QuillBot's main product is a paraphraser; the AI detector is an add-on. TextSight is built around the detection workflow — with a humanizer purpose-tuned to rewrite the sentences the detector flagged, not just to reword text in general.
QuillBot built the most-used paraphraser on the internet — somewhere north of 50 million monthly users. The grammar checker is solid. The summarizer is fine. The citation generator is convenient. The whole productivity suite, bundled at $19.95/mo monthly or $9.95/mo annual on Premium, is a legitimate value proposition for student writing.
The AI detector is a more recent addition. It works, but it's bolted onto the existing product rather than being the headline feature. The paraphraser is also not the same thing as a humanizer — paraphrasing reworks text in general, while humanization is specifically tuned to rewrite the sentences an AI detector flagged, in ways designed to drop the AI score. Different goals, different transformations.
TextSight is detection-first. The detector identifies which sentences read as AI-generated, the humanizer rewrites only those sentences using transformations targeted at the AI-fingerprint patterns, and the same scan re-scores so you can verify the rewrite landed. The Humanization Score (0-100) gives you a quantitative target instead of guessing whether the rewrite is good enough.
If your workflow is primarily paraphrasing and grammar, QuillBot is still the right bundle. If your workflow is specifically detect-and-fix-AI-content, TextSight is built for that loop.
QuillBot's paraphraser rewords text in general — synonym swaps, sentence restructuring, formality modes. It is not specifically tuned to rewrite AI-flagged sentences in ways that drop AI-detector scores. Sometimes paraphrasing reduces the score; sometimes it doesn't move it at all.
QuillBot's identity is paraphraser. The AI detector is a more recent add-on, surfaced as a secondary tab. The design and engineering attention is concentrated on the paraphraser — which means the detector lacks features like sentence-level highlights ranked by suspicion or a Humanization Score.
You get an overall AI percentage from the QuillBot detector and a paraphrased output from the paraphraser, but no single number tying them together. You can't track 'is this draft more human now than 5 minutes ago' with a numeric benchmark.
Run the detector. Open the paraphraser in another tab. Paste the flagged content. Get paraphrased output. Paste back. Re-run the detector. Repeat. Two-tool workflow inside the same product.
QuillBot Premium ($9.95/mo annual) bundles paraphraser, grammar checker, plagiarism, summarizer, citation generator, translator, AI detector. Great value if you use all of them. Worse value if your specific need is detect-and-fix-AI-content — you're paying for a productivity suite to get one feature.
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 QuillBot AI Detector — switching means starting fresh on a new account.
No. A paraphraser rewords text in general — synonym swaps, sentence restructuring, formality modes. A humanizer is purpose-tuned: it rewrites the specific sentences an AI detector flagged, using transformations designed to drop the AI-detection score. Both can produce similar-looking output, but they're optimized for different goals.
No. The humanizer preserves citations, numbers, attributions, and factual content — it rewrites the surface phrasing. If your draft has APA / MLA / Chicago citations, they survive the rewrite intact.
Depends on what you do most. If most of your time is grammar / paraphrasing / citation generation, QuillBot Premium at $9.95/mo bundles all of that well. If most of your concern is making sure submitted work doesn't get flagged by an AI detector, TextSight's detect-and-fix workflow is purpose-built for that. Many students use both: QuillBot for writing, TextSight for the final detection pass.
Not yet. The QuillBot extension is mature and polished. TextSight's extension is on the roadmap but not shipped. If inline browser-based writing assistance is core to your workflow, QuillBot has the better extension today.
TextSight reports up to 99.2% accuracy in our internal benchmark. QuillBot's published accuracy is harder to pin down — the AI detector is a newer addition and they don't publish a transparent methodology page. Independent benchmarks have rated TextSight competitively against the top detectors. We publish our methodology at /accuracy-methodology.html.
No. TextSight's citation generator (/tools/citation-generator/) starts you with a fresh library. If your existing QuillBot citation list is large, this is genuine switching friction — worth weighing against the workflow benefits.
Possibly — that's the honest answer. QuillBot Premium's strength is the integrated editor where every tool is one tab away. TextSight has 20+ tools at /tools/ but each is a separate page. If you value 'one editor with everything', QuillBot is a real upside. If you value 'detection workflow done well', TextSight is.
Detect AI. Fix AI. One tool. 3 free scans/day, no card required.