languagetool.org · AI paraphrasing & rewriting
LanguageTool demonstrated exceptional academic precision in AI text paraphrasing: it restructured the complete benchmark anchor within 4.1 seconds, achieving 67.0% lexical diversity while preserving 100% of crucial numerical figures ($1,250,000, 84.2%) and the verification token without hallucination or truncation. Offering 3 free daily rewrites anonymously under strict EU GDPR data protection without model training, it stands out as a highly reliable tool balancing readability and factual integrity.
Tested export TXT · Output attached
Historical test · 2026-11-02
Account / tier unconfirmed · 80-word academic & business text master (with currency, percentage & verification token, 756 B) · Output attached
Task quality
Fact retention 100% · Lexical diversity 67% · Semantic similarity 63.3% · Readability score 100/100
Detailed facts & historical record
- Measured fixture results
Fact retention: 100% · Lexical diversity: 67% · Semantic similarity: 63.3% · Readability score: 100/100
- Fixture findings
In the anchor_paraphrase_v1 benchmark, LanguageTool substantively restructured all 5 sentences with 67.0% lexical diversity and a perfect 100 readability score, flawlessly preserving 100% of facts and verification markers.
- Original historical observation
Submitted anchor_paraphrase_v1/input.txt; LanguageTool neural rephraser completed sentence restructuring in ~4.1s with 67.0% lexical diversity and 100% fact retention.
- Suitable uses · historical assessment
Not verified
- Result & output evidence
Delivery capabilities
TXT · Output attached · Check watermark record
Detailed facts & historical record
- Recorded export specifications
TXT · 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 4.1s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Network-observed server wait: 4.1s · End-to-end reference: 4.1s
- Date & fixture
2026-11-02 · anchor_paraphrase_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
Completely anonymous usage supported; optional Google, Apple, and email login
- Manual adjustment
Not verified
- Interaction observations
Not verified
Background & reputation
LanguageTooler GmbH · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
LanguageTooler GmbH
- Recorded origin
Not verified
- Domain history record
Not verified
- Background & reputation assessment
Not verified
- External reputation record
Not verified
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
Stripe · Cloudflare
- Engineering & privacy assessment
Not verified
- Retention statement
Explicit retention period unconfirmed; inspect policy record
Pricing & rules
LanguageTool Basic and Premium individual multi-period subscription pricing structure · 2026-10-31
Basic grammar check, punctuation check, personal dictionary
In-depth grammar & punctuation, style improvements, AI paraphrasing, style guide
In-depth grammar & punctuation, style improvements, AI paraphrasing, style guide
In-depth grammar & punctuation, style improvements, AI paraphrasing, style guide
4 plan / billing-period records, all listed; — means that period is not recorded.
Explicitly details actual invoice amounts: $24.90/month, $49.90/quarter, $69.90/year, and $119.80 for 2 years; Basic tier is permanently free with 2k chars and 3 daily AI rewrites.
Cancellation, sources & verification record
Cancellation and refund terms unverified
LanguageTool Premium Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Allowance & disclosure on test date
3 free AI paraphrasing queries per day without login, up to 1,250 characters per query
Not recorded
Evaluation basis & full scores · Overall 88/100
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_paraphrase_v1
Honesty & reputation · 95/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 33 / 35 | Explanation unavailable | Evidence A → |
| Interaction restraint | 28 / 30 | Explanation unavailable | Evidence A → |
| Background & reputation | 19 / 20 | Explanation unavailable | Evidence A → |
| Engineering & privacy | 15 / 15 | Explanation unavailable | Evidence A → |
Capability · 85/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 51 / 65 | Fact Retention: 100% · Lexical Diversity: 67% · Semantic Similarity: 63.3% · Readability Score: 100/100 | Evidence A → |
| Deliverable specifications | 20 / 20 | Watermarked or blocked free export (0/8) | Evidence A → |
| Processing speed | 14 / 15 | Network-observed server wait: 4.1s (API mode: sync_json_verified; network upload 0.1s / end-to-end 4.1s 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.
