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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 | copyleaks.com | smodin.io | Switch / compare |
|---|---|---|---|
| AI paraphrasing & rewriting | Not tested in topic | 82/100 TXT · Output attached | Compare in task topic → |
| AI content detection | 94/100 JSON · Output attached | 91/100 JSON · Output attached | Active task |
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Browse this task →| Criterion | Copyleaks AI content detection 94/100 Seven-aspect task score Copyleaks accurately detected 100% AI generation probability with 0% plagiarism match on the 90-word pure LLM benchmark sample in 27.4 seconds. Beyond the headline score, it highlighted 15 distinct high-frequency AI phrases and delivered sentence-level diagnostic coloration, providing both precision and explainability. Tested export JSON · Output attached Historical test · 2026-11-01 | Smodin (AI Content Detector) AI content detection 91/100 Seven-aspect task score Smodin AI Content Detector accurately identified the benchmark sample as AI-generated (84% probability, AI-Impacted verdict) within 3.2 seconds, offering multi-detector comparisons. While an entry threshold of 1000 characters and locked sentence-level insights apply to free users, core detection reliability remains solid. Tested export JSON · Output attached Historical test · 2026-11-04 |
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| Pricing & rules | ||
| Pricing plans | Copyleaks Personal and Pro subscription pricing structure · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Personal (Monthly)2026-10-31 ↗ USD 16.99/month — Monthly 100 unified credits/mo (scan up to 25,000 words or 100 images), multi-file batch upload, extension, Google Docs add-on, MCP access AI text & image detection, 30+ languages AI detection, 100+ languages plagiarism check, Shared Data Hub Pro (Monthly)2026-10-31 ↗ USD 99.99/month — Monthly Includes 25 user seats, 1,000 unified credits/mo (up to 250,000 words or 1,000 images), website scanning, cross-language translation detection, analytics All Personal features, 25 seats, advanced filters, website scanning, cross-language translation detection, analytics dashboard Personal (Annual)2026-10-31 ↗ — USD 167.88/year Annual $167.88 billed annually ($13.99/mo equivalent), 1,200 unified credits (up to 300,000 words or 1,200 images) Personal tier annual features Pro (Annual)2026-10-31 ↗ — USD 899.88/year Annual $899.88 billed annually ($74.99/mo equivalent), 25 seats, 12,000 unified credits (up to 3M words or 12k images) Pro tier annual features 4 plan / billing-period records, all listed; — means that period is not recorded. Verified monthly rates: Personal $16.99/mo, Pro $99.99/mo; explicit annual upfront invoice totals: Personal $167.88/yr ($13.99/mo), Pro $899.88/yr ($74.99/mo); extra unified credits available for top-up. Cancellation, sources & verification recordCancellation and refund terms unverified Copyleaks Official Pricing Page (Annual View) ↗ · 2026-10-31 Capture 1 ↗ Copyleaks Official Pricing Page (Monthly View) ↗ · 2026-10-31 Capture 1 ↗ | Smodin free daily limits, Starter, and Premium subscription pricing tiers · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-31 ↗ Free Free Free Daily limited AI rephrasing and detection queries with anonymous access Basic AI detection and rewriting queries Starter (Monthly)2026-10-31 ↗ USD 12.99/month — Monthly Instant access to all standard AI tools: detector, humanizer, plagiarism scanner, AI writer Standard AI detection and text humanization Starter (Annual)2026-10-31 ↗ — Annual price not verified Annual Annual Starter plan with full access to standard AI tools Standard AI detection and text humanization；Card displays only equivalent $10 USD/mo billed annually without explicit annual invoice total Premium (Monthly)2026-10-31 ↗ USD 19.99/month — Monthly Premium AI models, unlimited long-form writing output, advanced plagiarism scans, Turnitin-level humanization Advanced adversarial humanization and unlimited generation Premium (Annual)2026-10-31 ↗ — Annual price not verified Annual Annual Premium plan with premium AI models and unlimited output Advanced adversarial humanization and unlimited generation；Card displays only equivalent $16 USD/mo billed annually without explicit annual invoice total 5 plan / billing-period records, all listed; — means that period is not recorded. Verified monthly rates: Starter $12.99/mo, Premium $19.99/mo; annual plan cards show monthly equivalents ($10/mo, $16/mo) without explicit annual invoice total; annual plans kept unverified. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancellation and refund terms unverified Smodin Official Pricing Cards (Monthly) ↗ · 2026-10-31 Capture 1 ↗ Smodin Official Pricing Cards (Annual) ↗ · 2026-10-31 Capture 1 ↗ |
| Free & trial allowance on the test date | Free trial credits granted upon signup for full scan execution | Free tier requires 1000 characters minimum; unlimited basic checks |
| Cancellation & refunds | Not verified | Not verified |
| Disclosure of costs & limits | Input word count and remaining credits clearly visible prior to scanning | Character bounds and score cards shown immediately upon processing |
| Task quality | ||
| Measured fixture results | AI probability: 100% · Human probability: 0% · Classification label: AI-generated · Confidence calibrated: Yes | AI probability: 84% · Human probability: 23% · Classification label: AI-generated · Confidence calibrated: Yes |
| Fixture findings | 100.0% AI probability detection with 15 granular AI phrases and full sentence-level diagnostic coloration. | Accurately detects 84.0% AI probability and AI-Impacted label on the benchmark anchor, perfectly matching ground truth within 3.20s. |
| Original historical observation | Copyleaks processed the benchmark anchor in 27.38s server wait time, accurately flagging 100% AI probability and 15 phrase clusters (01_landing.png, 02_prompt_filled.png, 03_result.png). | Accurately identified 84.0% AI probability matching ground truth, providing detector comparison insights with an overall score of 91.3. |
| Suitable uses · historical assessment | Organizations and creators needing enterprise-grade AI originality verification, multilingual AIGC auditing, and academic integrity analysis | Students, educators, and writers seeking fast AI probability detection |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | JSON · Output attached · No watermark in test | JSON · Output attached · Check watermark record |
| Historical specification note · not an official maximum | Full sentence-level coloration + 15 AI phrase attributions + plagiarism comparison report | Online Probability Score & Detection Card |
| Watermark observation | Zero watermark | Completely watermark-free |
| Batch & API | Supports single/batch text uploads, REST API, and MCP protocol integration | Web interactive input + developer API |
| Recorded free-tier dimensions | Not verified | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 27.38s · End-to-end reference: 27.38s | Network-observed server wait: 3.2s · End-to-end reference: 3.2s |
| Date & fixture | 2026-11-01 · anchor_aidetector_v1 · US-West (California, AS2914) | 2026-11-04 · anchor_aidetector_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 | Demo on homepage; formal scan via Google account login | No login required for basic detection |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Clean web interface without forced registration or disruptive marketing popups. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Copyleaks Inc. | Smodin LLC |
| Recorded origin | Stamford, Connecticut, United States | United States |
| Domain history record | Founded in 2015 | 2019–Present |
| Background & reputation assessment | Not verified | Operated by Smodin LLC, providing AI writing assistance and multi-lingual language tools globally. |
| External reputation record | Top-tier content authenticity, copyright compliance, and AIGC detection platform listed on Inc. 5000. | Widely used AI writing, rewriting, and detection platform serving multi-lingual users globally. |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Processing location unconfirmed |
| Third-party tracking record | Google Analytics · Google Tag Manager | Google Analytics · Stripe · PayPal |
| Engineering & privacy assessment | Not verified | Standard HTTPS encryption; temporary text evaluation without unauthorized permanent caching. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 26 / 35 Free tier transparently provides AI percentage scores, though sentence-level highlighting requires Pro subscription. | |
| Interaction restraint | 24 / 30 Clean web interface without forced registration or disruptive marketing popups. | |
| Background & reputation | 16 / 20 Operated by Smodin LLC, providing AI writing assistance and multi-lingual language tools globally. | |
| Engineering & privacy | 13 / 15 Standard HTTPS encryption; temporary text evaluation without unauthorized permanent caching. | |
| Task quality | 65 / 65 AI Probability: 100% · Human Probability: 0% · Label: ai · Calibrated: Yes | 65 / 65 AI Probability: 84% · Human Probability: 23% · Label: ai · Calibrated: Yes |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: Full sentence-level coloration + 15 AI phrase attributions + plagiarism comparison report | 18 / 20 Clean unwatermarked export (8/8); Export spec: Online Probability Score & Detection Card |
| Processing speed | 10 / 15 Network-observed server wait: 27.38s (API mode: async_verified; network upload 0s / end-to-end 27.38s shown for reference only, never penalized) | 13.5 / 15 Network-observed server wait: 3.2s (API mode: sync_json_verified; network upload 0s / end-to-end 3.2s shown for reference only, never penalized) |
