Penshift is one workbench, seven tools. A humaniser that keeps your voice, nine paraphrase modes, an AI detector, plagiarism scan, grammar fix, summariser, translator across 13 languages. One login covers all of it. Honestly cheaper than QuillBot Premium. The rewrites land sharper than Grammarly.
Paraphraser, humaniser, AI detector, plagiarism checker, grammar fixer, summariser, translator. Penshift puts the lot under one sign-in with a single word quota. No tab-juggling, no separate subscriptions for what is basically the same job.
Penshift rewrites AI-flavoured drafts into prose that reads like a person wrote it. The obvious tells go: marketing vocabulary, uniform sentence rhythm, em-dashes, the three-in-a-row parallel structures every model loves. Paste a writing sample and the rewrite mirrors your voice. Detector results vary by tool. We don't promise to beat any specific one.
Standard, Fluency, Formal, Academic, Simple, Creative, Expand, Shorten, Custom. Pick the voice the moment matters.
Score any text 0–100% AI with a per-pattern breakdown and plain-English reasoning. No quota burn.
Match against the public web. Per-source overlap, flagged spans, clickable references. Penshift gives you the receipts, not just one number.
Fixes typos, agreement, punctuation. Your style stays. UK or US spelling stays as you wrote it.
Condense long-form to its essential claims. Every fact, number, and name preserved. Output is prose, not bullets.
English, Spanish, French, German, Italian, Portuguese, Dutch, Hindi, Mandarin, Japanese, Korean, Arabic, Russian.
The Penshift Chrome extension brings the workbench into Gmail, Google Docs, LinkedIn, Notion, and any other site you write on. Right-click a selection to humanise, paraphrase, or score it. No copy-pasting back to the app.
Right-click any selection on Gmail, LinkedIn, Notion, or Google Docs and Penshift rewrites it in your voice. No leaving the tab.
Run the AI Detector on any draft straight from the page. See if your message reads as AI before it lands.
Sign in once, the extension uses the same quotas as the web app. Free tier works in the extension too.
How Penshift stacks up against QuillBot and Grammarly Premium feature by feature. Last verified: April 2026.
| Feature | Penshift | QuillBot | Grammarly |
|---|---|---|---|
Paraphrase modes Distinct rewrite voices | 9 modes | 7 modes | |
AI Humanizer Dedicated human-voice rewrite tool | Add-on | ||
AI Detector Score 0–100% with reasoning | |||
Plagiarism Checker Web-source matching with snippets | |||
Grammar Check Mechanics-only, voice preserved | |||
Summarizer Condense long-form to essentials | |||
Translator Faithful, register-matched | 13 languages | 8 languages | |
Voice matching from sample Mirror your own writing style | |||
Chrome extension Right-click any text to rewrite inline | |||
Custom mode Bring your own rewrite instructions | |||
Free tier word allowance Rewrite tools | 5,000 / month | 125 / paraphrase | Basic only |
Pro plan price Annual billing · per month | $7.99 / mo | $9.95 / mo | $12 / mo |
QuillBot is a trademark of Course Hero, Inc. Grammarly is a trademark of Grammarly, Inc. Penshift is not affiliated with, endorsed by, or sponsored by either company. Pricing and feature claims reflect publicly listed information at the “last verified” date above and may change without notice.
Essay, blog post, email, LinkedIn post, cover letter. Up to 3,500 words at a time.
One pass through Penshift. The rewrite strips AI patterns and preserves every claim. Paste a writing sample alongside and the output mirrors your rhythm.
Your words, just humanised. Switch to the AI Detector any time to score what you've got. Plagiarism stays clean and Penshift won't fabricate citations.
Drafting blog posts and product copy with AI is fast. Sounding human is the hard part. Penshift humanises GPT-shaped writing and scores it against detectors before you publish. No more 80%-AI flags from Google's quality team.
Paraphrase research notes in your own voice, score your essay against AI detectors before you submit, then check for accidental plagiarism. Penshift isn't a cheating tool. It's a tool for catching the things your professor will catch first.
Fluency mode smooths awkward phrasing without flattening your voice. Translate keeps register and names intact across 13 languages. Grammar Check fixes mechanics without rewriting your style.
Write LinkedIn posts in Custom mode, summarise long reports for your team, translate landing copy for new markets, then run AI Detector before launch. One workbench instead of five subscriptions.
Four tiers, no usage tricks, no annual lock-in. Free forever for casual writers; verified students get 20% off Pro pricing; Pro at $7.99/mo annual gives you unlimited paraphrasing, humanising, grammar, summaries, translation, and AI detection, plus 25,000 words/month plagiarism.
Penshift includes a dedicated AI Humanizer tuned for detector evasion. QuillBot does not (its paraphraser is one mode). Penshift also gives you voice matching from a writing sample, a Custom mode where you bring your own rewrite instructions, and 13-language translation. Penshift Pro is $7.99/month annual ($14.99 monthly) versus QuillBot Premium at $9.95/month annual ($19.95 monthly). QuillBot has the older brand and a Word add-in. Penshift is sharper on humanising, cheaper, and built around a single workbench instead of separate tools.
We don't claim perfect. Penshift is the best on the market at one specific thing: rewriting in your own voice. Paste a draft and see for yourself.
No card · 5,000 words/month free · cancel anytime