov 20264.6
The differenceFree forever at $0 with 15,000 characters per detection; Pro lifts it to 100,000 characters and 50 batch files and adds an AI video detector, summarizer and a WhatsApp or Telegram bot.
Switch to ZeroGPT ifyou want a cheaper paid tier and extras such as a video detector and WhatsApp access
Stay with GPTZero ifyou rely on sentence-level highlighting and per-model detection in one report
Pros
  • Generous free tier for checking short texts.
  • Simple copy-and-paste interface is very easy to use.
Cons
  • Results are probabilistic and not guaranteed to be accurate.
  • Can produce false positives, incorrectly flagging human writing as AI-generated.

Pros and cons from the Zekai review of ZeroGPT · Verdict: A fast, but fallible, guide.

Visit ZeroGPTRead the Zekai reviewPrice alert
05
Quetext logo

GPTZero vs Quetext

Free plan + paid$14.99/mo · checked 12 Nov 20267.6
The differenceEssential bundles a plagiarism checker and AI detector on 100k words a month, plus a humanizer, summarizer, API access and 20-file bulk upload; the free AI detector stops at 1,000 words.
Switch to Quetext ifyou want plagiarism and AI checks in one allowance and API access at a lower entry price
Stay with GPTZero ifyou check longer texts, since Quetext's free detector stops at 1,000 words
Pros
  • Combines plagiarism and AI detection in one interface.
  • Clear visual feedback with color-coded highlighting.
Cons
  • AI detection is probabilistic and can produce false positives on genuine human writing.
  • Detection models may penalize people writing in a second language.

Pros and cons from the Zekai review of Quetext · Verdict: A dual-purpose checker.

Visit QuetextRead the Zekai reviewPrice alert
06

GPTZero vs Isgen

Cheapest paid$8/mo billed yearly · checked 12 Nov 20267.3
The differenceAcademic plan is $8 a month billed yearly ($14 monthly) for 350,000 detection words a month, phrase-level analysis, a plagiarism checker, 60,000 characters per submission and 15 days of history.
Switch to Isgen ifyou want a lower price than GPTZero Premium with phrase-level analysis and plagiarism checks
Stay with GPTZero ifyou need LMS integration with Canvas or Google Classroom and a free tier with a recurring quota
Pros
  • Extremely easy to use: just copy and paste
  • Provides results almost instantly
Cons
  • Detection is probabilistic and can be inaccurate.
  • Risk of false positives, which can unfairly flag human writing, especially from non-native speakers.

Pros and cons from the Zekai review of Isgen · Verdict: A simple first-pass check.

Visit IsgenRead the Zekai reviewPrice alert
07
Sapling logo

GPTZero vs Sapling

Free plan + paid$25/mo · checked 12 Nov 20267.5
The differenceFree detector checks stop at 2,000 characters; Pro raises that to 100,000 characters and 10 files per batch and adds writing suggestions plus a usage-billed API ($5 minimum).
Switch to Sapling ifyou want AI detection beside a grammar and rewrite assistant or a pay-as-you-go detection API
Stay with GPTZero ifyou scan full essays and want 10,000 words a month free instead of a 2,000-character cap
Pros
  • Free plan available for web-based use
  • Simple copy-and-paste interface requires no setup
Cons
  • Results are probabilistic and can be inaccurate; not definitive proof.
  • Risk of false positives, flagging genuine human writing as AI-generated.

Pros and cons from the Zekai review of Sapling · Verdict: A starting point, not proof.

Visit SaplingRead the Zekai reviewPrice alert
08
Scribbr logo

GPTZero vs Scribbr

Best free planFreeFree plan; paid price not published7.5
The differenceAdvertises unlimited free AI checks with no sign-up and a separate Premium AI Detector; the page states no word cap and no published Premium price.
Switch to Scribbr ifyou want unlimited quick checks without an account and do not need reports or an API
Stay with GPTZero ifyou need a stated word quota, Chrome extension and LMS integrations behind a login
Pros
  • Simple copy-and-paste interface is easy to use.
Cons
  • Detection is probabilistic and not 100% accurate; false positives are possible.
  • Can incorrectly flag human writing, especially from non-native English speakers.

Pros and cons from the Zekai review of Scribbr · Verdict: A cautious first opinion.

Visit ScribbrRead the Zekai reviewPrice alert
09

GPTZero vs Turnitin

Not checked8.6
The differenceSold to institutions through sales with LMS integration; its AI writing detection is described as available with Originality, and no price or free tier is published.
Switch to Turnitin ifyour school or university buys centrally and needs LMS-integrated similarity plus AI reports
Stay with GPTZero ifyou are an individual or small team who needs a published price you can start on today
Cons
  • AI detection is probabilistic and can generate false positives on human writing.
  • The risk of false positives is higher for students writing in a second language.

Pros and cons from the Zekai review of Turnitin · Verdict: Institutional integrity tool.

Visit TurnitinRead the Zekai reviewPrice alert
10
SlopTotal logo

GPTZero vs SlopTotal

Best open sourceOpen sourceFree (self-hosted)6.9
The differenceRuns 23 detection engines, including Binoculars and Fast-DetectGPT, on your own CPU and returns one calibrated score with per-engine votes, file and URL scanning, and a JSON API.
Switch to SlopTotal ifyou want to see each detector engine's vote instead of a single number
Stay with GPTZero ifyou cannot spare about 8 GB of RAM for the detector models
Visit SlopTotalRead the Zekai reviewPrice alert
11
Binoculars logo

GPTZero vs Binoculars

Open sourceFree (self-hosted)3.5
The differenceZero-shot detector needing no training data; it scores text with two Falcon-7B models locally and returns a score, without sentence highlighting or a web dashboard.
Switch to Binoculars ifyou want to run detection locally on your own text and keep documents off a vendor server
Stay with GPTZero ifyou want a web page with highlighted sentences and batch upload ready today
Visit BinocularsRead the Zekai reviewPrice alert
12
Fast-DetectGPT logo

GPTZero vs Fast-DetectGPT

Open sourceFree (self-hosted)5.1
The differenceICLR 2024 zero-shot method using conditional probability curvature; the README reports 0.9887 AUROC on five-model generations and ships a local script, with no dashboard or upload.
Switch to Fast-DetectGPT ifyou need to score text on your own machine with a method you can inspect
Stay with GPTZero ifyou need sentence highlighting and batch upload rather than a command-line score
Visit Fast-DetectGPTRead the Zekai reviewPrice alert
13
Open Detector logo

GPTZero vs Open Detector

Open sourceFree (self-hosted)6.4
The differenceBERT-base classifier trained for academic papers; the README claims 99.57% accuracy on its own dataset and says it is stylometric only. It is a model and script, not a web app.
Switch to Open Detector ifyou want a small classifier you can load in a few lines of Python
Stay with GPTZero ifyou want sentence-level highlighting and downloadable reports from the tool itself
Visit Open DetectorRead the Zekai reviewPrice alert
14
SynthID Text logo

GPTZero vs SynthID Text

Open sourceFree (self-hosted)6.3
The differenceGoogle DeepMind reference code that detects only text carrying its SynthID watermark; the frequentist detector gives a binomial p-value for a key, so it cannot flag unwatermarked ChatGPT or Claude output.
Switch to SynthID Text ifyou want to study watermark detection with Google's reference code and a p-value
Stay with GPTZero ifyou want a production service; the repo calls itself a reference implementation only
Visit SynthID TextRead the Zekai reviewPrice alert
06 · What changed

Why do people leave GPTZero?

  • Premium costs $23.99 a month billed monthly versus $12.99 a month billed annually, and Professional is $45.99 monthly versus $24.99 annually; the page advertises a 45% annual saving. (source)

  • The Free plan is capped at 10,000 words a month with 1 advanced scan; Premium raises that to 300,000 words a month and 50,000 characters per scan, and plagiarism checking and page-by-page scanning sit only in higher tiers. (source)

  • GPTZero published a model update, GPTZero 4o, on its news page, describing improved reliability for mixed and modified AI text. (source)

08 · FAQ

Questions people ask about GPTZero alternatives

What is the best alternative to GPTZero in 2027?

Originality.ai is the best overall GPTZero alternative on this page ($12.95/mo billed yearly). For no cost, Scribbr has a free plan (Unlimited free AI checks, no sign-up; word cap not stated). To self-host, SlopTotal is open source (MIT).

Is there a free version of GPTZero?

Yes. GPTZero has a free plan: 10,000 words a month, 1 advanced scan. Paid plans start at $12.99/mo billed yearly, checked on 12 Nov 2026.

Is there a 100% free alternative to GPTZero?

Yes. SlopTotal, Binoculars, Fast-DetectGPT, Open Detector, SynthID Text are open source and free to self-host. Copyleaks, Originality.ai, Winston AI, ZeroGPT, Quetext, Sapling, Scribbr have a free plan with limits, shown in the table.

What is cheaper than GPTZero?

Isgen starts at $8/mo billed yearly, against $12.99/mo billed yearly for GPTZero, as listed on each vendor's pricing page on 12 Nov 2026.

How much do GPTZero alternatives cost for a team of 5?

If each of 5 people buys the entry paid plan, at the prices Zekai checked on 13 Nov 2026, the monthly cost is Isgen $40/mo, ZeroGPT $44.95/mo, Winston AI $50/mo, against GPTZero $64.95/mo for GPTZero. Team and business plans can cost more per seat. The Zekai Cost Finder on this page recalculates for any team size.

Which is better, Originality.ai or GPTZero?

Pro gives 200K words (2K credits) a month with 30-day scan history, bulk scan, PDF download and paid extra seats at $8.62 a month; GPTZero Premium gives 300,000 words but no extra team seats. Choose Originality.ai if you vet freelancer or agency articles in bulk and want scan history, shareable reports and add-on seats. Stay with GPTZero if you check single essays and want a free quota that resets monthly instead of a one-time allowance.

Why are people leaving GPTZero?

The documented reasons are: Premium costs $23.99 a month billed monthly versus $12.99 a month billed annually, and Professional is $45.99 monthly versus $24.99 annually; the page advertises a 45% annual saving (12 Nov 2026); The Free plan is capped at 10,000 words a month with 1 advanced scan; Premium raises that to 300,000 words a month and 50,000 characters per scan, and plagiarism checking and page-by-page scanning sit only in higher tiers (12 Nov 2026). Each is sourced in the section above.

What is better than GPTZero?

It depends on the job: Originality.ai for bulk publisher checks, Winston AI for images and deepfakes, Copyleaks for credit-based plagiarism checks, Turnitin for institutions.

09 · Method

How did Zekai check this page?

Zekai independently reviews AI tools. For this page we read each vendor's own pricing and product pages and recorded the starting price, the free-plan limit and the date of the check. Only tools that do the same job as GPTZero are listed, and sponsors never change the order or the scores.

Mehmet Elmicenni, founder of Zekai
Mehmet Elmicenni

Founder of Zekai. Reviews the alternatives pages and the price checks behind them.

About the founder · How Zekai scores tools

JSON copyMarkdown copy
1 · Same job onlyEvery alternative does the same task as GPTZero; tools for other jobs are left out.
2 · Vendor pages onlyPrices and free limits come from each vendor's own pricing page, never from blogs.
Zekai score0–10, from four published weights: ease 25%, output quality 30%, value 20%, time saved 25%. How we score
3 · Re-checkedA price older than 35 days is re-read or the page falls back to an older version.
Change log

  • Page rebuilt on v6; all prices re-read on vendor pages.

  • Open-source options expanded; each now shows licence, commercial use, hardware and setup.

Get paid to train AI →

See Zekai first in Google