Scribbr · 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.
US-West (California, AS2914)
JSON · Output attached · Open native file ↗
Subsequent pricing and service checks are shown separately without altering historical scores.
One run does not establish all complex scenes, untested paid maxima or long-term uptime.
Plans & historical pricing
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 ↗
Pricing recorded on the test date · 2026-11-03
AI detector is free without login; plagiarism check from .95/doc
Free utility + pay-per-document (non-subscription)
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- Full AI probability diagnosis and sentence-level highlights up to 1,200 words per run
- Watermark
- Not recorded or not verified
- Free allowance
- Not recorded or not verified
- Account requirements
- No login required for basic tools; Google OAuth or email for premium plagiarism checks
- Maximum specification record
- Not recorded or not verified
May include advertised capabilities; this does not establish a tested paid tier.
- Batch & API
- Not recorded or not verified
- Manual refinement
- Not recorded or not verified
Tested result & sample
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).
- Fixture
- anchor_aidetector_v1
- Recorded environment
- US-West (California, AS2914)
- Network-observed server wait
- 1.8 s
- End-to-end reference
- 2 s
Network wait includes round trips, queuing and polling error, not pure inference time. Local timings depend on the device; repetition counts are not standardized in legacy records.
Experience, rules & trust
- Disclosure
- Not recorded or not verified
- Interaction
- Not recorded or not verified
- Entity record
- Scribbr B.V. (Learneo, Inc.)
- Origin
- Amsterdam, Netherlands / California, US
- Domain history record
- Founded in 2012
- Third-party tracking record
- Google Analytics · Datadog
- External information
- Internationally recognized academic integrity brand serving millions of students, backed by top Trustpilot rating.
- Processing
- Learneo cloud distributed neural network classification and linguistic analysis pipeline
- Retention statement
- Pledges never to store documents in public databases, fully GDPR compliant
A recorded statement does not verify deletion or all data-processing behavior.
Verifiable audit trail & evidence
Four SHA-256-verified stages link the benchmark fixture, same-run interface screenshots, native exported artifact and archived pricing sources.
anchor_aidetector_v1 · Inspect fixture & file inspector →
Captures entry rules, result view and export disclosure.
Screenshots, native output and official claims support different conclusions. Evidence grades are not product safety certifications.
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.
Revisions & corrections
- 2026-11-03
Initial benchmark evaluation on standard AI text anchor; 100% accurate AI detection and sentence highlights, auto-approved for publication.