Head to head · September 2026 cycle
Phrasly vs SupWriter
SupWriter finished 5.2 points ahead of Phrasly in the September 2026 cycle, 72.80 to 67.58, ranking #5 against #8 in a field of 14. SupWriter scored higher on 3 of 5 detectors and 5 of 7 writing categories. Phrasly came out ahead on GPTZero (81.4 vs 21.0), readability (65.4 vs 45.7) and business email prompts (51.7 vs 38.7). The bypass-rate gap, 82.1 to 80.3, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 2 – 3
- Categories
- 2 – 5
- Components
- 3 – 2
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 →
CIs overlap marks a gap that sits inside both tools' published 95% confidence intervals for that component; it may not survive another cycle.
Detector by detector
Share of each tool's outputs that a detector classified as human-written. SupWriter took 3 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.
Phrasly
7 wins- Readability Score 65.4 vs 45.7
- Consistency Score 75.0 vs 64.7
- Bypass rate Score 82.1 vs 80.3
- GPTZero Detector 81.4 vs 21.0
- Originality.ai Detector 83.4 vs 78.5
- Business Email Category 51.7 vs 38.7
- Application Essay Category 78.1 vs 67.1
SupWriter
10 wins- Penalties Score None vs −6.0
- Meaning preservation Score 79.0 vs 66.1
- Winston AI Detector 81.5 vs 61.6
- ZeroGPT Detector 77.9 vs 68.0
- Copyleaks Detector 85.3 vs 81.8
- Blog Post Category 78.4 vs 57.7
- Marketing Copy Category 81.3 vs 61.5
- Discussion Board Category 78.0 vs 60.6
- Academic Essay Category 79.7 vs 64.5
- News Article Category 81.1 vs 78.3
Questions people ask
Is Phrasly better than SupWriter?
SupWriter finished 5.2 points ahead of Phrasly in the September 2026 cycle, 72.80 to 67.58, ranking #5 against #8 in a field of 14. SupWriter scored higher on 3 of 5 detectors and 5 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, Phrasly or SupWriter?
Phrasly posted the higher bypass rate, 82.1 vs 80.3, and scored higher on 2 of 5 detectors. Phrasly led on GPTZero and Originality.ai; SupWriter led on Copyleaks, Winston AI and ZeroGPT. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do Phrasly and SupWriter keep the original meaning?
SupWriter preserved meaning better, 79.0 vs 66.1 on our 0–100 similarity scale. On readability, Phrasly rated higher, 65.4 vs 45.7. Penalties this cycle: Phrasly −6.0, SupWriter None.