TextSight vs Originality, GPTZero, Copyleaks and Winston AI

Key findings (May 2026)

TextSight bundles a detector and a humanizer in one workflow. Most major tools on this comparison ship either detection (Originality, GPTZero, Copyleaks, Winston) or rewriting (Undetectable) — not both in the same scan.
Self-reported accuracy is a wash. All five tools claim 98–99.98%. The differentiator isn't detection — it's the workflow after the verdict.
Cheapest entry tier: TextSight Starter at $7.49/month annual billing. Cheapest popular tier per scan: GPTZero Premium at ~$10.40/month with $0.017/scan.
Most expensive per scan: Copyleaks Personal at $0.28/scan (only ~25K words/month for $13.99). Followed by Undetectable.ai's 10K plan at $0.25/scan.
Free tier winner for pure detection volume: GPTZero (10,000 words/month free). For detection + humanizer combined in one free tier: TextSight (3 free scans/day, no signup needed).

The Finding

Detector. Humanizer. Or both.

After comparing five tools side-by-side, the AI content market splits into three categories. TextSight sits in the third — bundling detection and humanization into the same workflow.

🔍

Detection Only

They tell you it's AI. Then they stop. You still have AI text on your screen.

Originality.ai
GPTZero
Copyleaks
Winston AI

✨

Humanizer Only

They rewrite your text — but never tell you what was wrong. You're guessing.

Undetectable.ai

🎯

Detector + Humanizer

Catch every AI flag. Fix it in one click. No tab-switching, no second tool.

TextSight.ai

ONLY ONE IN THIS CATEGORY

Pick a competitor to drill into.

Originality.ai$14.95/mo

The SEO-team favorite. High accuracy on long-form, no Humanizer included.

STRENGTHLong-form SEO + fact-checker

WEAKNo humanizer, API on Enterprise ($179/mo)

vs Originality.ai →

GPTZero$10.40/mo

Born in academia. Strong with educators (LMS, Canvas), lighter on writer workflows.

STRENGTHEducator + LMS integrations

WEAKNo rewrites, no model attribution

vs GPTZero →

Copyleaks$13.99/mo

Enterprise stack: AI detection + plagiarism + LMS + 30+ languages.

STRENGTHPlagiarism + compliance

WEAKCredit-based pricing, no Humanizer

vs Copyleaks →

Winston AI$10.00/mo

Marketed at universities. Strong forensic PDF reports, humanizer is paid extra.

STRENGTHPolished PDF reports

WEAKHumanizer is a paid add-on

vs Winston AI →

Undetectable.ai$5.00/mo

A humanizer with no detector. You rewrite, then verify on a separate tool.

STRENGTHCheap per-word humanization

WEAKNo detector — no verification loop

vs Undetectable.ai →

All six, one table

The full picture.

	TextSight From $7.49/mo BEST OVERALL	Originality.aiFrom $14.95/mo	GPTZeroFrom $10.40/mo	CopyleaksFrom $13.99/mo	Winston AIFrom $10.00/mo	Undetectable.aiFrom $5.00/mo
Self-reported accuracy	Not published	99.41%	~98%	99.12%	99.98%	AI Humanizer only
AI Humanizer (one-click) Bundled	✓ 3 modes	—	—	—	Add-on	✓ Only
Humanization Score (0–100) Bundled	✓	—	—	—	—	—
Sentence-level highlighting	✓	✓	✓	✓	✓	—
Plagiarism check	✓	✓	✓	✓	✓	—
Free tier	20K chars/mo	None	10K w/mo	Trial only	14-day trial	None
Most popular tier	$14.99/mo Pro Unlimited scans	$14.95/mo 200K w/mo	$10.40/mo Premium 300K w/mo	$13.99/mo ~25K w/mo	$16/mo Advanced 200K credits	$10/mo 50K words
Enterprise / top tier	$59.99/mo	$179/mo	$20.10/mo Pro	$74.99/mo Pro	$26/mo Elite	$209/mo Unlim.
API access	Business+ ($29.99/mo)	Enterprise only ($179/mo)	Paid add-on	✓ Pro ($74.99/mo)	✓ Advanced+	✓ Paid plans
Bulk file scan	✓	✓	✓ Up to 250 files	✓	✓	✓
Chrome extension	✓	✓	✓	✓	✓	✓
Scan history retention	Unlim. (Enterprise)	30d / 365d (Ent)	Limited	90d	Limited	—

Pricing shown reflects annual billing rates as of May 2026. AI detection is probabilistic — see accuracy methodology for caveats.

Real Pricing Math

Cost per scan.

At a typical 500-word average scan, here's what each tool's "popular" tier costs you per use.

Tool	Plan	$/mo	Words/mo	Scans @ 500w	$/scan
TextSight	Pro	$14.99	Unlimited scans	∞	$0.00
Originality.ai	Pro	$14.95	200,000	400	$0.037
GPTZero	Premium	$10.40	300,000	600	$0.017
Copyleaks	Personal	$13.99	~25,000	~50	$0.280
Winston AI	Essential	$10.00	80,000	160	$0.063
Undetectable.ai	10K (humanizer only)	$5.00	10,000	20	$0.250

Math: monthly word allowance ÷ 500-word scan size = scans available. Cost ÷ scans = $/scan. TextSight Pro charges for unlimited scans, so per-scan cost trends to zero with usage.

TEXTSIGHT

Half the price. The Humanizer is built in.

$7.49 vs $14.95 to start (annual billing). Native Humanizer with Rewrite Suggestions. Detect-then-fix in one workflow — Originality is detection-only.

$7.49/mo (annual) starting price
Humanization Score (0–100)
Per-sentence Rewrite Suggestions
3 humanizer intensity modes
20 free writing tools included
3 scans a day free, no card

vs

ORIGINALITY.AI

Originality.ai

99.41% self-reported accuracy. Includes a fact-checker TextSight doesn't. But detection-only — you need a second tool (typically Undetectable.ai) to fix flagged sentences.

$14.95/mo Pro starting price
99.41% self-reported accuracy
Fact-checker (unique to Originality)
No Humanizer
API on Enterprise only ($179/mo)
No free tier

TEXTSIGHT

Detect-then-fix in one tool.

Detection accuracy is comparable. The difference is what happens after the verdict: TextSight hands you a one-click rewrite with 3 intensity modes. GPTZero hands you a verdict and a Canvas link.

$7.49/mo (annual) starting price
Calibrated detection with published methodology
Built-in Humanizer + Rewrite Suggestions
3 humanizer intensity modes
20 free writing tools
3 scans a day free, no card

vs

GPTZERO

GPTZero

Built around educator workflows: LMS integrations, bulk grading, multilingual classroom features. If you're grading student submissions through Canvas or Moodle, GPTZero is still the better fit.

$10.40/mo Premium (annual)
~98% self-reported accuracy
Canvas / Moodle / D2L LMS integrations
10,000 words/month on free tier
No Humanizer or Rewrite Suggestions
API as paid add-on

TEXTSIGHT

Flat subscription. Humanizer in the same scan.

Copyleaks is an enterprise stack with credit-based pricing — fine for compliance teams, painful for solo writers. TextSight is flat-rate subscription with detection + humanization bundled.

$7.49/mo (annual) starting price
Calibrated detection with published methodology
Flat subscription — no credits
Built-in Humanizer with 3 modes
Single workspace, not multi-console
20 free writing tools

vs

COPYLEAKS

Copyleaks

Started as a plagiarism tool. AI detection + plagiarism + LMS integrations + 30+ languages + credit-based pricing. Enterprise compliance is excellent; everyday writing workflow is clunky.

$13.99/mo Personal (~25K words/mo)
99.12% self-reported accuracy
Credit-based pricing
LMS integrations + 30+ languages
No Humanizer
$0.28 per scan effective rate at entry tier

TEXTSIGHT

Rewrite + verify in the same scan.

After every rewrite, our Humanization Score updates so you can stop guessing whether your changes worked. Undetectable rewrites, then leaves you to verify on a separate tool.

Detector + Humanizer in one workflow
Humanization Score updates after each rewrite
Free tier: 3 actions a day (scans or humanizations, any mix), 1,500 words per scan, 260 words per humanization
Pro: 50K humanizer words/mo at $14.99/mo (annual)
20 free writing tools included

vs

UNDETECTABLE.AI

Undetectable.ai

A pure humanizer with no detector. If you only need raw humanization volume and don't care about verification, per-word pricing can be cheaper at the entry tier.

$5/mo entry — no detector
$0.25/scan effective rate at 10K plan
No Humanization Score
Verify externally on a 3rd-party detector
No bundled writing tools

TEXTSIGHT

Humanizer included. Not bolted on.

Winston's a fine detector with the highest self-reported accuracy in this comparison (99.98%). But the rewrite tool is a separate paid add-on — TextSight bundles detection and humanization at flat subscription rates.

$7.49/mo (annual) starting price
Built-in Humanizer on every paid plan
3 humanizer intensity modes
20 free writing tools
Rewrite Suggestions for every flagged line
3 scans a day free, no card

vs

WINSTON AI

Winston AI

99.98% self-reported accuracy and a forensic PDF report tailored for grading committees. Premium positioning, premium upsells.

$10/mo Essential starting price
99.98% self-reported accuracy
Forensic PDF report for grading committees
Humanizer is a separate paid add-on
14-day trial only — no free tier
20+ languages

Methodology

How we tested.

Same 1,000 documents, run through every vendor's lowest paid plan in May 2026.

DATASET

200 human-written, 200 ChatGPT-4o, 200 Claude 3.5, 200 Gemini 1.5, 200 Llama 3. Genres mixed: blogs, essays, emails, fiction.

METRICS

Accuracy = correct verdicts ÷ total docs. False-positive rate = human docs flagged as AI ÷ total human docs.

PRICING

Lowest paid plan listed publicly on May 5, 2026. Annual discounts excluded. Add-ons noted separately.

FAIRNESS

Yes, we made this comparison. We also published the dataset so you can rerun it. Ask for it →

Decision Guide

When to choose each tool.

Honest take. Each tool is built for a different user. Pick the one that fits how you work.

Choose TextSight if…

You write content that needs to pass AI detection — and you don't want to spend 20 minutes copy-pasting between a detector and a separate humanizer for every draft.

Choose Originality.ai if…

You're an SEO agency that needs plagiarism + AI detection + fact-checking in one pass for client deliverables. You don't write the content yourself.

Choose GPTZero if…

You're an educator running high volumes of free scans. The free tier is the most generous in the market at 10,000 words/month.

Choose Copyleaks if…

You need enterprise compliance, LMS integration, and you can justify the $74.99/mo Pro tier. Overkill for individual writers.

Choose Winston AI if…

You scan very high volumes (500K+ words/month) and don't need a humanizer. Best $/scan ratio at scale among detection-only tools.

Choose Undetectable.ai if…

You only want a rewriter, not a detector. Risky workflow — you'll never know if your rewrite passed without running a separate detector after.

The Verdict

What makes us different.

Three things that set our workflow apart in 2026.

📊

Humanization Score

A 0–100 Humanization Score that tells you how human your text reads, not just a binary "AI / not AI" verdict. So you know exactly how close you are to passing.

✨

One-Click Humanizer

Three intensity modes — Light, Balanced, Maximum. Rewrites only the sentences flagged by detection. Other tools detect and stop; we close the loop.

💰

One Subscription, Both Tools

$14.99/mo Pro = unlimited scans + humanizer + scan history. Replacing both Originality ($14.95) + Undetectable ($9.99) saves you $9.95/month and one tab in your browser.

FAQ

Common questions about the comparison

What's the main difference between TextSight and Originality.ai?

Both ship strong AI detection (Originality self-reports 99.41% accuracy; TextSight publishes its methodology rather than a single headline number). The product difference is the AI humanizer. TextSight ships a one-click rewrite in the same scan; Originality is detection-only and you need a second tool (typically Undetectable.ai) to fix flagged sentences. Originality includes a fact-checker that TextSight does not. See /originality-ai-alternative/ for the full comparison.

How does TextSight compare to GPTZero?

GPTZero is built around educator workflows (LMS integrations, bulk grading, multilingual classroom features). TextSight is built around writer workflows (detect-then-fix in one tool, three humanizer intensity modes). Detection accuracy is comparable. If you're grading student submissions through Canvas/Moodle, GPTZero is still the better fit. If you're a writer checking your own drafts, TextSight is closer to the actual loop. See /gptzero-alternative/ for the full comparison.

How does TextSight compare to Copyleaks?

Copyleaks is an enterprise stack: AI detection + plagiarism + LMS integrations + 30+ languages + credit-based pricing. TextSight bundles AI detection + humanizer at flat subscription pricing (no credits). Copyleaks is the better fit for enterprise compliance and multilingual classrooms; TextSight is more direct for solo writers and agencies. See /copyleaks-alternative/ for the full comparison.

Is TextSight better than Undetectable.ai?

Different products. Undetectable is a humanizer with no detector — you rewrite, then verify on a separate tool. TextSight bundles both, with a Humanization Score that updates after every rewrite so you can stop guessing whether your changes worked. If you only need raw humanization volume and don't care about verification, Undetectable's per-word pricing can be cheaper at the entry tier. See our Undetectable.AI alternative page for the full comparison.

Which AI detector is the most accurate?

The competitors we compare cluster within 1–2 percentage points on their self-reported benchmarks: Originality 99.41%, Copyleaks 99.12%, Winston AI 99.98%, GPTZero ~98%. TextSight publishes its methodology rather than a single headline number. The differences are within statistical noise on most independent test corpora — accuracy is rarely the deciding factor. The workflow after the verdict is what differs. AI detection is probabilistic — see accuracy methodology for caveats.

Which tool should an SEO agency pick?

If you need detection + humanization in one workflow + API access at a reasonable price, TextSight Business ($29.99/mo, 10K API calls/mo) is built for that. Originality has an Enterprise-only API at $179/mo. Copyleaks has bulk-grading workflows that suit education more than agencies. For solo SEO writers, Pro ($19.99/mo) covers detection + humanizer for unlimited scans. See /for-seo-agencies/ for the agency-specific workflow.

Can I use TextSight alongside another tool?

Yes — many users do. Common pairings: TextSight (detect+humanize) + GPTZero (educator workflows), TextSight + Copyleaks (compliance reporting), or TextSight + Originality (fact-checking). They're sold separately and there's no conflict in running both. The case for full switching is when the second tool's role can be absorbed into TextSight's workflow without losing essential features.

More TextSight comparisons.

Looking at a specific tool? Jump straight to the head-to-head or alternative page.

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TextSight vs StealthGPT

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TextSight vs WriteHuman

Detect-then-fix loop vs a standalone humanizer.

Read comparison →

Scribbr Alternative

A faster detector + rewriter for student drafts.

See the alternative →

Chegg AI Detector Alternative

Chegg publishes no AI score. What to use instead.

See the alternative →

Sapling Alternative

Writer-first detection with a one-click rewrite.

See the alternative →

Pangram Labs Alternative

Detection plus the rewrite Pangram leaves out.

See the alternative →

Writer.com Alternative

Detect + rewrite without the enterprise suite.

See the alternative →

QuillBot AI Detector Alternative

A detector that also fixes flagged sentences.

See the alternative →

Every tool we have looked at.

One page per tool, each written from that vendor's own live pages with the date we checked. Where a figure was not published, we say so rather than estimate it.

TextSight vs Originality, GPTZero, Copyleaks and Winston AI compared.

Key findings (May 2026)

Detector. Humanizer. Or both.

Detection Only

Humanizer Only

Detector + Humanizer

Pick a competitor to drill into.

The full picture.

Cost per scan.

Half the price. The Humanizer is built in.

Originality.ai

Detect-then-fix in one tool.

GPTZero

Flat subscription. Humanizer in the same scan.

Copyleaks

Rewrite + verify in the same scan.

Undetectable.ai

Humanizer included. Not bolted on.

Winston AI

How we tested.

When to choose each tool.

Choose TextSight if…

Choose Originality.ai if…

Choose GPTZero if…

Choose Copyleaks if…

Choose Winston AI if…

Choose Undetectable.ai if…

What makes us different.

Humanization Score

One-Click Humanizer

One Subscription, Both Tools

Common questions about the comparison

More TextSight comparisons.

Every tool we have looked at.

AI detectors and checkers (34)

AI humanizers and rewriters (29)

Head-to-head comparisons (2)

Further reading

Stop reading comparison articles. Try it.

Compare TextSight vs other AI detectors

Switching from another tool