Frequently asked
questions

HumanAI is a privacy-first platform that transforms AI-generated text into natural, human-sounding writing. We offer 15 specialized tools including AI Humanizer, AI Content Detector, Plagiarism Checker, and more — all designed to help you create authentic, undetectable content while preserving your meaning, citations, and voice.

No. Our free tier requires no signup, no credit card, and no account. You can humanize up to 200 words per attempt and use each free tool 3 times per day. Premium features require a $9.99/mo subscription.

Yes — 4 of our 15 tools are free forever with daily limits (3 uses per day). These include the AI Humanizer (200 words), AI Content Detector (500 words), AI Writing Checker, and Basic Plagiarism Checker. Premium tools are available with a $9.99/mo subscription.

Three key differences: (1) We preserve APA, MLA, and Chicago citations — most humanizers break them. (2) We offer built-in detection verification against 10+ detectors including Turnitin and GPTZero. (3) We have 4 specialized modes (Academic, Casual, Professional, SEO) instead of one-size-fits-all rewriting.

HumanAI is part of the Toolly.site network — a collection of 14 specialized tool websites. Each brand operates independently but shares a commitment to privacy-first, no-signup tools. You can explore the full ecosystem at toolly.site.

HumanAI serves students, content writers, academics, SEO professionals, and agencies. Whether you need to humanize an essay for college, create undetectable blog content, or process bulk articles for clients, our 15 tools cover the full spectrum of AI text transformation and detection needs.

Currently, HumanAI is optimized for English text. Our humanization engine, citation preserver, and detector are all calibrated for English-language writing. We are actively expanding support for Spanish, French, German, and other languages and expect to launch multilingual support soon.

Yes. Our humanization engine is designed to handle output from all major LLMs including ChatGPT (GPT-3.5, GPT-4, GPT-4o), Claude, Gemini, Perplexity, and others. Each model leaves different stylistic fingerprints — our tool is trained to identify and neutralize all of them.

Our humanization engine produces text that passes as human in approximately 83-88% of cases across major detectors on the first pass. Using our Multi-Detector Simulator to iterate and adjust can push that rate higher. No humanizer offers 100% guaranteed bypass, and any tool that claims otherwise is being dishonest.

Yes. HumanAI is fully responsive and works on all mobile devices, tablets, and desktops. The web interface adapts to your screen size, and our Chrome extension works on mobile Chrome as well. No app download required.

Yes. Free users can browse our FAQ and help docs. Premium subscribers get email support with responses within 24 hours. Agency and enterprise clients get priority support with direct access to our team. Contact us at support@toolly.site anytime.

We update our humanization engine and detector models monthly to keep pace with new AI models and detector updates. When Turnitin or GPTZero releases a new detection method, we typically release a counter-update within 2-4 weeks.

Absolutely. We actively build tools based on user feedback. Visit our Recommend a Tool page or email admin@toolly.site with your suggestion. Many of our current tools started as user requests.

No. HumanAI is an independent platform. We use OpenAI's API as our processing backend, but we are not owned by, partnered with, or affiliated with OpenAI, Anthropic, Google, or any other AI model provider.

A good humanizer restructures sentences, varies rhythm, and uses context-aware rewriting — not just synonym swapping. Bad humanizers simply trade words for synonyms, which leaves the sentence skeleton intact and creates its own detectable pattern. Research shows deep structural rewriting passes detectors far more often than surface-level word-swapping.

Paste your AI-generated text, select a mode (Academic, Casual, Professional, or SEO), and click "Humanize." Our engine rewrites the text using natural language patterns — varying sentence length, adding human-like transitions, and removing statistical signatures that AI detectors look for. Your meaning and citations are preserved.

Academic mode maintains formal tone and vocabulary for essays and research papers. Casual mode creates conversational, blog-friendly content. Professional mode produces polished business writing. SEO mode preserves keywords and structure while humanizing for search engine compliance.

Our Multi-Detector Simulator tests against 10+ detectors including Turnitin, GPTZero, Originality.ai, Copyleaks, ZeroGPT, Writer.com, and more. We show you exactly which detectors pass your content and which don't, so you can make adjustments before submitting.

Yes. Our Citation Preserver has 98.5% accuracy across APA, MLA, Chicago, and Harvard styles. It identifies in-text citations and reference entries, protects them during humanization, and ensures they remain perfectly formatted in the output.

Batch Humanization lets you process up to 25 documents simultaneously. Upload multiple essays, articles, or reports, select a mode, and humanize them all in a single pass. This is a premium feature designed for agencies and content teams.

Yes — our Chrome extension lets you humanize text directly in Google Docs, Microsoft Word Online, WordPress, and any web text field. No copy-pasting required. The extension is included with a premium subscription.

Our AI Content Detector analyzes text and estimates the probability it was generated by an AI model. It checks for perplexity (word predictability), burstiness (sentence variation), and stylometric fingerprints. Free tier allows 500 words per check, 3 times per day.

The AI Writing Checker provides a percentage score indicating how AI-like your text reads, along with a breakdown of which sections triggered detection signals. It highlights specific sentences that need revision, making it easy to manually adjust flagged passages.

The Basic Plagiarism Checker scans your text against publicly available web content to identify potential plagiarism. It compares your writing against online sources and reports similarity scores. Free tier allows 3 checks per day.

The Advanced Humanizer is our trial tool that offers mode selection (Academic, Casual, Professional, SEO) with enhanced rewriting depth. You get 1 free use to test it. Full access requires a premium subscription for unlimited use.

AI Detector Pro provides detailed detection reports with sentence-level analysis, confidence scores, and multi-detector simulation. It shows exactly which sentences trigger AI flags and why — covering perplexity, burstiness, and stylometric signals. You get 1 free detailed report.

The Multi-Detector Simulator runs your text against 10+ AI detectors simultaneously — including Turnitin, GPTZero, Originality.ai, Copyleaks, ZeroGPT, and Winston AI — and shows pass/fail results for each. This lets you verify your humanized text before submission. Premium feature.

The Tone-Specific Humanizer goes beyond the 4 standard modes with granular control over tone, reading level, and style. You can target specific grade levels (high school, university, graduate), adjust formality, and match a specific writing voice. Premium feature.

The Grammar + Humanize Combo fixes grammar, spelling, and punctuation errors while simultaneously humanizing your text. This is ideal for non-native English speakers whose writing may otherwise trigger false positives on AI detectors due to predictable sentence patterns. Premium feature.

The AI Citation Preserver is a dedicated tool that identifies and protects APA, MLA, Chicago, and Harvard citations during humanization. It recognizes in-text citations, parenthetical references, footnotes, and bibliography entries, ensuring they remain perfectly formatted in the output. Premium feature.

Free tier: 200 words per attempt, 3 times per day. Premium: unlimited word count per attempt. Batch Humanization supports up to 25 documents of any length simultaneously. The Multi-Detector Simulator accepts up to 5,000 words per check.

Currently, HumanAI is optimized for English. We are developing support for Spanish, French, German, Portuguese, and Hindi. Multilingual humanization is complex because each language has different perplexity baselines and detector calibration. Join our newsletter for updates on language support.

Yes. Our Chrome extension integrates directly with Google Docs, Microsoft Word Online, WordPress editors, email composers, and any web-based text field. Simply highlight text and click the HumanAI button to humanize in place — no copy-pasting needed.

Our AI Content Generator creates original, human-like content from scratch — not from AI prompts. It produces text that already has natural perplexity and burstiness patterns, reducing the need for post-generation humanization. Available as a premium feature.

Yes. After humanizing, you can copy the output directly, download it as a .txt file, or — for premium users — export to .docx format. Batch Humanization results can be downloaded as a ZIP file containing all processed documents.

Perplexity measures how "surprised" a language model is by each word in a sequence. AI-generated text has low perplexity because models select statistically likely words. Human writing has higher perplexity because people make unexpected word choices. Detectors flag low-perplexity text as likely AI-generated. Humanizers raise perplexity by replacing predictable words with contextually appropriate but less obvious alternatives.

Burstiness measures variance in sentence length and complexity. Human writing is "bursty" — a 4-word sentence next to a 38-word one. AI writing is uniform, with sentences clustering around 20-30 tokens. Low burstiness is one of the strongest AI signals. Humanizers add burstiness by deliberately varying sentence length, splitting long sentences, and merging short ones.

GPTZero and similar detectors analyze two core signals: perplexity (word predictability) and burstiness (sentence variation). They compare your text against statistical baselines for human and AI writing. A classifier model trained on millions of labeled examples produces a probability score. GPTZero was one of the first to formalize burstiness as a detection signal.

Turnitin uses a trained classifier on labeled AI and human text, analyzing perplexity, burstiness, and stylometric fingerprints specific to models like GPT-4, Claude, and Gemini. It recognizes model-specific patterns such as characteristic transition phrases ("Furthermore," "Moreover"), argumentation structures, and paragraph opening habits. In August 2025, Turnitin added AI Bypasser Detection that flags the fingerprint humanizers leave behind.

Stylometric fingerprinting identifies characteristic stylistic patterns of specific AI models. For example, GPT-4o tends to start body paragraphs with "Furthermore" or "Moreover," uses hedging language like "it is important to note," and concludes with "In summary" or "In conclusion." Detectors train on these fingerprints as additional signals on top of perplexity and burstiness.

Detectors measure statistical properties of text, not authorship. Formulaic writing (lab reports, legal documents, technical docs) has low perplexity by design. Non-native English speakers use more conventional syntax, which looks predictable. A Stanford study found 61.22% of TOEFL essays by non-native speakers were falsely flagged as AI. Even careful human editing can make text appear more "AI-like."

No. Multiple studies confirm AI detectors are biased against non-native English writers. A landmark Stanford study by Liang et al. (2023) found 61.22% of TOEFL essays by non-native speakers were falsely flagged as AI-generated — the highest documented false positive rate for any detection technology. This is because ESL writing tends to use conventional syntax and predictable vocabulary, which mimics AI patterns.

Paraphrasing tools like QuillBot swap synonyms and reorder clauses — they barely dent modern detectors because the sentence skeleton and statistical properties remain intact. True humanizers restructure the underlying rhythm of writing: varying clause order, changing paragraph flow, and breaking statistical fingerprints. Deep structural rewriting passes detectors far more often than surface-level word-swapping.

Partially. Research shows many existing detectors fail to catch well-humanized text, but the gap is narrowing. Turnitin's August 2025 AI Bypasser Detection specifically flags the fingerprint humanizers leave behind as a second red flag. Simple synonym-swapping gets caught often; deep structural rewriting less so. No humanizer offers a permanent or guaranteed bypass — it is an ongoing cat-and-mouse game.

In August 2025, Turnitin launched AI Bypasser Detection — a secondary analysis that looks for the specific fingerprints left by humanizer and paraphrasing tools. Instead of just checking if text looks AI-generated, it checks if text looks like it was run through a humanizer. This means one piece of text can now trigger two red flags instead of one.

Each detector uses different training data, models, and thresholds. Some rely more on perplexity, others on burstiness or stylometric analysis. A 2025 study found that even the same text from the same LLM produced different AI scores across detectors. Originality.ai and Turnitin use different classifiers calibrated on different datasets, so results vary significantly.

Zero-shot detectors like DetectGPT don't need training data. They use the source model's own probability estimates to determine if text was machine-generated. DetectGPT works by perturbing the text slightly (masking and refilling spans), then measuring how much the log-probability drops. Machine text sits near a local maximum, so it drops more than human text. Fast and transparent but model-dependent.

DetectGPT computes the log-probability of the original text under a language model, then perturbs the text by masking and refilling spans. It measures the drop in log-probability. Machine-generated text tends to sit near a local maximum of the model's probability surface, so perturbations cause a larger drop. Human text, already off-peak, drops less. This curvature-based approach is more sophisticated than raw perplexity scoring.

Turnitin claims a 1-2% false positive rate, but independent studies place it higher — especially for non-native English speakers, neurodivergent students, and formulaic writing. A 2025 study found Originality.ai achieves 69% overall accuracy and Turnitin 61%. OpenAI shut down its own AI Classifier in July 2023 due to a 26% detection rate and 9% false positive rate. No detector is reliable enough to serve as sole evidence.

Unlikely. Google Research published a paper (Sadasivan et al., 2023) arguing that as LLMs improve, reliable detection becomes theoretically impossible because AI text converges toward the human text distribution. The overlap between human and AI writing is a fundamental statistical problem, not a calibration issue. The cat-and-mouse game between detectors and humanizers will continue indefinitely.

HumanAI is freemium. Free tier: 4 tools with daily limits (3 uses/day), no signup required. Premium: $9.99/month for unlimited access to all 15 tools, including unlimited humanization, batch processing, multi-detector simulation, citation preservation, browser extension, and API access.

Yes. You can cancel your subscription at any time from your account settings. You'll retain access to premium features until the end of your billing period. No cancellation fees, no questions asked.

We offer a 7-day money-back guarantee. If you're not satisfied within your first 7 days, contact us at support@toolly.site for a full refund. After 7 days, refunds are handled case-by-case.

Our $9.99/mo price is already optimized for students — it's lower than most competitors ($14.99-$29/mo). We also offer a free tier that covers many student needs (200 words per humanization, 3 times per day).

Yes. API Access is included with premium subscriptions. You can integrate HumanAI into your content pipeline for bulk processing. Rate limits scale with your plan. Contact admin@toolly.site for enterprise pricing.

The free tier includes 4 tools with daily limits: AI Humanizer (200 words/attempt, 3/day), AI Content Detector (500 words, 3/day), AI Writing Checker (3/day), and Basic Plagiarism Checker (3/day). You also get 1 free trial use of the Advanced Humanizer and 1 free AI Detector Pro report. No signup required.

Premium ($9.99/mo) includes: unlimited humanization with all 4 modes, Batch Humanization (up to 25 docs), AI Detector Pro with detailed reports, Multi-Detector Simulator (10+ detectors), Tone-Specific Humanizer, AI Citation Preserver, Grammar + Humanize Combo, Chrome browser extension, API access, and the AI Content Generator. No word limits.

Yes. Annual billing is $89.99/year (a 25% savings versus monthly). This includes all premium features. We also offer a one-time Word Pack ($9 for 50,000 words) that never expires, ideal for users who need a burst of processing without a recurring subscription.

Yes. You can switch between monthly and annual plans at any time from your account settings. Upgrades take effect immediately. Downgrades take effect at the end of your current billing cycle. No fees for plan changes.

Yes. For teams of 5+ users, we offer discounted per-seat pricing with centralized billing and admin dashboard. Enterprise plans include custom rate limits, dedicated support, SLA guarantees, and on-premise processing options. Contact admin@toolly.site for a custom quote.

We accept all major credit cards (Visa, Mastercard, American Express, Discover), debit cards, and PayPal. All payments are processed securely through Stripe. We never see or store your card details. Cryptocurrency payments are planned for the future.

No. Premium subscribers get unlimited word counts on all humanization tools. The Multi-Detector Simulator accepts up to 5,000 words per check. Batch Humanization supports up to 25 documents per batch with no per-document word limit. API access includes generous rate limits that scale with your usage.

No. This is our core promise: text you submit to any tool is processed in-memory and immediately discarded. We do not retain, log, or share your submitted content. Your words stay yours.

Your text is sent to our AI processing provider (OpenAI) via encrypted connection for real-time processing. OpenAI does not retain your text beyond the processing window, and it is never used for model training. We never share your content with any other third party.

We collect minimal data: usage frequency (pages visited, tools used), technical data (browser type, IP address for rate limiting), and account data for paid subscribers (email, subscription status). Payment processing is handled securely by Stripe — we never see your card details.

Yes. We comply with GDPR, CCPA, and other privacy regulations. You have the right to access, rectify, erase, restrict, port, and object to processing of your personal data. Contact privacy@toolly.site to exercise any of these rights.

No. Your submitted text is never used to train any AI model — not ours, not OpenAI's, not any third party's. Text is processed in real-time and immediately discarded. This is a critical privacy guarantee that distinguishes us from competitors with unclear data retention policies.

All payments are processed through Stripe, a PCI DSS Level 1 certified payment processor. We never see, store, or have access to your credit card details. Stripe handles all payment data securely. Your billing information is encrypted and stored only in Stripe's secure infrastructure.

We use minimal cookies: a theme preference cookie (light/dark mode), a session cookie for authenticated users, and analytics cookies to understand aggregate usage patterns. We do not use advertising cookies or sell data to third parties. You can manage cookies in your browser settings.

Yes. You can delete your account at any time from your account settings. This permanently removes your email, subscription data, and usage history. Since we never store your submitted text, there is no text data to delete. Account deletion is immediate and irreversible.

Yes. We designed HumanAI with privacy as the top priority. Your text is processed in-memory and never stored. We do not log content, share it, or use it for training. For enterprise clients with extra-sensitive needs, we offer on-premise processing options. Contact admin@toolly.site for details.

Our servers are located in the United States (East Coast) and Europe (Frankfurt). API processing is routed to the nearest available datacenter for lowest latency. All data in transit is encrypted via TLS 1.3. Enterprise clients can request data residency in specific regions for compliance.

Our Multi-Detector Simulator tests your text against Turnitin and 9+ other detectors before you submit. We show you exactly which detectors pass and which don't. However, we encourage ethical use — use AI as a writing assistant, not to deceive instructors.

Yes. Our Citation Preserver is specifically designed to keep APA, MLA, Chicago, and Harvard citations perfectly formatted during humanization. Unlike other humanizers that break references, we protect them.

AI ethics in academia is still evolving. We believe AI is a legitimate writing assistant — similar to Grammarly or spell-check. We encourage you to use HumanAI to improve your writing, not to misrepresent AI-generated work as entirely your own. Always follow your institution's AI policies.

Free tier allows 200 words per attempt (3 times per day). For longer documents, premium subscription offers unlimited word counts. You can also use Batch Humanization to process multiple sections at once.

A growing number of universities have prohibited or disabled AI detectors, including University of Waterloo (September 2025), Washington State University (February 2026), UC-Berkeley, Vanderbilt, Johns Hopkins, Indiana University, Northwestern, Georgetown, NYU, and others. Many cite unreliability, false positives, and bias against non-native English speakers.

It depends. Turnitin's August 2025 AI Bypasser Detection specifically looks for humanizer fingerprints. However, studies show humanizers are increasingly effective at evading detection. The bigger risk is often the quality of the writing itself — if the output reads differently from your normal writing style, a professor may notice the discrepancy manually.

If falsely accused, gather evidence of your writing process: draft history, version history in Google Docs, notes, outlines, and earlier assignments showing your writing style. Studies show 33% of academic integrity cases based solely on AI detection lead to "not responsible" findings. Many universities now prohibit AI detectors as sole evidence. Always appeal and request human review.

Yes. Academic mode is specifically calibrated for research papers — it maintains formal tone, preserves technical vocabulary, and keeps citations intact. The Citation Preserver ensures APA, MLA, Chicago, and Harvard references remain perfectly formatted. This is a common use case for graduate students and academics.

Yes, but we strongly recommend using it ethically. If you use AI to help draft sections of your dissertation, humanizing them to avoid detection without disclosing AI use may violate your university's academic integrity policy. We recommend using HumanAI to improve readability and flow of your own writing, not to disguise AI-generated content as original work.

Most style guides now have AI citation formats. APA: "In-text (OpenAI, 2024)" with full reference. MLA: Include AI tool name, version, publisher, and date. Chicago: Footnote with tool name and date. Always check your institution's specific AI policy. Disclosing AI use is increasingly the safest approach.

A landmark 2023 study by Liang et al. at Stanford University found that AI detectors falsely flagged 61.22% of TOEFL essays written by non-native English speakers as AI-generated. This is the highest documented false positive rate for any AI detection technology. The study highlighted that detectors effectively measure English fluency, not authorship — a fundamental flaw that has driven many universities to abandon AI detectors.

Yes. Our Citation Preserver supports all four major citation styles with 98.5% accuracy. It recognizes in-text citations, parenthetical references, footnotes, endnotes, and bibliography entries in each format. During humanization, these elements are identified, protected, and output in their original format.

No. Google has stated consistently since February 2023 that AI-generated content is not penalized for being AI-generated. Google's spam policy targets content produced "primarily to manipulate search rankings," regardless of whether it's AI or human-written. An Ahrefs study of 600,000 pages found a correlation of 0.011 between AI content percentage and ranking position — effectively zero.

No. There is no Google system that detects "humanized" text and applies a penalty. Google scores helpfulness, not authorship. Humanizing a bad article makes it a better-sounding bad article — it doesn't fix underlying quality issues. Google's January 2025 Search Quality Rater Guidelines assign the lowest rating to low-effort AI content regardless of how human it sounds.

Google's Helpful Content system (launched August 2022, merged into core ranking in March 2024) evaluates whether content exists to serve readers or to manipulate rankings. It scores pages site-wide on signals like topical depth, originality, citations, author signals, and first-hand experience. AI content is judged on quality, not production method. Scaled, thin content triggers suppression regardless of authorship.

Scaled content abuse is Google's term for producing large volumes of content primarily for ranking purposes. Introduced in March 2024, it explicitly names generative AI as one method of scaling abuse — but human-written mass content is equally guilty. The test is intent and value, not tooling. A single well-researched AI-assisted article is fine; 500 unedited AI outputs targeting long-tail keywords are spam.

Yes. Our SEO mode is specifically designed for content marketing. It preserves target keywords, maintains heading structure, and keeps meta-relevant phrases intact while humanizing the prose. This helps your content read naturally without losing SEO signals. However, ensure your content adds genuine value — humanizing thin content won't help rankings.

Humanizing alone won't improve rankings — Google doesn't score for "humanness." What helps is that humanized content tends to read better, which can improve dwell time, reduce bounce rate, and earn natural backlinks. The real ranking factors are originality, depth, citations, author authority, and user value. Humanizing supports these indirectly by making content more engaging.

Yes. In SEO mode, our engine identifies and protects target keywords, LSI terms, and semantic variations. It humanizes the surrounding prose while keeping keyword density and placement intact. This ensures your content maintains its search relevance while reading naturally.

E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) is about content quality, not production method. AI content can hurt E-E-A-T if it lacks first-hand experience, verifiable sources, or author attribution. To maintain E-E-A-T with AI-assisted content: add personal insights, cite real sources, include a visible author byline with credentials, and ensure factual accuracy. HumanAI's SEO mode helps text read naturally, but E-E-A-T requires human-added value.

Undetectable AI ($9.99-$49.99/mo) is the market leader but has no API, unclear data retention policies, and a Trustpilot rating below 3.0/5 with complaints about billing issues and output quality. HumanAI offers the same core humanization at $9.99/mo with a clear no-storage privacy policy, API access included, citation preservation, and 4 specialized modes. We also offer a free tier with no signup.

WriteHuman ($18-$29/mo) has a clean interface and Chrome extension but offers only one humanization mode with no intensity control. Their API has been "coming soon" since early 2026 with no ship date. HumanAI offers 4 modes, intensity control, API access that's live today, citation preservation, and a built-in multi-detector simulator — all at a lower price point.

ToHuman (free tier with 2,500 words/mo, Pro $19/mo) is API-first with a fine-tuned Mistral 7B model and no external AI API calls. It's a strong developer-focused tool. HumanAI differentiates with 15 tools (vs. ToHuman's focus on humanization alone), a built-in multi-detector simulator, citation preservation, 4 humanization modes, a browser extension, and a lower premium price ($9.99 vs. $19/mo).

StealthGPT ($14.99-$29/mo) uses GPT-based rewriting and offers "stealth levels" but tends to produce overly informal, stilted output that can be spotted on manual review. HumanAI offers more natural output across 4 tone modes, citation preservation (which StealthGPT lacks), a multi-detector simulator, and a lower starting price.

QuillBot ($8.33/mo) is a paraphrasing tool, not a true humanizer. It swaps synonyms and reorders clauses but doesn't change the statistical properties that detectors analyze. Research confirms paraphrasing barely dents modern detectors. HumanAI performs deep structural rewriting that changes perplexity and burstiness — the actual signals detectors measure. If you need to pass AI detectors, QuillBot won't help.

We optimize for volume and retention. Our $9.99/mo price is designed to be accessible to students and individual creators. We make up the margin through higher subscriber counts and our broader tool ecosystem (15 tools vs. competitors' 1-3). We also don't spend heavily on advertising — organic growth through the Toolly network keeps our customer acquisition costs low.

The most frequent complaints about competitors are: (1) Grammar butchering — synonym replacement without context produces garbled text. (2) Broken citations — APA/MLA references get destroyed during rewriting. (3) False bypass claims — tools claim 97% bypass rates but fail 8 of 10 detectors. (4) Word count limits — free versions cap at 250 words while essays run 3,000+. (5) Difficulty canceling subscriptions with unexpected charges. (6) Unclear data storage policies.

Yes. HumanAI is the only platform that combines: (1) Citation preservation across 4 styles (competitors break citations). (2) Built-in multi-detector simulation against 10+ detectors. (3) 4 specialized humanization modes. (4) Grammar + Humanize combo for ESL writers. (5) A free tier with no signup required. (6) Clear no-text-storage privacy guarantees. (7) 15 integrated tools in one platform.