Copyleaks does plagiarism and AI detection at enterprise scale. TextSight does the same detection tier and ships a one-click humanizer to rewrite the flagged sentences — without a second subscription or a credit-system pricing maze.
Copyleaks built a credible enterprise stack: AI detection, plagiarism checking, LMS integrations, multilingual support, and an API that university IT departments trust. Their detector accuracy is competitive with the rest of the top tier (they self-report 99.12%). The product is genuinely solid for the educator-and-compliance crowd.
The product gap is what happens after the verdict. Copyleaks tells you a piece of text is AI-generated and which passages are flagged. It does not offer a humanizer at any tier. Writers who actually need to fix flagged content open a second tool (Undetectable.ai, QuillBot, or similar) — costing time, an extra subscription, and an awkward copy-paste workflow.
TextSight ships detection and humanization in one product at one subscription tier. Up to 99.2% accuracy in our internal benchmark, sentence-level highlights ranked by suspicion, and a one-click humanizer with three intensity modes (Light / Balanced / Maximum) that rewrites the flagged sentences in place. The same scan re-scores after the rewrite, so you verify before you ship.
The pricing math is also cleaner. Copyleaks uses a credit-based model where every scan and every check costs a credit. TextSight Pro at $14.99/month annual is flat: unlimited scans, 50K words of humanizer, plagiarism check included. No counting credits, no buying packs, no surprise overage.
Copyleaks ships detection + plagiarism. They do not offer a humanizer. The moment you need to fix flagged AI-written content, you leave their ecosystem for a second tool.
Every scan, every AI check, every plagiarism check spends credits from a shared pool. Predicting monthly cost requires translating your workflow into credit equivalents — easy to underestimate, easy to overpay.
Bulk grading, classroom integrations, and enterprise SSO are excellent. For solo writers and small teams, the UI is heavier than needed and the entry tier feels like overkill.
Copyleaks built their reputation on plagiarism. The AI detector is newer and is bolted onto the existing scan pipeline rather than being the headline product. It works — but other tools have spent more design time on the writer's specific detect-and-fix loop.
The free trial is plagiarism-focused. Sustained AI detection use requires a paid plan from day one. TextSight ships 3 free AI scans per day with no card.
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 Copyleaks — switching means starting fresh on a new account.
They cluster in the same range: Copyleaks self-reports 99.12%, TextSight reports up to 99.2% in our internal benchmark. Both vary by content type and test corpus. The 0.08% gap is well within statistical noise on any independent test set — accuracy is not the differentiator between these two tools.
Not natively. TextSight integrates via API and webhook. If your workflow depends on a native LMS plugin, Copyleaks is still the better fit for the classroom side of the workflow — you can keep Copyleaks for grading and use TextSight for personal writing.
No. Credits stay in Copyleaks and don't transfer. We recommend running both tools side-by-side for a week before cancelling Copyleaks so you can verify TextSight handles your workflow.
Copyleaks supports 30+ languages natively. TextSight is English-focused — it works on other Latin-alphabet languages but accuracy drops outside English. For comprehensive multilingual detection, Copyleaks is the better fit.
Yes — Maximum mode is our most aggressive rewrite, designed for cases where the score matters more than the voice. Light and Balanced modes preserve more of your original phrasing and are better for personal writing and editorial work.
Yes — plagiarism checking is included on TextSight Starter ($9.99/mo) and above. The depth of source matching may differ from Copyleaks' enterprise plagiarism index, but for general content verification it's a comparable tool.
Not yet. Copyleaks has compliance-focused reporting (audit trails, signed scan certificates) tuned for enterprise legal and academic-integrity workflows. TextSight focuses on the writer's detect-and-fix loop. If signed compliance reports are a hard requirement, stay with Copyleaks for that workflow.
Detect AI. Fix AI. One tool. 3 free scans/day, no card required.