GPTZero is built for educators grading other people's writing. TextSight is built for writers who need to detect AND fix in one tool. The humanizer GPTZero doesn't ship is the difference.
GPTZero is one of the most-used AI detectors in the world. The free tier — 10,000 words/month, no signup hassle — is the most generous in the category. Their bulk-grading and LMS integrations are excellent. They genuinely solved the educator use case.
The product gap is the writer use case. GPTZero gives you a percentage and sentence-level highlights — and stops. There's no humanizer at any tier. Their entire pricing structure is built around volume of detection (Premium: 300K words/mo, Professional: 500K), not the writer's actual workflow of detect-then-fix.
The result: most GPTZero users who actually need to fix flagged text run their content through GPTZero, then through Undetectable.ai or another humanizer, then back through GPTZero to verify. Three tools, two browser tabs, two subscriptions. TextSight collapses that into one product.
TextSight is what GPTZero would look like if it were built for writers instead of educators. Same detection accuracy. Sentence-level highlights ranked by severity. One-click humanizer in the same scan. Three intensity modes (Light, Balanced, Maximum) to match how aggressive a fix you actually need.
GPTZero ships detection only. Free, Premium ($10.40/mo), Professional ($20.10/mo), Enterprise — all detection-only. The moment you need to fix flagged text, you leave their ecosystem.
Their LMS integrations, bulk grading, multilingual classroom features are world-class. For writers, the same UI feels like grading software — not a tool for your own work.
Each sentence is colored red/yellow/green, but the explanation of why a sentence scored high (sentence-length variance, bridge-word density, generic structure) isn't surfaced. Hard to learn from feedback you can't read.
GPTZero serves Singapore Dollar, Australian Dollar, Indian Rupee prices in those geographies without clear USD-equivalent comparison. Hard to compare against US-priced competitors during evaluation.
Generous for casual checking, useless for any sustained writing workflow. A serious writer producing 8-12 articles/month hits the cap by week 2 and is forced to upgrade.
Pricing reflects annual billing rates as of May 2026. Self-reported accuracy from each vendor's pricing pages.
Honest about the friction. There's no data migration between TextSight and GPTZero — switching means starting fresh on a new account.
Yes, in some workflows. GPTZero's LMS integrations, bulk-grading tools, and classroom-specific features are more mature than TextSight's. If your primary use case is grading student submissions through Canvas, Moodle, or Blackboard, GPTZero may still be the better fit. See /for-teachers/ for the writer-focused educator workflow on TextSight.
Yes. Many users do — keep GPTZero for educator workflows, use TextSight for personal writing. They're sold separately. The only argument for full switching is if your detection + humanization workflow is consolidated enough that two tools is overhead.
TextSight bundles the humanizer. GPTZero Premium ($10.40) + Undetectable.ai 35K tier ($15.75) = $26.15/month total — more expensive than TextSight Pro at $14.99/mo. The "GPTZero is cheaper" framing only holds if you don't need humanization at all.
TextSight is English-focused — it works on other Latin-alphabet languages but accuracy drops outside English. For comprehensive multilingual detection (Asian languages, RTL scripts), GPTZero Premium is the better tool.
Yes — both tools keep scans in their own systems. There's no export/import between them. You'll start fresh on TextSight.
Not yet. GPTZero's Chrome extension highlights AI text on any web page; TextSight's extension is on the roadmap but not shipped. If browser-based scanning while you write is critical, this is one feature GPTZero currently does better.
No. Hallucination detection (verifying factual claims in AI-written text) is a different product category — TextSight focuses on the writer's detect-and-fix loop. For hallucination/source verification, dedicated tools or GPTZero's feature is the right choice.
Detect AI. Fix AI. One tool. 3 free scans/day, no card required.