LanguageTool · 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.
US-West (California, AS2914)
TXT · 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
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 ↗
Pricing recorded on the test date · 2026-11-02
Basic Free tier (3/day); Premium $24.90/mo ($49.90/quarter, $69.90/yr)
Freemium + multi-period tiered subscription
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- Free generation and one-click copy of 5 complete rewritten sentences
- Watermark
- Not recorded or not verified
- Free allowance
- 3 free AI paraphrasing queries per day without login, up to 1,250 characters per query
- Account requirements
- Completely anonymous usage supported; optional Google, Apple, and email login
- 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 anchor_paraphrase_v1/input.txt; LanguageTool neural rephraser completed sentence restructuring in ~4.1s with 67.0% lexical diversity and 100% fact retention.
- Fixture
- anchor_paraphrase_v1
- Recorded environment
- US-West (California, AS2914)
- Network-observed server wait
- 4.1 s
- End-to-end reference
- 4.1 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
- LanguageTooler GmbH
- Origin
- Not recorded or not verified
- Domain history record
- Not recorded or not verified
- Third-party tracking record
- Stripe · Cloudflare
- External information
- Not recorded or not verified
- Processing
- Cloud multilingual neural paraphrasing cluster with instant client-side sentence rendering
- Retention statement
- Strict GDPR compliance; user texts are processed in volatile memory and purged immediately post-check without model training
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_paraphrase_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 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.
Revisions & corrections
- 2026-11-02
Initial benchmark publication: fully passed anchor_paraphrase_v1 benchmark, confirming 100% fact retention, 67% lexical diversity, and zero-truncation delivery.