Detect AI, write naturally, polish your prose, verify research — all powered by our exclusive 0–100 Authenticity Score on every output.
Twenty free tools organised into four product families. Every output — from the detector verdict to a Grammar fix to a paraphrase pass — ships with the same 0–100 Authenticity Score so you can compare across tools without recalibrating in your head.
The detector family. Sentence-level highlighting, multi-model coverage across GPT, Claude, Gemini, Llama, and Mistral, plus model attribution that tells you which family wrote each section. PDF, DOCX, URL, and raw-paste inputs all run through the same pipeline.
The AI Rewriter family. Closed-loop rewrite that iterates until the result reads under 35% AI across five reference detectors, three tone presets (Conversational, Professional, Academic), and fact-locking on numbers, names, dates, and citations so meaning never drifts during the rewrite.
Grammar, spelling, readability, paraphrase, summarize, and tone-shift tools — each grounded in the same Authenticity Score so a polish pass is measurable, not vibes-based. Compare two drafts side by side and watch the score move as you edit.
Plagiarism risk, citation finder, fact-extract, and one-click summary tools for editors validating research-heavy drafts. Plagiarism risk is a style-fingerprint signal, not a web crawler — useful as a yellow flag before sending a piece to a paid Copyscape or Turnitin check.
Every sentence gets its own confidence score, color-coded right inside your text. No more guessing what an "87% AI" verdict actually means or which paragraph to rewrite.
0–100, calibrated against the AI detectors that grade your work — Originality, GPTZero, Copyleaks, Winston, Turnitin. Higher = more human. Watch the number move as you accept rewrite suggestions.
Most detectors leave you stranded with a percentage. We hand you the rewrite. Click Apply and the score climbs in real time. Reject any one and we'll try a different angle.
Every model leaves fingerprints — vocabulary, sentence rhythm, transition phrases. We fingerprint them at training time and surface the attribution alongside the verdict.
Plagiarism checker, paraphraser, summarizer, fact-checker, citation generator, grammar, readability, word counter… 20 tools that play nicely with the detector — and with each other.
Flags passages that may look sourced, generic, over-paraphrased, or citation-risky — based on style and specificity patterns, not a web search. Different from Turnitin or Copyleaks; built for the writing-quality signal, not the database hit.
Note: Not a web-index plagiarism checker. For institutional plagiarism review (Turnitin, Copyleaks), use a dedicated service.
Industry-standard readability metrics on every scan: Flesch-Kincaid grade level, sentence complexity, and clarity suggestions. Find the spots where your readers stumble — and rewrite for the audience you actually have.
Every tier gets the same detection engine, the same Authenticity Score, and the same integrations. Higher tiers raise volume caps and add API access, but the core feature set is identical from Free through Business.
Colour-coded every sentence so you can see which lines triggered the AI flag, which read as mixed, and which read as fully human. Sentence highlights show you exactly where to focus a rewrite, and they ship on every plan including Free.
A single number you can interpret in two seconds. Five plain-English bands: Original, Mostly Human, Mixed, Likely AI, AI Generated. The same score appears on detection scans and on every AI rewriter rewrite, so you can track improvement run over run.
Trained on all five major families: OpenAI GPT-3.5/4/4o, Anthropic Claude 3 and 3.5, Google Gemini, Meta Llama 3, and Mistral. New model versions are added to the training set as they ship — never calibrated only on GPT.
Right-click any selected text on any website and scan inline. Works on Gmail drafts, Google Docs, Notion, LMS portals, X and LinkedIn composer. No copying into a separate tab — matters when you check 20 pieces a day.
Scan posts inside the WP block editor before you hit publish. Adds a sidebar panel with detection score, sentence breakdown, and a one-click AI rewriter for flagged passages. Built for editors handling contributor submissions and SEO teams shipping at volume.
JSON endpoints for scan, rewrite, paraphrase, summarize, grammar check, plagiarism risk. Streaming SSE on rewrite and summarize for low-latency UI. Transparent rate limits documented at api-docs.
The stuff most marketing pages skip. Here it is.
AI Rewriter & writing tools cover 50+; the top 18 are fully supported, others in beta. AI detection is tuned for English.
For a single 5,000-char scan. Bulk endpoint streams results as sentences finish.
Your text is discarded the moment we return the verdict. Never stored, never used to train.
Detect, rewrite, and score via JSON. Sample code for Python, Node, PHP, Ruby, Go.
Paste, .txt, .md, .docx, .pdf, or URL. Up to 25,000 characters on Pro+, batch via API.
Google Docs, Microsoft Word, Notion, WordPress, Shopify, Canvas LMS, Slack, Zapier.
Four tiers. The decision usually comes down to weekly scan volume, whether you need API access, and whether the AI rewriter is a daily tool or an occasional rescue.
3 scans/day, sentence highlights, Authenticity Score, 10,000 character lifetime AI rewriter trial.
Start freeBilled $89.88/year — Save $30
20 scans/day, 20,000 AI rewriter words/month, Chrome extension, plagiarism risk indicator.
Choose StarterBilled $179.88/year — Save $60
Unlimited scans, 50,000 AI rewriter words/month, file plus URL upload, priority support.
Choose ProBilled $359.88/year — Save $120
100,000 AI rewriter words/month, REST API access, 5 team seats, white labelled PDF reports, bulk scan.
Choose BusinessAnnual billing saves 25%, dropping Pro to $14.99/mo and Business to $29.99/mo. Full pricing →
Start free with 3 scans/day. No credit card required.