QuillBot became the go-to student writing suite by leading with one of the best paraphrasers around and adding grammar, a summarizer, a citation generator, a translator, and a detector tab. It lives in your browser and your Docs editor while you draft, and that is exactly what it is good at. TextSight comes at the essay from the other end: it is a purpose-built AI detector with a meaning-preserving rewriter, and its job is the self-check you run after the draft is done, when you want to know how your writing reads to a detector and which sentences to look at. This page is written for the student deciding which one they actually need, where each is the right call, and how the two fit together without crossing any academic-integrity line.
A short table first, from a student's chair. These two tools sit at different stages of the same essay, so most rows are about which job each one is built for, not who scores higher. The sections below go deeper, including where QuillBot is genuinely the better call.
| What a student needs | TextSight | QuillBot |
|---|---|---|
| What it is built for | A self-check AI detector with a meaning-preserving rewriter | A paraphraser-first writing suite with a detector tab |
| When you reach for it | After the draft is done, to see how it reads to a detector | While drafting, to reword and polish |
| Paraphrasing source quotes | A simple free paraphraser, not the focus | Multiple modes, synonym and freeze controls |
| Grammar, summarizer, citations | Lighter free tools for some of these | All bundled in one suite |
| In-editor Docs and Word plugins | Chrome extension for scanning text in place | Docs add-on and Word plugin that rewrite inline |
| Reading a detector result | Sentence-by-sentence map with a reason on each line | One document-level percentage |
| International / ESL writing | Detector calibrated so formal ESL prose is less mis-flagged | Grammar help is strong; detector is a secondary tab |
| Free tier for the job | 3 scans/day at 5,000 chars, no signup, sentence highlights | Light paraphrasing and a basic grammar pass |
| TextSight pricing | Free, Starter $9.99/mo, Pro $19.99/mo ($14.99/mo yearly) | Suite subscription; see QuillBot's pricing page |
| Best fit | A reliable pre-submission self-check on your own writing | Paraphrasing, grammar, and citation help while you write |
Win markers reflect the student-side fit for each job, not a third-party audit. QuillBot pricing moves with promotions; check its page before subscribing.
Four things QuillBot does better than TextSight will ever try to. Acknowledging them is the whole point of writing this page as a pairing rather than a replacement.
QuillBot started life as a paraphraser and it is still one of the most polished around. Multiple rewrite modes, sentence-by-sentence comparison, synonym control, freeze-word controls, and a Docs and Word plugin that rewrites in place inside the editor. For rewording source material into your own phrasing, turning a dense academic passage into plain English, or tightening a long quote into a usable summary, QuillBot is genuinely the right primary tool. TextSight ships a simple free paraphraser at /tools/paraphraser/, but it is not the focus of the product and it is not trying to win that job.
QuillBot Premium bundles the paraphraser, grammar checker, summarizer, citation generator, translator, and a detector tab behind one subscription. If you already rely on three or more of those every week, paying once for the bundle is easier than stitching together separate tools, and the in-editor convenience is a real part of the value. TextSight does not try to replace that suite.
QuillBot ships browser extensions plus a Google Docs add-on and a Microsoft Word plugin, so the paraphraser and grammar checker run inside the editor you are already writing in. You select a sentence, rewrites appear in the sidebar, you click one to swap it. For a student living in Google Docs or an LMS through a deadline week, that ambient coverage is the natural default and it is where QuillBot earns its keep.
QuillBot's free plan handles light paraphrasing and a basic grammar pass, which for occasional rewording of a tricky paragraph may be all you need. TextSight does not compete on paraphrasing; the intended split is QuillBot Free or Premium for the writing-suite layer, and TextSight for the self-check on the finished draft.
For paraphrasing, grammar polish, summarizing long readings, generating citations, and the in-editor plugins, QuillBot is the right primary writing suite. The rest of this page is about the one job it was not built to do: telling you how your finished essay reads to a detector, line by line.
QuillBot's AI detector is a feature inside a writing suite. TextSight is a detector. That difference shows up in five specific places that matter for the pre-submission scan.
QuillBot added a detector to a tool that began as a paraphraser, and it sits in the menu next to several writing utilities. TextSight is built around detection. The model is updated as new generators appear, and the classifier reads structure, not just vocabulary. For a self-check where the reading is the entire reason you opened the tool, a purpose-built detector is the steadier call than a tab inside a paraphrasing suite.
Every TextSight scan returns a sentence-by-sentence colour map with a short reason on each line: flat rhythm, clustered vocabulary, even cadence, low sentence-length variance. You see the exact lines that pulled the reading down and revise those, instead of rewriting the whole essay or running it through a paraphraser blind. A document-level percentage tells you the score moved but not which sentences moved it. Per-line evidence is what turns a self-check from guesswork into a short, targeted edit.
Generalist detectors have been challenged by university policy offices for over-flagging formally-taught ESL writing. TextSight is calibrated against international student writing, including Indian, Filipino, and Chinese English, so the prose a non-native student actually wrote is less likely to come back as a false flag. QuillBot's grammar checker is genuinely useful for non-native writers while drafting; TextSight's calibration matters at the other end, the moment you are worried about being mislabelled. Different jobs, both useful.
When a self-check flags a few lines, the built-in rewriter revises them while keeping your voice and your facts intact, so the result still reads like you. That is a different intent from running a whole essay through a paraphraser, which is built to reword rather than to keep a draft honestly yours and can leave output that reads oddly uniform. The point of the TextSight rewriter is to help you tidy the sentences a detector reacts to on writing you wrote, not to launder AI text past your school.
TextSight's free tier is three scans a day at 5,000 characters per scan, roughly 1,500 to 1,800 words, with no email, no card, and sentence-level highlights included. Starter is $9.99/mo and Pro is $19.99/mo, or $14.99/mo billed yearly, with unlimited scans. The honest split: QuillBot is the cheaper primary tool if your need is paraphrasing and grammar; TextSight is the better value if your need is a dependable pre-submission read on your own essay.
The honest workflow is not QuillBot versus TextSight. It is QuillBot during drafting for paraphrasing and grammar, then TextSight as the pre-submission AI calibration pass. Two tools serving two stages of the same essay.
Open Google Docs, Word, or your LMS editor with the QuillBot extension or Docs add-on active. Write the essay in your own voice from your own notes. When you need to reword a source quotation or simplify a dense paragraph, run it through the QuillBot paraphraser in Standard or Formal mode and pick the rewrite that preserves your meaning. Run the QuillBot grammar checker for clarity polish. The prose itself comes from you.
Open app.textsight.ai, paste the finished draft, and scan. Free tier handles 5,000 characters in one paste; Pro handles 10,000. The scan returns in roughly thirty seconds with an Authenticity Score, a sentence-by-sentence colour map, and a short rationale per flagged line. Because you drafted yourself rather than generating with ChatGPT, the score is usually high; QuillBot paraphrased sections are the most common red zones.
Above 75 on the Authenticity Score, submit as is. Between 50 and 75, rewrite the red sentences specifically and re-scan. Below 50, the essay needs more substantial editing or an AI rewriter pass. The integrated AI rewriter rewrites flagged lines in three modes (Light, Balanced, Maximum) while preserving your voice; use it on the hardest sentences if you have free uses left, or on every flagged line on a Pro plan.
Submit through your LMS as required. Because you pre-scanned and edited, any institutional AI report (Turnitin or otherwise) should land in the low-AI range. The 90-day TextSight scan history on Pro is real evidence if an examiner ever asks about a draft from three weeks ago, and the QuillBot version history inside Docs shows the drafting trail.
Three things. First, QuillBot handles the paraphrasing, grammar, and clarity layer that hurts your grade before you reach the AI question at all. Second, TextSight catches the AI-shaped sentences that a detector will flag, before your professor sees them. Third, the combined tooling makes the editing loop short: QuillBot fixes the writing and the source rewording, TextSight fixes the calibration, and you stop second-guessing whether the draft is ready to submit.
TextSight is free to start, $9.99 monthly on Starter, and $19.99 monthly on Pro ($14.99 monthly billed yearly). QuillBot sells a writing-suite subscription on top of a free tier; check its pricing page for the current figure, which moves with promotions. The two stacks cover different stages of the same essay, so this is not a replacement decision.
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Four common student situations and the realistic QuillBot plus TextSight stack for each. Pick whichever matches your next deadline.
Free tier on both. QuillBot Free for paraphrasing tricky source paragraphs at 125 words per request and a basic grammar pass. TextSight Free for a pre-submission AI scan: three scans a day at 5,000 characters covers a typical 800-word undergrad essay with two re-scan attempts. Total cost: zero.
Setup: QuillBot Free + TextSight Free.
Four to eight essays across two weeks. QuillBot Premium for unlimited paraphrasing, the summarizer, and the citation generator across the deadline week. TextSight Pro for unlimited scans, 10,000 character pastes, and longer scan history. Cancel both back to free after finals if you want.
Setup: QuillBot Premium + TextSight Pro.
Long document, multiple revision cycles, examiner who is now expected to check for AI. QuillBot Premium for paraphrasing source material into your own words and the summarizer for literature review compression. TextSight Pro for 10,000 character pastes per chapter section, file upload, and 90-day history that matters when an examiner asks about a draft from three weeks ago.
Setup: QuillBot Premium + TextSight Pro.
QuillBot Free or Premium for the grammar correction and paraphrasing polish that hurts non-native essays. TextSight specifically for the ESL calibration: pre-scan, expect scattered yellows on formally-taught prose, focus edits on clusters of red. The 90-day Pro history is real evidence if a false positive ever needs to be contested with a professor or honour board.
Setup: QuillBot Free or Premium + TextSight Pro.
The college-student landing page with perplexity and burstiness explained.
For college →The sibling writing-assistant-vs-dedicated-detector head-to-head from a student's angle.
Read the compare →Seven-tool ranking with Turnitin correlation and false-positive rates side by side.
See the ranking →The general head-to-head outside the student frame, with the paraphraser angle deeper.
Read the compare →Free to try. No card.
Honest head-to-heads with other detectors and humanizers.