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QuillBot quillbot.com

Can AI replace QuillBot?

A paraphraser/summarizer/grammar wrapper over an LLM and LanguageTool is easy to build; the paid app wins on UX, extensions, plagiarism workflows, and bundled tools.

Verdict: Bot · AI can build you a working versionBuild time: one sitting
Bot

01What it costs

$19.95/moPremium, monthly
$239.4per year at that price

Checked Aug 12, 2026 · source: quillbot.com.

PlanMonthlyBilled yearlyWhat you get
FreeFreeFree125 words/paraphrase; 1,200 words/summarization input; 20 AI Chat queries/day; 10 AI-detector scans/day up to 1,200 words; 3 image generations/day; 10 MB Flow storage.
Premium$19.95$8.33/moUnlimited paraphraser, AI Chat, and AI-detector use; 6,000 words/summarization input; 25,000 plagiarism words/month; 300 images/month; 100 MB Flow storage.
Team 2-10 seats—$8.65/mo2-10 seats; all Premium features; writer-management dashboard; centralized billing.
Team 11-50 seats—$7.69/mo11-50 seats; all Premium features; writer-management dashboard; centralized billing.
Team 51+ seats—$6.73/mo51+ seats; all Premium features; writer-management dashboard; centralized billing.

Hidden costs: Premium's 25,000 monthly plagiarism words do not roll over. Extra packs cost $2.45 for 6,250 words, $8.95 for 25,000, or $19.95 for 62,500; purchased packs roll over until used.

02Could AI build it for you?

The core job: Create text boxes for paraphrase/summarize/grammar, call an LLM and LanguageTool, and save/export outputs.

What a working version needs:

  • LLM API
  • LanguageTool or grammar API
  • browser extension if in-app writing is needed

Great yes candidate: wrapper-heavy, high willingness to cancel.

03What you'd give up

  • browser/Word extensions
  • plagiarism/AI detector workflows
  • rewrite modes
  • history
  • polish
  • account sync

They pay because it is available where they write and has purpose-built controls.

04Free and cheaper alternatives

Apple Writing Toolsfree

Proofread, rewrite, shorten, or change tone almost anywhere, assuming your Apple hardware made the guest list.

Versus paying: It covers basic proofreading and rewriting, but lacks QuillBot's dedicated paraphrase modes, synonym controls, citation tools, and broad cross-platform availability.

support.apple.com →
Page Assistopen-source

A browser sidebar that reads the page, rewrites the selection, and saves custom actions; your local model does the thinking.

Versus paying: It can paraphrase with a local model, but it lacks QuillBot's predictable modes, sentence-level controls, grammar suite, and citation workflow.

pageassist.xyz →
Witsyopen-source

System-wide selected-text commands, reusable experts, a scratchpad, and document context; bring the model and skip the subscription.

Versus paying: It can run rewrite commands anywhere, but results depend on prompts and models rather than QuillBot's purpose-built paraphrase controls and writing-tool suite.

witsyai.com →
Writing Toolsopen-source

Select text anywhere, hit a hotkey, and fix, rewrite, summarize, or obey a custom instruction without opening another tab.

Versus paying: It handles selected-text rewrites well, but lacks QuillBot's structured paraphrasing modes, synonym controls, citation generator, and integrated editor.

github.com →

05The build prompt

Paste this into an AI coding tool (such as Claude, ChatGPT, Lovable or Replit) to build your own version.

prompt.txt
Build me a local paraphrasing and grammar tool to replace QuillBot. Requirements:

- A local web page on localhost:5170: Node + Express, one textarea in, one output pane,
  buttons for Paraphrase, Summarize, Fix grammar, and a tone select (standard, formal,
  casual, shorter).
- Paraphrase, summarize, and tone modes call an LLM (Anthropic or OpenAI key in .env)
  with a fixed prompt per mode; stream the output.
- Grammar mode calls a local LanguageTool server and lists each issue with its suggested
  fix, click to apply. No LLM needed for grammar.
- A diff view between input and output with word-level highlights (the `diff` npm
  package).
- Every run saved to SQLite via better-sqlite3: timestamp, mode, input, output. A
  history page lists the last 100 with copy buttons.
- Cmd+Enter runs the selected mode.
- No accounts, no telemetry; text leaves my machine only for LLM calls, grammar checking
  stays fully local.
- Out of scope: browser and Word extensions, plagiarism and AI detection. This lives in
  one tab.
- README: LanguageTool setup (needs Java or Docker) and which API key to add.

06Open-source starting points

  • LanguageTool: Open-source grammar/style checking engine useful for a QuillBot-lite clone.
Sponsor slot · openFeatured alternative to QuillBot. A labeled card for one relevant tool.
Book this spot →

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App prices, verdicts, alternatives and build prompts are adapted from Can I Vibecode It? (MIT License, © 2026 Rob Hallam). Each price shows the date it was checked and its source. Prices change; confirm on the vendor's site before you decide.