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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | stealthwriter.ai | prowritingaid.com | Switch / compare |
|---|---|---|---|
| AI paraphrasing & rewriting | 87/100 TXT · Output attached | 86/100 JSON · Output attached | Active task |
| AI content detection | 96/100 JSON · Output attached | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | StealthWriter AI paraphrasing & rewriting 87/100 Seven-aspect task score StealthWriter AI Humanizer (Ghost 5.2 Mini) excelled on the 80-word benchmark, delivering 80.7% lexical diversity at Level 8 while preserving 100% of all 7 key facts, amounts, and verification token without hallucination. Cloud inference completed in 4.03s with comparison and one-click copy. Tested export TXT · Output attached Historical test · 2026-11-04 | ProWritingAid AI paraphrasing & rewriting 86/100 Seven-aspect task score ProWritingAid, a renowned writing companion in professional publishing and fiction writing, delivers robust sentence restructuring and flawless factual fidelity via its Rephrase feature. Against our 80-word benchmark sample, the cloud API responded in 1.45 seconds with 3 candidate rewrites across 8 nuanced tones, preserving 100% of critical numbers ($1,250,000) and verification token REALTEST-PARAPHRASE-VERIFIED-2026. Offering an anonymous daily quota of 10 rephrases without intrusive ads, it demonstrates commendable engineering discipline. Tested export JSON · Output attached Historical test · 2026-11-03 |
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| Pricing & rules | ||
| Pricing plans | StealthWriter Free, Starter, Plus, Pro, Business, and Scale subscription pricing plans · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-31 ↗ Free Free Free 10 humanizations/day, 10 AI scans/day, 1,000 words per input, Ghost 5.2 Mini included Basic AI detection and humanization Starter (Monthly)2026-10-31 ↗ USD 20/month — Monthly 50 humanizations/day, 50 AI scans/day, 5,000 words per input, Ghost 5.2 Pro and Legacy included Ghost 5.2 Pro advanced humanization and deep AI scan Starter (Annual)2026-10-31 ↗ — USD 200/year Annual Billed annually at $200.00 ($16.67/mo equivalent), 50 humanizations/day, 50 AI scans/day Ghost 5.2 Pro advanced humanization and deep AI scan Plus (Monthly)2026-10-31 ↗ USD 50/month — Monthly 150 humanizations/day, 150 AI scans/day, 5,000 words per input, fastest response, priority support Full high-frequency AI detection and humanization Plus (Annual)2026-10-31 ↗ — USD 500/year Annual Billed annually at $500.00 ($41.67/mo equivalent), 150 humanizations/day, 150 AI scans/day Full high-frequency AI detection and humanization Pro (Monthly)2026-10-31 ↗ USD 100/month — Monthly 350 humanizations/day, 350 AI scans/day, 5,000 words per input, heavy daily usage High volume professional AI detection and humanization Pro (Annual)2026-10-31 ↗ — USD 1,000/year Annual Billed annually at $1000.00 ($83.33/mo equivalent), 350 humanizations/day, 350 AI scans/day High volume professional AI detection and humanization 7 plan / billing-period records, all listed; — means that period is not recorded. Verified monthly rates: Starter $20/mo, Plus $50/mo, Pro $100/mo; annual plans explicitly show invoice totals: Starter $200/yr ($16.67/mo equiv), Plus $500/yr, Pro $1000/yr; Free tier provides 10 humanizations/day and 10 AI scans/day. Cancellation, sources & verification recordCancellation and refund terms unverified StealthWriter Official Pricing Page (Monthly) ↗ · 2026-10-31 Capture 1 ↗ StealthWriter Official Pricing Page (Annual) ↗ · 2026-10-31 Capture 1 ↗ | ProWritingAid Free, Premium, and Premium Pro recurring subscriptions and lifetime plans · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-31 ↗ Free Free Free 10 rephrases/day, 2 report runs/day (up to 500 words), basic grammar and spelling check Basic style analysis and grammar rephrasing Premium (Monthly)2026-10-31 ↗ USD 30/month — Monthly Unlimited rephrases, unlimited 25+ manuscript reports, 1 chapter critique/day, custom style guide Professional fiction style analysis and manuscript editing Premium (Annual)2026-10-31 ↗ — USD 120/year Annual Billed annually at $120.00 ($10.00/mo equivalent), unlimited rephrases and manuscript reports Professional fiction style analysis and manuscript editing Premium (Lifetime)2026-10-31 ↗ USD 399 · one-time payment Usage / one-time Usage / one-time One-time lifetime payment of $399.00 for permanent access to all Premium features Lifetime unlimited style analysis and editing Premium Pro (Monthly)2026-10-31 ↗ USD 36/month — Monthly All Premium features plus 30 chapter critiques/day, author community access, and live workshops Advanced fiction critique and master workshops Premium Pro (Annual)2026-10-31 ↗ — USD 144/year Annual Billed annually at $144.00 ($12.00/mo equivalent), 30 chapter critiques/day, community access Advanced fiction critique and master workshops Premium Pro (Lifetime)2026-10-31 ↗ USD 699 · one-time payment Usage / one-time Usage / one-time One-time lifetime payment of $699.00 for permanent access to all Premium Pro features Lifetime advanced critique and community access 7 plan / billing-period records, all listed; — means that period is not recorded. Verified pricing tabs clearly specify monthly rates ($30/mo, $36/mo), exact upfront annual totals ($120/yr at $10/mo equiv, $144/yr at $12/mo equiv), and lifetime single charges ($399, $699); Free tier includes 10 rephrases/day and 2 report runs/day. Cancellation, sources & verification recordCancellation and refund terms unverified ProWritingAid Official Pricing Cards (Annual) ↗ · 2026-10-31 Capture 1 ↗ ProWritingAid Official Pricing Cards (Monthly) ↗ · 2026-10-31 Capture 1 ↗ ProWritingAid Official Pricing Cards (Lifetime) ↗ · 2026-10-31 Capture 1 ↗ |
| Free & trial allowance on the test date | Free accounts reset daily quota at specified time | Not verified |
| Cancellation & refunds | Not verified | Not verified |
| Disclosure of costs & limits | Interface explicitly displays daily reset timer and 1,000-word limit | Not verified |
| Task quality | ||
| Measured fixture results | Fact retention: 100% · Lexical diversity: 80.7% · Semantic similarity: 56.8% · Readability score: 100/100 | Fact retention: 100% · Lexical diversity: 12.5% · Semantic similarity: 92.9% · Readability score: 100/100 |
| Fixture findings | Fact retention rate 100% (7/7), lexical diversity 80.7%, readability score 100, cloud response 4.03s, capability score reached 85.5. | Solid benchmark performance: 100% fact and verification token retention, 92.9% semantic similarity, 8 tone options, and rapid 1.45s turnaround. |
| Original historical observation | Not verified | Not verified |
| Suitable uses · historical assessment | Not verified | Not verified |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | TXT · Output attached · No watermark in test | JSON · Output attached · Check watermark record |
| Historical specification note · not an official maximum | 105-word structured rewritten text (786 bytes) | Sentence-level 3 rephrase candidates + 8 tone mode options |
| Watermark observation | No watermark | Not verified |
| Batch & API | Not verified | Not verified |
| Recorded free-tier dimensions | Not verified | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 4.03s · End-to-end reference: 4.3s | Network-observed server wait: 1.45s · End-to-end reference: 1.45s |
| Date & fixture | 2026-11-04 · anchor_paraphrase_v1 · US-West (California, AS2914) | 2026-11-03 · anchor_paraphrase_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | Account required in this test | Not verified |
| Sign-in methods | Google OAuth or email login required; free tier offers 10 runs/day (up to 1,000 words/run) | Not verified |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | AiVantage LLC | Orpheus Technology Ltd |
| Recorded origin | Not verified | Not verified |
| Domain history record | Not verified | Not verified |
| Background & reputation assessment | Not verified | Not verified |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | Processing location unconfirmed |
| Third-party tracking record | Stripe · Google Analytics · Cloudflare | Stripe · Google Analytics · Datadog |
| Engineering & privacy assessment | Not verified | Not verified |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | ||
| Interaction restraint | ||
| Background & reputation | ||
| Engineering & privacy | ||
| Task quality | 52.5 / 65 Fact Retention: 100% · Lexical Diversity: 80.7% · Semantic Similarity: 56.8% · Readability Score: 100/100 | 46.1 / 65 Fact Retention: 100% · Lexical Diversity: 12.5% · Semantic Similarity: 92.9% · Readability Score: 100/100 |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: 105-word structured rewritten text (786 bytes) | 20 / 20 Clean unwatermarked export (8/8); Export spec: Sentence-level 3 rephrase candidates + 8 tone mode options |
| Processing speed | 13 / 15 Network-observed server wait: 4.03s (API mode: sync_json_verified; network upload 0s / end-to-end 4.3s shown for reference only, never penalized) | 15 / 15 Network-observed server wait: 1.45s (API mode: sync_json_verified; network upload 0s / end-to-end 1.45s shown for reference only, never penalized) |
