{
 "schema_version": "1.0",
 "id": "quillbot",
 "name": "QuillBot",
 "research_status": "researched",
 "vendor_domain": "quillbot.com",
 "category": "Operations & Workflow",
 "task": "Writing & inbox",
 "summary": "Paraphrasing, grammar, summarising and plagiarism checking in one box of writing utilities.",
 "best_for": "students, non-native writers and anyone who wants quick paraphrasing, grammar and summarizing help",
 "skip_if": "you already use a general AI assistant that paraphrases and edits — QuillBot may be redundant",
 "honest_knock": "The free tier is deliberately narrow: 125 words per paraphrase and two of the modes. The honest framing is that this is a box of writing utilities -- paraphraser, grammar, plagiarism, AI detection -- rather than somewhere you actually write. General AI chat tools now overlap much of it. And treat the free AI detector as weak: in our test of 1 October 2026 it rated four plainly written machine texts 100% human and only caught a paragraph full of stock chatbot phrases. Note the sticker too: the advertised €8.33 a month assumes you pay for the year, and month-to-month is €19.95, about 2.4 times as much.",
 "pricing": {
  "status": "public",
  "entry_price": "$19.95",
  "entry_price_terms": "a month, or $8.33 a month billed annually ($99.95 a year)",
  "from_price_usd_month": 19.95,
  "plans": [
   {
    "name": "Free",
    "price": "$0",
    "includes": "paraphrase up to 125 words in 2 modes, humanizer up to 125 words and 6 uses a day, summaries to 1,200 words"
   },
   {
    "name": "Premium",
    "price": "$19.95 a month month-to-month, or $8.33 a month billed annually ($99.95 a year)",
    "includes": "58% off"
   },
   {
    "name": "Team",
    "price": "no published price",
    "includes": "routes to an enquiry"
   }
  ],
  "plans_source": "summarised from pricing.notes; every plan name and amount appears verbatim in those notes",
  "notes": "Read in a browser on quillbot.com/premium from a US exit (New York) on 8 September 2026, with the annual toggle operated in both positions; an EU read on 7 September showed the same figures in euros. Free at $0 (paraphrase up to 125 words in 2 modes, humanizer up to 125 words and 6 uses a day, summaries to 1,200 words). Premium is $19.95 a month month-to-month, or $8.33 a month billed annually ($99.95 a year), which the page presents as 58% off. The 40%-off promotion that showed $5.00 and ran to 6 September 2026 has ended. A Team plan exists but carries no public price; it routes to an enquiry. The old /pricing URL still returns 404, and /upgrade shows a sign-up wall when signed out. Re-read 26 September 2026 in a browser from a Netherlands exit with the toggle operated in both positions: EUR 19.95 a month month-to-month and EUR 8.33 a month billed annually, still labelled 58% off; Team still routes to an enquiry.",
  "verified_at": "2026-09-26",
  "source_url": "https://quillbot.com/premium"
 },
 "free_plan": true,
 "free_plan_evidence": "Free at $0 (paraphrase up to 125 words in 2 modes, humanizer up to 125 words and 6 uses a day, summaries to 1,200 words).",
 "cost_traps": [],
 "compare_with": {
  "name": "Grammarly or a general AI assistant",
  "why": "broader writing tools"
 },
 "links": {
  "record": "https://aibuildermarketplace.com/api/v1/products/quillbot.json",
  "review": "https://officesoftwaremarketplace.com/quillbot-review.html",
  "marketplace": "https://aibuildermarketplace.com/marketplace/quillbot/",
  "vendor_site": "https://quillbot.com"
 },
 "purchase": {
  "seller": "the vendor",
  "how": "AIBuilder Marketplace does not sell this software. Sign up, start a trial or buy on the vendor's site.",
  "handoff_url": "https://quillbot.sjv.io/YVmxQO",
  "affiliate": true,
  "disclosure": "Where purchase.affiliate is true, purchase.handoff_url is an affiliate link: AIBuilder Marketplace may earn a commission at no extra cost to the buyer. Commission never changes what a record says, and products are not ranked by commission. Where it is false the link is the vendor's plain site."
 },
 "provenance": {
  "research": "hand-researched dossier, read on the vendor's own pages",
  "researched_since": "2026-07",
  "method": "https://aibuildermarketplace.com/how-we-review/",
  "license": "CC BY 4.0. Credit 'AIBuilder Marketplace' with a link to https://aibuildermarketplace.com/atlas/.",
  "note": "A rebuild is not a new measurement: pricing.verified_at is the date that matters."
 },
 "cost": {
  "status": "not_yet",
  "engine": "https://aibuildermarketplace.com/agents/#cost",
  "rules": null,
  "growth": null
 },
 "unknowns": [
  "Contract terms (cancellation, data export, data location, minimum seats) are not researched as separate fields; pricing.notes mentions them only where the vendor's pricing page does.",
  "No computable price rules yet: cost at a given team size cannot be calculated for this product."
 ],
 "task_evidence": {
  "structured_checks": [],
  "sessions": [
   {
    "source": "session",
    "product_name": "QuillBot",
    "product_id": "quillbot",
    "run_date": "2026-10-01",
    "what": "A free account, used on QuillBot's AI Detector, AI Humanizer and Paraphraser. We ran the detector over the texts of known authorship we used for our Pangram test the same day: three passages from public-domain books, a paragraph one of us typed for the test, three paragraphs a language model wrote for our own reviews, and one Claude wrote on the spot. We added a control paragraph written in stock chatbot phrasing, sent it through the Humanizer, and checked the rewrite in QuillBot's detector and in Pangram.",
    "findings": [
     "The detector scored all eight texts 0% AI, the four machine-written ones included. Our three review paragraphs and the paragraph Claude wrote on the spot each came back '100% Human-written'. Pangram, given the same eight texts the same day, labelled every one correctly.",
     "It does catch AI text that sounds like AI. The control paragraph, which opens “In today's fast-paced digital landscape”, scored 100% AI, with the stock phrases underlined and the opening sentence listed as 'High'. In our test it picked up the style, not the authorship: plainly written machine text passed as human.",
     "The Humanizer and the detector disagree. The Humanizer rewrote the control paragraph and reported '0 AI signals' on its own output. QuillBot's detector scored that same output 100% AI. Pangram scored it 100% AI too and added that it 'appears to have been paraphrased or rewritten'. The rewrite mostly swapped words: 'seamless' became 'smooth', 'In conclusion' became 'Simply put'.",
     "Every result came with the prompt 'Want your text to sound more authentic? Refine with Paraphraser', including on texts the detector had just rated 100% human.",
     "Signed out, the detector ran four checks (689 words) and then asked us to sign up. It will not run below 40 words, and under 80 it shows 'For more accurate results, add at least 80 words'; it still scored our 71-word paragraph.",
     "The free Paraphraser's 125-word cap is real, and stricter than it sounds. Given 219 words, it reported '219/125 words. Limit exceeded' and showed only the first sentence of the rewrite, with the rest blurred behind an upgrade button, not the first 125 words.",
     "Not tested: Premium, the plagiarism and grammar checkers, the Humanizer's daily use limit, languages other than English and texts longer than 219 words. The detector page showed model version v7.1.0."
    ],
    "not_tested": null,
    "report": null,
    "result": "reported",
    "note": "Findings as written up after the session; no pass/fail per task was scored.",
    "in_catalog": true
   }
  ]
 },
 "open_questions": [
  {
   "question_id": "quillbot:cancellation_terms",
   "key": "cancellation_terms",
   "question": "Can a customer cancel at any time, and what happens to an annual plan that is cancelled mid-term?",
   "status": "open"
  },
  {
   "question_id": "quillbot:data_export",
   "key": "data_export",
   "question": "Which data can a customer export, in which formats, on which plans?",
   "status": "open"
  },
  {
   "question_id": "quillbot:data_location",
   "key": "data_location",
   "question": "Where is customer data stored, and can a customer choose the region?",
   "status": "open"
  },
  {
   "question_id": "quillbot:minimum_seats",
   "key": "minimum_seats",
   "question": "Is there a minimum number of seats or users on any plan?",
   "status": "open"
  }
 ],
 "vendor_answers": [],
 "agent_channels": {
  "vendor_mcp": null,
  "agent_checkout": {
   "status": "not_checked",
   "detail": "We could not read the vendor's pages as plain HTML.",
   "checked_at": "2026-10-07",
   "method": "homepage, /pricing and the pricing page we cite, read as plain HTML (no JavaScript) and searched for explicit support of purchases by AI agents: Agentic Commerce Protocol, Instant Checkout, Agent Payments Protocol, buy in ChatGPT, agentic checkout"
  }
 }
}