Penlify
Penlify is an AI humanizer independently benchmarked by HumanizerBench. It ranked #14 of 14 in the September 2026 cycle with an overall score of 36.57/100, our composite measure of how reliably it evades AI detectors while preserving the original meaning and readability.
Detector Bypass Rates
Percentage of runs classified as human-written by each detector.
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
12-Month Trend
Overall score across the past year of testing cycles.
Session recordings
See the full methodology →Screen captures from the benchmark runs, kept for auditability. Hosted links may expire over time; the JSON in this repo is the source of truth.
Test markers
- 0:36penlify · application_essay · personal_statement
- 1:52penlify · blog_post · listicle_blog
- 2:50penlify · marketing_copy · product_desc
- 3:17penlify · marketing_copy · landing_copy
- 3:53penlify · marketing_copy · landing_copy
- 4:30penlify · application_essay · cover_letter
- 5:32penlify · blog_post · howto_blog
- 6:16penlify · discussion_board · discussion_post
- 6:55penlify · marketing_copy · product_desc
- 7:30penlify · business_email · business_email
- 8:11penlify · academic_essay · lit_review
- 9:45penlify · academic_essay · argumentative_essay
- 11:01penlify · academic_essay · lit_review
- 11:29penlify · application_essay · personal_statement
- 12:07penlify · business_email · business_email
- 12:27penlify · blog_post · listicle_blog
- 13:21penlify · blog_post · listicle_blog
- 13:53penlify · application_essay · personal_statement
- 14:12penlify · news_article · news_article
- 14:37penlify · academic_essay · argumentative_essay
- 14:52penlify · application_essay · cover_letter
- 15:33penlify · blog_post · howto_blog
- 15:47penlify · news_article · news_article
- 16:04penlify · news_article · news_article
- 16:26penlify · discussion_board · discussion_post
- 16:50penlify · discussion_board · discussion_post
- 17:12penlify · academic_essay · argumentative_essay
- 17:38penlify · business_email · business_email
- 18:46penlify · marketing_copy · landing_copy
- 19:29penlify · marketing_copy · product_desc
- 19:44penlify · blog_post · howto_blog
- 20:05penlify · academic_essay · lit_review
- 20:22penlify · application_essay · cover_letter
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.
Minimum monthly pricing
- Monthly
- $2.99/mo
- Free tier
- Yes
How we tested
33 prompts across 7 writing categories, scored by 5 independent AI detectors. Every score is reproducible from the public methodology.
Evidence
In the September 2026 cycle we ran Penlify on 33 prompts and collected 160 detector verdicts on the outputs. 0 of those outputs were scored by all 5 detectors and called human-written by every one of them, and 32 were caught by at least one, 1 run returned nothing scoreable. That is a stricter, all-or-nothing reading of the same verdicts the 0.0% bypass rate above averages: every input, output and score is published, so you can check it yourself.
Read all 33 Penlify outputs →Compare with
Featured in
Badges
Penlify is ranked in the September 2026 cycle, so it can embed any of these cards for free, and the live file re-renders every cycle, including when a rank falls. Usage rules →
Pinning a month for a press page? Use https://humanizerbench.com/badge/penlify/september-2026.svg, which renders September 2026 forever.