scribbr.com · AI content detection
Scribbr Free AI Detector, powered by Learneo/QuillBot v7.1.0, evaluated our 90-word benchmark sample in 1.8s (2.0s end-to-end), accurately detecting 100.0% AI probability with sentence-level diagnostic coloration and guest access up to 1,200 words, earning an overall score of 98.
Tested export JSON · Output attached
Historical test · 2026-11-03
Account / tier unconfirmed · Calibrated AI vs human text benchmark (literature master & LLM prose, 780 B) · Output attached
Task quality
AI probability 100% · Human probability 0% · Classification label AI-generated · Confidence calibrated Yes
Detailed facts & historical record
- Measured fixture results
AI probability: 100% · Human probability: 0% · Classification label: AI-generated · Confidence calibrated: Yes
- Fixture findings
Accurately diagnosed 100.0% AI probability and 0% human probability matching ground truth, providing full sentence-level coloration breakdown.
- Original historical observation
Submitted 90-word standard AI anchor text (anchor_aidetector_v1, ai_sample.txt) to Scribbr AI detector (scribbr.com/ai-detector/); evaluated via v7.1.0 model in 1.8s (2.0s end-to-end), accurately diagnosing 100% AI generation probability with complete sentence-level diagnostic coloration (01_landing.png, 02_result.png).
- Suitable uses · historical assessment
Not verified
- Result & output evidence
Delivery capabilities
JSON · Output attached · Check watermark record
Detailed facts & historical record
- Recorded export specifications
JSON · Output attached · Check watermark record
- Historical specification note · not an official maximum
Not verified
- Watermark observation
Not verified
- Batch & API
Not verified
- Recorded free-tier dimensions
Not verified
- Attached file dimensions
Not verified
Speed & reliability
About 2s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Network-observed server wait: 1.8s · End-to-end reference: 2s
- Date & fixture
2026-11-03 · anchor_aidetector_v1 · US-West (California, AS2914)
- Repeated tests & reliability
No standardized repetition count, success rate or variability range is recorded.
Interaction experience
Account requirement unconfirmed
Detailed facts & historical record
- Account requirements
Not verified
- Sign-in methods
No login required for basic tools; Google OAuth or email for premium plagiarism checks
- Manual adjustment
Not verified
- Interaction observations
Not verified
Background & reputation
Scribbr B.V. (Learneo, Inc.) · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
Scribbr B.V. (Learneo, Inc.)
- Recorded origin
Amsterdam, Netherlands / California, US
- Domain history record
Founded in 2012
- Background & reputation assessment
Not verified
- External reputation record
Internationally recognized academic integrity brand serving millions of students, backed by top Trustpilot rating.
Engineering & privacy
Uploaded for cloud processing；Explicit retention period unconfirmed; inspect policy record
Detailed facts & historical record
- Processing location
Uploaded for cloud processing
- Third-party tracking record
Google Analytics · Datadog
- Engineering & privacy assessment
Not verified
- Retention statement
Explicit retention period unconfirmed; inspect policy record
Pricing & rules
Scribbr free sign-up-free tools and pay-per-check plagiarism report pricing model · 2026-10-31
Basic AI content detection and citation generation
Turnitin plagiarism check and AI content analysis
Academic plagiarism check for regular manuscripts and theses
Academic plagiarism check for extensive monographs and dissertations
4 plan / billing-period records, all listed; — means that period is not recorded.
AI detector and citation tools are 100% free with no sign-up; premium plagiarism check is billed per document without recurring subscription: Small $19.95, Regular $29.95, Large $39.95.
Cancellation, sources & verification record
Cancellation and refund terms unverified
Scribbr Plagiarism Checker & Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Allowance & disclosure on test date
Not recorded
Not recorded
Evaluation basis & full scores · Overall 98.3/100
Overall = honesty & reputation × 30% + capability × 70%. Component maxima follow this report’s rubric. List scores are rounded for display; original precision is retained here.
Scoring version 2.3.1 · Test fixture anchor_aidetector_v1
Honesty & reputation · 99/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 35 / 35 | Explanation unavailable | Evidence A → |
| Interaction restraint | 30 / 30 | Explanation unavailable | Evidence A → |
| Background & reputation | 19 / 20 | Explanation unavailable | Evidence A → |
| Engineering & privacy | 15 / 15 | Explanation unavailable | Evidence A → |
Capability · 98/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 65 / 65 | AI Probability: 100% · Human Probability: 0% · Label: ai · Calibrated: Yes | Evidence A → |
| Deliverable specifications | 18 / 20 | Watermarked or blocked free export (0/8) | Evidence A → |
| Processing speed | 15 / 15 | Network-observed server wait: 1.8s (API mode: cloud_api_sync; network upload 0.2s / end-to-end 2s shown for reference only, never penalized) | Evidence A → |
Legacy scores may include advertised maximum capabilities. Read tested output separately from paid capabilities. Records without matching tiers and scope are not ranked together.
