quillbot.com · AI content detection
QuillBot, widely adopted by tens of millions of writers globally, demonstrates outstanding diagnostic precision and rapid turnaround with its AI Content Detector. Against our 90-word benchmark AI sample, the v7.1.0 cloud engine completed inference in 1.03s, delivering a calibrated 100.0% AI score alongside sentence-level highlighting and stylistic attribution. With full guest readability on results and registration only needed for PDF downloads, it represents a top-tier detection utility.
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
Exceptional benchmark performance: 100.0% AI probability detection matching ground truth, complete with sentence attribution and style trigger analysis in just 1.03s.
- Original historical observation
Not verified
- 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
Overall AI probability verdict + sentence attribution and trigger analysis (Technical language, Overly polished)
- Watermark observation
Not verified
- Batch & API
Not verified
- Recorded free-tier dimensions
Not verified
- Attached file dimensions
Not verified
Speed & reliability
About 1.03s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Network-observed server wait: 1.03s · End-to-end reference: 1.03s
- 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
Not verified
- Manual adjustment
Not verified
- Interaction observations
Not verified
Background & reputation
Learneo, Inc. (Quillbot Division) · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
Learneo, Inc. (Quillbot Division)
- Recorded origin
Not verified
- Domain history record
Not verified
- Background & reputation assessment
Not verified
- External reputation record
Not verified
Engineering & privacy
Processing location unconfirmed；Explicit retention period unconfirmed; inspect policy record
Detailed facts & historical record
- Processing location
Processing location unconfirmed
- Third-party tracking record
Google Analytics · Datadog · Cloudflare
- Engineering & privacy assessment
Not verified
- Retention statement
Explicit retention period unconfirmed; inspect policy record
Pricing & rules
QuillBot Free and Premium annual pricing structure · 2026-10-31
Text rewriting, basic grammar proofreading, summarizer, citation generator
Unlimited words, advanced suggestions, tone analysis, faster processing；Displays only equivalent $8.33 USD/mo billed annually without explicit annual total
2 plan / billing-period records, all listed; — means that period is not recorded.
Annual tier displays $8.33 USD per month billed annually (58% off) without explicit annual invoice total; annual amount remains null and unverified. Free tier is permanently free with 100-word limit.
Verification has gaps; unknown prices and quotas are not inferred.
Cancellation, sources & verification record
Cancellation and refund terms unverified
QuillBot Premium Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Allowance & disclosure on test date
Not recorded
Not recorded
Evaluation basis & full scores · Overall 97/100
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 · 90/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 33 / 35 | Explanation unavailable | Evidence A → |
| Interaction restraint | 26 / 30 | Explanation unavailable | Evidence A → |
| Background & reputation | 18 / 20 | Explanation unavailable | Evidence A → |
| Engineering & privacy | 13 / 15 | Explanation unavailable | Evidence A → |
Capability · 100/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 65 / 65 | AI Probability: 100% · Human Probability: 0% · Label: ai · Calibrated: Yes | Evidence A → |
| Deliverable specifications | 20 / 20 | Clean unwatermarked export (8/8); Export spec: Overall AI probability verdict + sentence attribution and trigger analysis (Technical language, Overly polished) | Evidence A → |
| Processing speed | 15 / 15 | Network-observed server wait: 1.03s (API mode: sync_json_verified; network upload 0s / end-to-end 1.03s 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.
