SIDE-BY-SIDE 2026 comparison · self-reported accuracy · honest verdict

TextSight vs Originality, GPTZero, Copyleaks & Winston AI.

We compared 5 leading AI content tools on price, features, and accuracy. TextSight bundles a detector and AI rewriter in one workflow — see how the trade-offs compare.

Key findings (May 2026)

  • TextSight bundles a detector and an AI rewriter 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 + AI rewriter combined in one free tier: TextSight (3 free scans/day, no signup needed).
The Finding

Detector. AI Rewriter. 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 authenticity 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
✨

AI Rewriter Only

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

  • Undetectable.ai
🎯

Detector + AI Rewriter

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 AI Rewriter included.
STRENGTHLong-form SEO + fact-checker
WEAKNo AI rewriter, 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 AI Rewriter
vs Copyleaks →
Winston AI$10.00/mo
Marketed at universities. Strong forensic PDF reports, AI rewriter is paid extra.
STRENGTHPolished PDF reports
WEAKAI Rewriter is a paid add-on
vs Winston AI →
Undetectable.ai$5.00/mo
An AI rewriter with no detector. You rewrite, then verify on a separate tool.
STRENGTHCheap per-word authenticity
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 accuracyUp to 99.2%99.41%~98%99.12%99.98%AI Rewriter only
AI Rewriter (one-click) Bundled✓ 3 modes———Add-on✓ Only
Authenticity Score (0–100) Bundled✓—————
Sentence-level highlighting✓✓✓✓✓—
Plagiarism check✓✓✓✓✓—
Free tier3 scans/dayNone10K w/moTrial only14-day trialNone
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 accessBusiness+ ($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 retentionUnlim. (Enterprise)30d / 365d (Ent)Limited90dLimited—
Student discount$13.99/mo .edu—————

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 (AI rewriter 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 wins on bundled AI Rewriter + price. Originality wins on fact-checker + brand recognition for SEO teams.
TEXTSIGHT

Half the price. The AI Rewriter is built in.

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

  • $7.49/mo (annual) starting price
  • Authenticity Score (0–100)
  • Per-sentence Rewrite Suggestions
  • 3 AI rewriter intensity modes
  • 20 free writing tools included
  • 3 scans/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 AI Rewriter
  • API on Enterprise only ($179/mo)
  • No free tier
TextSight wins on writer workflow + bundled AI Rewriter. GPTZero wins on educator + LMS integrations.
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
  • Up to 99.2% self-reported accuracy
  • Built-in AI Rewriter + Rewrite Suggestions
  • 3 AI rewriter intensity modes
  • 20 free writing tools
  • 3 scans/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 AI Rewriter or Rewrite Suggestions
  • API as paid add-on
TextSight wins on flat subscription + bundled AI Rewriter. Copyleaks wins on enterprise compliance + plagiarism stack.
TEXTSIGHT

Flat subscription. AI Rewriter 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 + authenticity bundled.

  • $7.49/mo (annual) starting price
  • Up to 99.2% self-reported accuracy
  • Flat subscription — no credits
  • Built-in AI Rewriter 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 AI Rewriter
  • $0.28 per scan effective rate at entry tier
TextSight bundles detection + authenticity. Undetectable.ai is AI rewriter-only — you still need a separate detector.
TEXTSIGHT

Rewrite + verify in the same scan.

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

  • Detector + AI Rewriter in one workflow
  • Authenticity Score updates after each rewrite
  • Free tier: 3 scans/day + 2 AI rewriter uses
  • Pro: 50K AI rewriter words/mo at $14.99/mo (annual)
  • 20 free writing tools included
vs
UNDETECTABLE.AI

Undetectable.ai

A pure AI rewriter with no detector. If you only need raw authenticity 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 Authenticity Score
  • Verify externally on a 3rd-party detector
  • No bundled writing tools
TextSight bundles the AI Rewriter Winston charges extra for. Winston wins on forensic PDF reports for grading committees.
TEXTSIGHT

AI Rewriter 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 authenticity at flat subscription rates.

  • $7.49/mo (annual) starting price
  • Built-in AI Rewriter on every paid plan
  • 3 AI rewriter intensity modes
  • 20 free writing tools
  • Rewrite Suggestions for every flagged line
  • 3 scans/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
  • AI Rewriter 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 AI rewriter 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 an AI rewriter. 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.

📊

Authenticity Score

A 0–100 Authenticity 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 AI Rewriter

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 + AI rewriter + 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 at similar self-reported accuracy (TextSight: up to 99.2% internal benchmark; Originality: 99.41%). The product difference is the AI rewriter. 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 AI rewriter 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 + AI rewriter 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 an AI rewriter with no detector — you rewrite, then verify on a separate tool. TextSight bundles both, with an Authenticity Score that updates after every rewrite so you can stop guessing whether your changes worked. If you only need raw authenticity 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?
All five tools we compare cluster within 1–2 percentage points on their self-reported benchmarks: TextSight up to 99.2% (internal benchmark), Originality 99.41%, Copyleaks 99.12%, Winston AI 99.98%, GPTZero ~98%. 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 + authenticity 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 + AI rewriter 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+rewrite) + 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.

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