Penlify
Penlify ranked #14 of 14 in the September 2026 cycle with an overall score of 36.57/100, after losing 5 points to penalties for meaning drift. ZeroGPT passed its output most often (43.1%), and GPTZero, Copyleaks and Originality.ai passed it least often (0.0% each). It did best on business emails and worst on academic essays.
Penlify is a standalone AI humanizer with a built-in AI detector that scores text overall and by sentence. It has six tones and three rewrite strengths, and supports English plus French, Spanish, German, Italian, Portuguese and Dutch. The free plan allows five rewrites and three AI detections a month, on approximately 6,000 characters of text.
- Overall score
- 36.57/100
- Detector bypass
- 0.0%
- Overall rank
- #14of 14
- Prompts tested
- 33
Detector Bypass Rates
Each detector's average human-likelihood score on this tool's outputs, where 100 means every output was scored as human.
Performance by Category
Category score across writing contexts: bypass credit only for real rewrites, blended with each category's meaning and readability. How it's computed
Strengths
- Readability of 71.8, the highest this cycle (field median 59.4)
Weaknesses
- Bypass rate of 0.0%, the lowest this cycle (field median 80.9%)
- Lost 5 points to penalties for meaning drift
- GPTZero, Copyleaks and Originality.ai classified only 0.0% of its runs as human-written
From the September 2026 cycle, compared with the other 13 tools ranked in that cycle.
Evidence: every run
Every prompt Penlify was run on in September 2026, and how each of the 5 detectors scored the output. Green: the detector called it human-written. Red: it was caught.
0 of 33 outputs passed all 5 detectors; 32 were caught by at least one, 1 run returned nothing scoreable. 32/33 runs completed.
| Prompt | GPT GPTZero | Win Winston AI | Zero ZeroGPT | Copy Copyleaks | Orig Originality.ai | Median | Recording |
|---|---|---|---|---|---|---|---|
| Argumentative Essay · GPT-5.5 | caught | caught | passed | caught | caught | 0.00 | |
| Discussion Post · Gemini 3.5 Flash | caught | caught | passed | caught | caught | 0.00 | |
| Personal Statement · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Discussion Post · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| News Article · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Product Desc · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Cover Letter · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Personal Statement · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Business Email · Gemini 3.5 Flash | caught | caught | passed | caught | caught | 0.00 | |
| Lit Review · Gemini 3.5 Flash | caught | caught | passed | caught | caught | 0.00 | |
| Discussion Post · GPT-5.5 | caught | caught | passed | caught | caught | 0.00 | |
| Argumentative Essay · Gemini 3.5 Flash | caught | caught | passed | caught | caught | 0.00 | |
| Landing Copy · Gemini 3.5 Flash | caught | caught | passed | caught | caught | 0.00 | |
| Argumentative Essay · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Lit Review · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Howto Blog · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Product Desc · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| Lit Review · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Personal Statement · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| Landing Copy · GPT-5.5 | caught | caught | passed | caught | caught | 0.00 | |
| Cover Letter · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| Cover Letter · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Landing Copy · Claude Sonnet 5 | caught | caught | passed | caught | caught | 0.00 | |
| News Article · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| Listicle Blog · GPT-5.5 | Tool unavailable | n/a | |||||
| Business Email · GPT-5.5 | caught | caught | passed | caught | caught | 0.00 | |
| Listicle Blog · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| Product Desc · GPT-5.5 | caught | caught | caught | caught | caught | 0.00 | |
| Listicle Blog · Claude Sonnet 5 | caught | caught | passed | caught | caught | 0.00 | |
| Howto Blog · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Business Email · Claude Sonnet 5 | caught | caught | passed | caught | caught | 0.00 | |
| Howto Blog · Gemini 3.5 Flash | caught | caught | caught | caught | caught | 0.00 | |
| News Article · Claude Sonnet 5 | caught | caught | caught | caught | caught | 0.00 | |
| Detector rate (mean human-likelihood) | 0.0 hardest | 0.4 | 43.0 | 0.0 | 0.0 | ||
| Runs passed | 0/32 | 0/32 | 12/32 | 0/32 | 0/32 | ||
A dot is green when the detector's human-likelihood score for that run was 0.50 or higher. The detector rate is the mean of that detector's scores across the runs, the same number the detector pages rank by; it is not the count of green dots, which the Runs passed row shows. Hover a dot for the score.
How to read these scores
Each detector returns a human-likelihood on a common 0 to 1 scale, where 1 means it judged the text human-written and 0 means it flagged it as AI. On these pages a verdict counts as passed when that score is at least 0.50, the midpoint of the detector's own scale. That threshold exists only to draw the chips: the bypass rate on the leaderboard is the mean of each test's median score across the 5 detectors, a continuous number, so a tool's pass count and its bypass rate will not be the same figure.
History
Overall score compared with other ranked tools.
33.5 points below the median of 13 other tools in September 2026.
The shaded band is the 25th–75th percentile of other tools in each cycle. Scores are out of 100; higher is better. One completed cycle so far.
Monthly pricing
Standard USD rates, billed month to month. Annual discounts and promotions excluded.
-
Pro Monthly
$2.99/moUnlimited rewrites and AI detections.
- Up to 12,000 characters per rewrite.
Free access and trials
The free plan includes 5 rewrites and 3 AI detections per month. The provider describes an approximate 6,000-character free limit.
Sample output
One AI-written passage from the September 2026 cycle and what Penlify returned for it. This prompt was picked by a fixed rule, not by how the tool scored.
AI-written input
Every tool on this prompt →Howto Blog · Blog Post · written by Gemini 3.5 Flash · 454 words
**The Weekend Warrior’s Guide to a Small Bathroom Renovation**
Renovating a small bathroom doesn’t require weeks of chaos. With a tight plan, a clear budget, and 48 hours of focused effort, you can transform your compact space from dated to dazzling. Here is your step-by-step weekend battle plan.
### **The Prep Work (Do This Before Friday)** Success lies in preparation. Order all materials—paint, fixtures, vanity, and hardware—weeks in advance. Ensure everything is delivered and undamaged. Gather your tools: a drill, adjustable wrench, caulk gun, painter’s tape, and safety gear.
---
### **Saturday: Demo and Base Layers**
* **Morning: Out with the Old (8:00 AM – 12:00 PM)** Shut off the water valves. Remove the old mirror, hardware, and vanity. If you are replacing the toilet, drain it completely, unscrew the floor bolts, and lift it out. Seal the open drain pipe with a rag to block sewer gases. Bag all trash immediately to keep your workspace clear. * **Afternoon: Prep and Paint (1:00 PM – 5:00 PM)** Patch any drywall holes with quick-dry spackle, sand them smooth, and wipe the walls clean. Apply painter's tape to the trim. In a small bathroom, a fresh coat of moisture-resistant, semi-gloss paint in a light color (like soft white or pale gray) will instantly make the room feel double its size. Apply the first coat, wait two hours, and apply the second. * **Evening: Install the Vanity (6:00 PM – 9:00 PM)** Assemble your new vanity. Position it against the wall, ensure it is level, and secure it to the wall studs. Install the new faucet onto the vanity sink *before* mounting the sink to the cabinet—it is much easier than doing it from underneath. Secure the sink top with silicone caulk.
---
### **Sunday: Plumbing and Styling**
* **Morning: Connections and Throne (9:00 AM – 1:00 PM)** Hook up the vanity water lines and drain trap. Next, install your new toilet (or reinstall the old one) using a fresh wax ring. Tighten the bolts gently to avoid cracking the porcelain. Turn the water main back on and check all connections carefully for leaks. * **Afternoon: The Details (2:00 PM – 6:00 PM)** Hang your new mirror—ideally a large one to bounce light around the room. Replace dated light fixtures (turn off the breaker first!). Swap out old towel bars, toilet paper holders, and cabinet pulls for cohesive, modern hardware (matte black or brushed brass work wonders). * **Evening: Clean and Style** Scrape away old tub caulk and apply a fresh, clean bead of silicone. Lay down a plush bath mat, hang fresh towels, and add a small plant.
By Sunday night, your cramped, outdated bathroom will be a stylish, functional oasis—all completed in just one weekend.
Show the full input Show less
Penlify output
445 words (input 454)
**The Weekend Warrior's Guide to a Small Bathroom Renovation**
A full‑blown remodel can take weeks, but a tiny bathroom can get a makeover in a single weekend if you lock in a plan, set a budget and carve out 48 focused hours. By Sunday night the old, cramped room can feel surprisingly roomy and fresh.
**Prep (do it before Friday)** Order paint, fixtures, a vanity and all the little bits weeks ahead. Make sure everything arrives in one go and isn't cracked. Pull together a drill, an adjustable wrench, a caulk gun, painter's tape and a pair of gloves, nothing else you'll need.
**Saturday, morning, ripping out the old (8 AM‑12 PM)** Turn off the water valves first. Take down the mirror, the hardware and the old vanity. If the toilet's getting replaced, flush it empty, undo the floor bolts and lift it away. Toss a rag over the open drain pipe so sewer gases stay out. Bag the junk as you go so the floor stays clear.
**Saturday, afternoon, patch and paint (1 PM‑5 PM)** Fill any drywall holes with quick‑dry spackle, sand smooth and wipe the walls. Stick painter's tape along the trim. In a small bathroom a light‑colored, moisture‑resistant semi‑gloss paint does wonders, think soft white or pale gray. Roll on the first coat, wait a couple of hours, then go back for a second.
**Saturday, evening, vanity time (6 PM‑9 PM)** Put the new vanity together, press it up against the wall and make sure it sits level. Screw it into the studs. Hook the faucet onto the sink before you mount the sink to the cabinet, much easier than reaching under later. Seal the sink top with a bead of silicone.
**Sunday, morning, plumbing and throne (9 AM‑1 PM)** Connect the vanity's water lines and drain trap. Slip the new toilet (or the old one) into place with a fresh wax ring, tighten the bolts just enough not to crack the porcelain. Turn the main water back on and watch for any drips.
**Sunday, afternoon, the details (2 PM‑6 PM)** Hang a large mirror so light bounces around. Swap out dated light fixtures, remember to shut the breaker first. Replace towel bars, toilet‑paper holders and cabinet pulls with something modern; matte black or brushed brass look great.
**Sunday, evening, clean up and style** Scrape away the old tub caulk, then lay a smooth line of fresh silicone. Roll out a plush bath mat, drape fresh towels and put a small plant on the sill for a splash of life.
And just like that, by the time the weekend ends, your once‑cramped bathroom has turned into a tidy, functional little oasis.
Show the full output Show less
- GPTZero0.00caught
- Winston AI0.03caught
- ZeroGPT0.41caught
- Copyleaks0.00caught
- Originality.ai0.00caught
Passed 0 of 5 detectors.
Every Penlify run in September 2026 →Each chip is one detector's score for that output, from 0 (AI) to 1 (human). A score of 0.50 or higher counts as a pass and shows green; below that the detector caught it and the chip shows red.
Penalties applied this cycle
How penalties work →The overall score shown above already reflects these deductions.
- Meaning drift ×5−5.0
The output's meaning drifted significantly from the original input.
Compare with
Questions about Penlify
Answers are generated from the benchmark data and update every month. Last updated with the October 2026 cycle.
Is Penlify good?
Penlify ranked #14 of 14 in the September 2026 HumanizerBench cycle with an overall score of 36.57/100, below the field median of 68.82. On the parts of the score, it placed #14 of 14 on detector bypass, #12 of 14 on meaning preservation and #1 of 14 on readability. The score includes a 5-point deduction for meaning drift.
Does Penlify bypass AI detectors?
In the September 2026 cycle, Penlify had a detector bypass rate of 0.0% (#14 of 14 tools). 0 of its 33 outputs passed all 5 detectors, and 32 were caught by at least one. Its average human-likelihood score from each detector, where 100 means every output was scored as human: ZeroGPT 43.1, Winston AI 0.4, Originality.ai 0.0, GPTZero 0.0 and Copyleaks 0.0.
Can Penlify bypass GPTZero?
In the September 2026 cycle, Penlify's average human-likelihood score from GPTZero was 0.0 out of 100 (#14 of 14 tools against GPTZero). The highest average GPTZero score that cycle was 81.4, by Phrasly. See every tool's GPTZero results.
Is Penlify free?
The free plan includes 5 rewrites and 3 AI detections per month. The provider describes an approximate 6,000-character free limit. Paid plans start at $2.99 a month, billed monthly.
Is Penlify legit?
Penlify is a working AI humanizer at penlify.app. HumanizerBench tested it in the September 2026 cycle, when it completed 32 of 33 test runs. Every input and output from its runs is published with each detector's verdict.
Does Penlify keep the original meaning?
Penlify scored 62.7 out of 100 for meaning preservation in the September 2026 cycle (#12 of 14; field median 73.7). The score measures how close each rewrite stays to the meaning of the original text. Its readability score was 71.8 (#1 of 14). It lost 5 points to penalties for meaning drift.
Which kinds of writing does Penlify handle best?
In the September 2026 cycle, Penlify did best on business emails (39.9/100) and worst on academic essays (27.0/100). On academic essays it ranked #14 of 14.
What are the best alternatives to Penlify?
Penlify was not ranked in the October 2026 cycle. The top three that cycle were WriteHuman (#1, 74.89/100), StealthGPT (#2, 74.50/100) and Undetectable.ai (#3, 71.18/100).