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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | undetectable.ai | hemingwayapp.com | Switch / compare |
|---|---|---|---|
| AI paraphrasing & rewriting | 81/100 TXT · Output attached | 65/100 TXT · Output attached | Active task |
| AI content detection | 95/100 PDF · Output attached | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | Undetectable AI AI paraphrasing & rewriting 81/100 Seven-aspect task score Undetectable AI's Humanizer specializes in adversarial humanization and paraphrasing. During testing, its base model completed rewriting in 0.76s with 92.0% lexical diversity while preserving the verification token and critical numeric facts, supporting free guest usage and one-click clipboard export. Tested export TXT · Output attached Historical test · 2026-11-04 | Hemingway Editor AI paraphrasing & rewriting 65/100 Seven-aspect task score Hemingway Editor (Boondoggle Studio, LLC) is famed for color-coded readability grading and offers a free online AI paraphraser. In testing, its cloud API is fast (1.31s server wait) and produces fluent phrasing with one-click copying; however, the free tool imposes strict output truncation (cutting off mid-sentence at word 17), dropping key data points and tokens, positioning it primarily as a short-sentence teaser for Hemingway Editor Plus. Tested export TXT · Output attached Historical test · 2026-11-01 |
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| Pricing & rules | ||
| Pricing plans | Undetectable AI Free Trial, Monthly, and Annual word-quota subscription plans · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Trial2026-10-31 ↗ Free Free Free 250 words free trial quota for basic AI detection and humanization Basic AI detection and humanization trial 10K Words (Monthly)2026-10-31 ↗ USD 9.99/month — Monthly 10,000 words per month, unlimited AI detection, API compatibility, high quality output AI content detection and text humanization 10K Words (Annual)2026-10-31 ↗ — USD 60/year Annual Billed annually at $60.00 ($5.00/mo equivalent), 10,000 words per month, unlimited AI detection AI content detection and text humanization 20K Words (Monthly)2026-10-31 ↗ USD 19/month — Monthly 20,000 words per month, unlimited AI detection and Human Auto Typer AI content detection and text humanization 20K Words (Annual)2026-10-31 ↗ — USD 114/year Annual Billed annually at $114.00 ($9.50/mo equivalent), 20,000 words per month AI content detection and text humanization 35K Words (Annual)2026-10-31 ↗ — USD 189/year Annual Billed annually at $189.00 ($15.75/mo equivalent), 35,000 words per month AI content detection and text humanization 6 plan / billing-period records, all listed; — means that period is not recorded. Annual plan cards explicitly show the upfront invoice total (e.g. 10K words charged annually $60.00 at $5.00/mo equivalent) alongside monthly original rates ($9.99/mo); free trial is capped at 250 words. Cancellation, sources & verification recordCancellation and refund terms unverified Undetectable AI Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗ | Hemingway Editor free web editor and Plus subscription pricing tiers · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Web Editor2026-10-31 ↗ Free Free Free Unlimited readability grade level scoring, multi-color highlighting for wordy sentences, passive voice, and adverbs without login Basic readability scoring and syntactic highlighting Individual 5K (Monthly)2026-10-31 ↗ USD 25/month — Monthly 5,000 AI sentence rewrites/month, unlimited advanced grammar fixes, tone & style adjustments, file import/export AI sentence rewriting and advanced grammar editing Individual 5K (Annual)2026-10-31 ↗ — USD 100/year Annual Billed annually at $100.00 ($8.33/mo equivalent), 5,000 AI sentence rewrites/month, unlimited grammar fixes AI sentence rewriting and advanced grammar editing Individual 10K (Monthly)2026-10-31 ↗ USD 30/month — Monthly 10,000 AI sentence rewrites/month, unlimited advanced grammar fixes, document review & feedback High volume AI sentence rewriting and grammar editing Individual 10K (Annual)2026-10-31 ↗ — USD 150/year Annual Billed annually at $150.00 ($12.50/mo equivalent), 10,000 AI sentence rewrites/month High volume AI sentence rewriting and grammar editing 5 plan / billing-period records, all listed; — means that period is not recorded. Web readability editor is 100% free with no sign-up; Plus features include a 2-week trial without credit card; monthly rates are Individual 5K $25/mo, Individual 10K $30/mo; annual plans explicitly invoice $100/yr ($8.33/mo equiv) and $150/yr ($12.50/mo equiv). Cancellation, sources & verification recordCancellation and refund terms unverified Hemingway Editor Plus Pricing Table (Annual) ↗ · 2026-10-31 Capture 1 ↗ Hemingway Editor Plus Pricing Table (Monthly) ↗ · 2026-10-31 Capture 1 ↗ |
| Free & trial allowance on the test date | Basic model free without login; advanced model requires subscription | Free guest usage for basic paraphrasing; unlimited usage requires Hemingway Editor Plus |
| Cancellation & refunds | Not verified | Not verified |
| Disclosure of costs & limits | Queue notification on submission followed by immediate result display | Not verified |
| Task quality | ||
| Measured fixture results | Fact retention: 85.7% · Lexical diversity: 92% · Semantic similarity: 29.3% · Readability score: 65/100 | Fact retention: 0% · Lexical diversity: 98.9% · Semantic similarity: 12% · Readability score: 55/100 |
| Fixture findings | Achieved 92.0% lexical diversity while accurately preserving the verification token and core financial figures, exporting 168 words of complete text without truncation. | Lexical variety is high and fluent, but output truncation mid-sentence prevented full factual preservation. |
| Original historical observation | Input 87-word standard paraphrase fixture (anchor_paraphrase_v1/input.txt); Undetectable AI delivered structural rewriting (168 words, 92.0% lexical diversity) while retaining REALTEST-PARAPHRASE-VERIFIED-2026, $1,250,000, and 84.2%. | Input standard 82-word benchmark text; clicking 'Paraphrase my text' returned result in 1.31s; output was truncated at word 17 ('while enh') without retaining verification token; copyable. |
| Suitable uses · historical assessment | Not verified | Not verified |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | TXT · Output attached · No watermark in test | TXT · Output attached · Check watermark record |
| Historical specification note · not an official maximum | Side-by-side visual diff highlighting + complete one-click copy | Free tier output truncated around 17 words (cut off mid-sentence) |
| Watermark observation | No watermark | Not verified |
| Batch & API | Not verified | Not verified |
| Recorded free-tier dimensions | 1 | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 0.76s · End-to-end reference: 0.76s | Network-observed server wait: 1.31s · End-to-end reference: 1.31s |
| Date & fixture | 2026-11-04 · anchor_paraphrase_v1 · US-West (California, AS2914) | 2026-11-01 · anchor_paraphrase_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | No login in this test | Not verified |
| Sign-in methods | Guest mode supports basic model; advanced models require subscription | Web tool requires zero login; Plus supports Google OAuth or email |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Direct paste and rewrite workflow; free queue does not require login, and rewritten output copies with a single click without intrusive ads. | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Undetectable AI | Boondoggle Studio, LLC |
| Recorded origin | Florida / New York, USA | Not verified |
| Domain history record | Operating since 2023 | Not verified |
| Background & reputation assessment | Registered US entity Undetectable Inc. with wide media recognition, though adversarial detection evasion carries academic ethics controversies. | Not verified |
| External reputation record | Well-known AI detection and humanization platform widely discussed across developer and content creator communities. | Not verified |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Cloudflare · Hotjar · Meta Pixel | Google Analytics · Stripe · Cloudflare Turnstile |
| Engineering & privacy assessment | Protected by TLS 1.3 and Cloudflare security with clear privacy terms. | Not verified |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 32 / 35 Pricing transparently lists monthly rates, annual monthly equivalents, and exact upfront annual totals ($60.00, $114.00, $189.00); free trial available without mandatory card binding. | |
| Interaction restraint | 27 / 30 Direct paste and rewrite workflow; free queue does not require login, and rewritten output copies with a single click without intrusive ads. | |
| Background & reputation | 16 / 20 Registered US entity Undetectable Inc. with wide media recognition, though adversarial detection evasion carries academic ethics controversies. | |
| Engineering & privacy | ||
| Task quality | 46 / 65 Fact Retention: 85.7% · Lexical Diversity: 92% · Semantic Similarity: 29.3% · Readability Score: 65/100 | 22 / 65 Fact Retention: 0% · Lexical Diversity: 98.9% · Semantic Similarity: 12% · Readability Score: 55/100 |
| Deliverable specifications | 16 / 20 Clean unwatermarked export (8/8); Export spec: Side-by-side visual diff highlighting + complete one-click copy | 16 / 20 Clean unwatermarked export (8/8); Export spec: Free tier output truncated around 17 words (cut off mid-sentence) |
| Processing speed | 15 / 15 Network-observed server wait: 0.76s (API mode: sync_json_verified; network upload 0s / end-to-end 0.76s shown for reference only, never penalized) | 15 / 15 Network-observed server wait: 1.31s (API mode: sync_json_verified; network upload 0s / end-to-end 1.31s shown for reference only, never penalized) |
