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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 | zerogpt.com | 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 | ZeroGPT AI paraphrasing & rewriting 87/100 Seven-aspect task score Anonymous instant rewriting up to 300 words per scan, finishing cloud inference in 5.83s with 100% fact/token retention, 80.7% lexical diversity, and multi-color change highlights. Tested export TXT · Output attached Historical test · 2026-11-05 | 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 | ZeroGPT Free, Pro, Plus, and Max personal subscription pricing structure · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-31 ↗ USD 0/month — Monthly 15,000 characters per scan, 1,250,000 words/mo allowance, 300 words one-time plagiarism check Basic AI detection and text analysis PRO (Monthly)2026-10-31 ↗ USD 14.99/month — Monthly 100,000 chars per scan, 50 batch files, 4.5M words/mo, ad-free experience, PDF reports Ad-free AI detection, PDF report export, thinking mode paraphraser & summarizer PLUS (Monthly)2026-10-31 ↗ USD 21.99/month — Monthly 100,000 chars per scan, 60 batch files, 5M words/mo, 35,000 words/mo plagiarism All PRO features, AI video detector, monthly plagiarism allowance MAX (Monthly)2026-10-31 ↗ USD 30.99/month — Monthly 150,000 chars per scan, 75 batch files, 7.5M words/mo, 60,000 words/mo plagiarism All PLUS features, unlimited paraphrase modes, ZeroCHAT-5 access PRO (Annual)2026-10-31 ↗ — USD 107.88/year Annual $107.88 billed annually ($8.99/mo equivalent), all PRO features included PRO tier annual features PLUS (Annual)2026-10-31 ↗ — USD 167.88/year Annual $167.88 billed annually ($13.99/mo equivalent), all PLUS features included PLUS tier annual features MAX (Annual)2026-10-31 ↗ — USD 239.88/year Annual $239.88 billed annually ($19.99/mo equivalent), all MAX features included MAX tier annual features 7 plan / billing-period records, all listed; — means that period is not recorded. Verified monthly rates: Pro $14.99/mo, Plus $21.99/mo, Max $30.99/mo; explicit annual upfront invoice totals: Pro $107.88/yr ($8.99/mo), Plus $167.88/yr ($13.99/mo), Max $239.88/yr ($19.99/mo); Free tier provides 15k chars/scan and 1.25M words/mo. Cancellation, sources & verification recordCancellation and refund terms unverified ZeroGPT Official Pricing Page (Annual View) ↗ · 2026-10-31 Capture 1 ↗ ZeroGPT Official Pricing Page (Monthly View) ↗ · 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 | 300 words per scan free; paid tiers expand to 10k words and unlimited modes | Not verified |
| Cancellation & refunds | Not verified | Not verified |
| Disclosure of costs & limits | Results displayed immediately in workspace with one-click copy | Not verified |
| Task quality | ||
| Measured fixture results | Fact retention: 100% · Lexical diversity: 80.7% · Semantic similarity: 55.3% · Readability score: 100/100 | Fact retention: 100% · Lexical diversity: 12.5% · Semantic similarity: 92.9% · Readability score: 100/100 |
| Fixture findings | 100% retention across all 7 facts and security token, natural syntax rephrasing, 100% readability score, and fully usable without login. | Solid benchmark performance: 100% fact and verification token retention, 92.9% semantic similarity, 8 tone options, and rapid 1.45s turnaround. |
| Original historical observation | Input 80-word standard paraphrase anchor fixture (anchor_paraphrase_v1/input.txt); ZeroGPT returned 93-word rewritten text in 5.83s, retaining 100% of facts including REALTEST-PARAPHRASE-VERIFIED-2026, $1,250,000, and 84.2% with 80.7% lexical diversity. | 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 | Full 5-paragraph rewritten text + 3-color highlights + statistics card | 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 | 0.7 | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 5.83s · End-to-end reference: 6.49s | Network-observed server wait: 1.45s · End-to-end reference: 1.45s |
| Date & fixture | 2026-11-05 · 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 | No login in this test | Not verified |
| Sign-in methods | Anonymous rewriting supported; Google OAuth and email sign-in for accounts | Not verified |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Direct anonymous rewriting on homepage without popup barriers; presence of banner advertisements around workspace. | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Olive Works LLC | Orpheus Technology Ltd |
| Recorded origin | Wyoming, USA | Not verified |
| Domain history record | Operating since January 2023 | Not verified |
| Background & reputation assessment | Operated by Olive Works LLC in Wyoming; massive global traffic, though debated in academia regarding false positive thresholds. | Not verified |
| External reputation record | Globally popular AI text detector and paraphraser widely adopted across students and content creators. | Not verified |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | Processing location unconfirmed |
| Third-party tracking record | Google Analytics · Cloudflare | Stripe · Google Analytics · Datadog |
| Engineering & privacy assessment | Secured via Cloudflare and TLS 1.3; privacy terms state texts are processed for instant analysis and not repurposed for foundation model training. | Not verified |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 35 / 35 Free tier allows 300 words per scan; paid plans Pro ($14.99/mo or $107.88/yr), Plus ($21.99/mo or $167.88/yr), and Max ($30.99/mo or $239.88/yr) provide 10k words with clear upfront billing. | |
| Interaction restraint | 24 / 30 Direct anonymous rewriting on homepage without popup barriers; presence of banner advertisements around workspace. | |
| Background & reputation | 15 / 20 Operated by Olive Works LLC in Wyoming; massive global traffic, though debated in academia regarding false positive thresholds. | |
| Engineering & privacy | 14 / 15 Secured via Cloudflare and TLS 1.3; privacy terms state texts are processed for instant analysis and not repurposed for foundation model training. | |
| Task quality | 52.2 / 65 Fact Retention: 100% · Lexical Diversity: 80.7% · Semantic Similarity: 55.3% · 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: Full 5-paragraph rewritten text + 3-color highlights + statistics card | 20 / 20 Clean unwatermarked export (8/8); Export spec: Sentence-level 3 rephrase candidates + 8 tone mode options |
| Processing speed | 15 / 15 Network-observed server wait: 5.83s (API mode: sync_json_verified; network upload 0s / end-to-end 6.49s 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) |
