WriteHuman, a better alternative to Grammarly
WriteHuman vs Grammarly: real-world performance
HumanizerBench is a public benchmark that re-tests every major AI humanizer each month. Each tool is paid for and run by hand on the same prompts, then scored against 5 major AI detectors on how human the output reads, how well it keeps the original meaning, and how cleanly it's written. Every prompt, output, and detector score is published.
Tested June 202630 samples390 tests5 AI detectors
| Metric | WriteHuman | Grammarly |
|---|---|---|
Overall score Composite out of 100. Weights AI-detector results 42%, meaning 32%, readability 16%, and consistency 10%, then subtracts quality penalties. | 83.59 | 56.50 |
AI-detector pass rate Share of checks where the output read as human-written, across all 5 AI detectors. | 84.5% | 0.0% |
AI-detector pass rate, by detector Share of checks on each detector where WriteHuman's output read as human-written. Showing detectors where WriteHuman scores higher. | ||
GPTZero | 78.2% | 0.0% |
Winston AI | 84.5% | 0.1% |
ZeroGPT | 74.3% | 5.5% |
Copyleaks | 68.7% | 0.0% |
Originality.ai | 46.3% | 0.0% |
Score by content type Benchmark score by writing category. Showing categories where WriteHuman scores higher. | ||
Blog posts | 87.6% | 0.0% |
News articles | 93.0% | 0.0% |
Marketing copy | 75.7% | 0.0% |
Discussion posts | 97.4% | 0.0% |
Scoring methodology ↗See the full head-to-head on HumanizerBench ↗
WriteHuman vs Grammarly in 60 seconds
The headline differences. Detailed analysis below.
- Starting price
- $18/mo Basic
- Free tier
- Free to use, no signup, no card
- Standout
- Scored 83.59 in the June 2026 HumanizerBench cycle with zero quality penalties, ahead of Grammarly on every AI detector, on its entry-level Basic plan
- Starting price
- Pro $30/mo
- Free tier
- Free: 100 AI prompts/mo
- Watch for
- A grammar, spelling, and tone checker, not a humanizer
Bottom line: For humanizing AI-assisted writing, Grammarly is the wrong tool: it cleans up grammar but leaves the patterns detectors flag. WriteHuman is built for that job and led it in the June 2026 benchmark, an 84.5% AI-detector pass rate to Grammarly's 0%.
Two different jobs
Grammarly is a grammar checker, not a humanizer
Grammarly is a grammar, spelling, and tone checker, and a capable one. It edits the surface of your writing, fixing punctuation, word choice, and phrasing. In the June 2026 HumanizerBench cycle it barely changed the input, so it kept the meaning intact but did not move the patterns AI detectors actually read.
That is the core mismatch. Making an AI-assisted draft read as human-written is a different job from cleaning up grammar, and Grammarly is not built for it. In the same cycle WriteHuman scored 83.59 on the overall composite to Grammarly's 56.50.
WriteHuman's composite score in the same cycle.
Detector results
Polished writing that still reads as AI to every detector
In the June 2026 benchmark, Grammarly's rewrites scored a 0% AI-detector pass rate across the panel: GPTZero 0%, Winston AI roughly 0%, Copyleaks 0%, Originality.ai 0%, and ZeroGPT about 5%. It scored near 0% on all four content categories too. Polishing grammar does not change what a detector reads.
WriteHuman posted an 84.5% AI-detector pass rate over the same cycle and led on all four content categories. The built-in AI detector lives in the same view as the humanizer and is tuned to closely match GPTZero, Originality.ai, Copyleaks, ZeroGPT, and Winston AI, so you can see roughly where a passage will land before you publish it.
Grammarly's rewrites scored 0% on AI-detector pass rate across the detector panel.
WriteHuman posted an 84.5% AI-detector pass rate and led on all four content categories.
The WriteHuman difference
How WriteHuman makes AI writing read human
WriteHuman rewrites at the structural level: sentence rhythm, burstiness, transitions, and idiom all shift, while your vocabulary, citations, and quotes stay intact and the word count stays close to the original. That is the change that actually moves how a detector scores a passage.
You can run it free on writehuman.ai with no signup, no email, and no card. Every paid plan adds the built-in AI detector in the same view, so you check the score before you publish. Plans are $18/mo Basic, $27/mo Pro, and $48/mo Ultra, across 50+ languages, with a public REST API and two-click cancellation.
Grammarly edits punctuation and word choice, leaving the structure that detectors read intact.
WriteHuman shifts sentence rhythm and structure, which is what AI detectors actually read.
Pricing: WriteHuman vs Grammarly
Side-by-side plans. WriteHuman's free tier is on the homepage. No signup needed.
Free
$0
Try the humanizer with daily limits, no signup
- No credit card
- Daily request cap
- Built-in AI detector access
Basic
$18/mo
80 humanizations / month, up to 600 words each
- 2 output variations
- 160 AI detector checks / mo
- Cancel anytime
Pro
$27/mo
200 humanizations / month, up to 1,200 words each
- 3 output variations
- 400 AI detector checks / mo
- Priority support
Ultra
$48/mo
Unlimited humanizations, up to 3,000 words each
- 5 output variations
- Unlimited AI detector checks
- Priority support
Free
$0
100 AI prompts/mo, grammar and tone checks
Pro
$30/mo
2,000 AI prompts/mo, rewrites and tone tools
Enterprise
Custom
Unlimited prompts, admin controls and security
Pricing verified as of . For the latest Grammarly pricing, see grammarly.com.
Feature Comparison
See how WriteHuman stacks up against Grammarly, feature by feature.
What real Grammarly users are saying
Quotes pulled from public reviews on Reddit, Trustpilot, G2, and Product Hunt.
“Sometimes the suggestions overcorrect or miss nuance in tone/brand voice even with custom setups, making AI rewrites sound a bit generic or off.”
“Very large documents cause the service to lag considerably.”
“There are a lot of words which I spell incorrectly and Grammarly doesn't know what I am trying to spell so it doesn't have any suggestions.”
Why writers pick WriteHuman
The everyday reasons writers switch to WriteHuman from Grammarly.
Pick WriteHuman if…
- An AI-assisted draft needs to read as human-written to GPTZero, Originality.ai, Copyleaks, ZeroGPT, or Winston AI.
- You want structural rewriting that shifts sentence rhythm and flow, not just a surface-level polish.
- You want to see roughly where a passage will score on the major detectors before you publish, in the same view.
- You work in one of 50+ languages and want consistent humanization across them.
- You want straightforward, self-serve pricing with two-click cancellation.
Pick Grammarly if…
- You want a grammar, spelling, and tone checker for everyday writing.
- You want real-time suggestions as you type across email, docs, and the browser.
- Your goal is to tighten writing you already consider human, not to change how a draft reads to a detector.
Why users switch from Grammarly
Real pain points Grammarly users run into, and how WriteHuman solves each one.
In the June 2026 benchmark, Grammarly's rewrites scored a 0% AI-detector pass rate across the detector panel.
WriteHuman posted an 84.5% AI-detector pass rate in the same cycle and led on all four content categories.
Grammarly works at the surface level (grammar, clarity, tone) and does not restructure prose, which is what detectors actually key on.
WriteHuman rewrites at the structural level (sentence rhythm, burstiness, transitions) while keeping vocabulary, citations, and quotes intact.
Its AI Humanizer cleans up phrasing but does not restructure sentences, so detectors still read its output as AI.
WriteHuman supports 50+ languages and is purpose-built to make AI-assisted drafts read as natural, human-written text.
On all four HumanizerBench content categories, Grammarly's pass rate stayed at roughly 0%.
WriteHuman scored 83.59 in the June 2026 HumanizerBench cycle with zero quality penalties, ahead of Grammarly on every AI detector.
Its rewrites barely change the input, so the AI patterns a detector reads stay in place.
WriteHuman pricing is plain and self-serve: $18 Basic, $27 Pro, $48 Ultra, with two-click cancellation from your account page.
Frequently asked: WriteHuman vs Grammarly
Is WriteHuman a good Grammarly alternative?
Why does Grammarly's output still read as AI to detectors?
Does Grammarly have an AI Humanizer, and how is it different from WriteHuman?
How much does each tool cost?
Can I use Grammarly and WriteHuman together?
Ready to make the switch?
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