Head to head · September 2026 cycle
Penlify vs SupWriter
SupWriter finished 36.2 points ahead of Penlify in the September 2026 cycle, 72.80 to 36.57, ranking #5 against #14 in a field of 14. SupWriter scored higher on 5 of 5 detectors and 6 of 7 writing categories. Penlify came out ahead on consistency across categories (100.0 vs 64.7), readability (71.8 vs 45.7) and business email prompts (39.9 vs 38.7).
- Detectors
- 0 – 5
- Categories
- 1 – 6
- Components
- 2 – 3
Score components
What the overall score is made of: bypass rate weighs 42%, meaning preservation 32%, readability 16%, consistency across categories 10%. Output-quality penalties come off the total. How scoring works →
Detector by detector
Share of each tool's outputs that a detector classified as human-written. SupWriter took 5 of 5.
Writing categories
Category score per writing context: bypass credit only for real rewrites, blended with the category's own meaning preservation and readability. Small categories swing; the prompt count is shown on each row. How category scores work →
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
Penlify
3 wins- Consistency Score 100.0 vs 64.7
- Readability Score 71.8 vs 45.7
- Business Email Category 39.9 vs 38.7
SupWriter
14 wins- Bypass rate Score 80.3 vs 0.0
- Penalties Score None vs −5.0
- Meaning preservation Score 79.0 vs 62.7
- Copyleaks Detector 85.3 vs 0.0
- Winston AI Detector 81.5 vs 0.4
- Originality.ai Detector 78.5 vs 0.0
- ZeroGPT Detector 77.9 vs 43.0
- GPTZero Detector 21.0 vs 0.0
- Academic Essay Category 79.7 vs 27.0
- Discussion Board Category 78.0 vs 32.1
- and 4 more
Questions people ask
Is Penlify better than SupWriter?
SupWriter finished 36.2 points ahead of Penlify in the September 2026 cycle, 72.80 to 36.57, ranking #5 against #14 in a field of 14. SupWriter scored higher on 5 of 5 detectors and 6 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 5 detectors, under methodology v1.2.0; every input, output and verdict is published.
Which bypasses AI detectors better, Penlify or SupWriter?
SupWriter posted the higher bypass rate, 80.3 vs 0.0, and scored higher on 5 of 5 detectors. SupWriter led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT.
Do Penlify and SupWriter keep the original meaning?
SupWriter preserved meaning better, 79.0 vs 62.7 on our 0–100 similarity scale. On readability, Penlify rated higher, 71.8 vs 45.7. Penalties this cycle: Penlify −5.0, SupWriter None.