Grammarly Authorship writing-process record
Vendor Grammarly Official site grammarly.com/authorship How this card is sourced
Updated · AI Detector Index editors
Grammarly Authorship keeps the writing-process data behind a report on Grammarly's servers "for up to 10 years", per the vendor's Introducing Authorship support article (support.grammarly.com, read 9 November 2026). Authorship is a process-evidence tool, not a classifier: it records whether each sentence in a document was typed, pasted from a website, pasted from a generative AI source or produced by Grammarly's own AI while the document is being written, and it returns no probability score for a piece of text it did not watch being written (grammarly.com/authorship, read 9 November 2026). The card sits in the detector index because readers compare it with detectors, and how this card is sourced explains which of the fourteen fields a process record can fill.
What Grammarly Authorship records
| Field | Value | Source |
|---|---|---|
| Content types detected | Text | grammarly.com/authorship |
| Generators covered | ChatGPT (named as a generative AI source attributed from the clipboard), Claude (named as a generative AI source attributed from the clipboard), Grammarly's own generative AI and rephrasing, categorised separately from typed text, Any other generative AI site where the browser extension runs; a new AI tool may not yet be categorised as generative AI | support.grammarly.com/hc/en-us/articles/2... |
| Input limits | Tracks text typed, pasted or AI-assisted in the body of a Google Doc (Chrome or Edge extension), a Microsoft Word document (Windows or Mac desktop app) or Grammarly docs, where it runs automatically. Clipboard access is required to attribute pasted text; without it pasted text is categorised as copied from an unknown source. A 20-page limit applies in Microsoft Word, after which the tracked history may become unreliable. A writing session expires after 10 minutes of idle time. Text pasted from a private browsing window or, in Google Docs, from a desktop source is not attributed. No word limit is published. | support.grammarly.com/hc/en-us/articles/2... |
| Free tier | Authorship is available in Grammarly Free and Grammarly Pro. All plans, including Free, generate and share unlimited Authorship reports with Typed by a Human analytics and colour-coded text; Copied from a source analytics, including the percentage of text that was AI-generated, and AI and plagiarism detection inside the report need a paid plan | support.grammarly.com/hc/en-us/articles/2... |
| Integrations | Google Docs (Grammarly browser extension for Chrome and Edge), Microsoft Word (Grammarly desktop app for Windows and Mac), Grammarly docs and the Grammarly Editor (Authorship agent runs automatically), Canvas LMS submissions (product page), Superhuman Go (product page FAQ), Grammarly for Education admin panel, Authorship Analytics tab | grammarly.com/authorship |
| Data retention | Support article (Introducing Authorship): When you click See report on the thumbprint icon in Google Docs or Microsoft Word, Authorship data for the current document is sent to our servers over an encrypted TLS connection for processing. The data remains on our servers for up to 10 years. When you share your Authorship report with others, such as an instructor or editor, the report data for that document is sent to our servers and stored on our servers until you delete your account. You can delete this report data at any time by clicking the trash bin icon for the respective document. Privacy Policy (effective July 6, 2026): We retain personal data for as long as necessary to provide our products to you, to complete the transactions you have requested, to comply with our legal obligations, to resolve disputes, and for other legitimate business purposes. | support.grammarly.com/hc/en-us/articles/2... |
| Ownership | Grammarly; the grammarly.com footer reads 2026 (c) Superhuman Platform and the Company menu lists Superhuman and GPTZero, while the support centre footer reads (c) Grammarly Inc. Authorship is a process-evidence feature of the Grammarly writing assistant, not a classifier: it records where text in a document came from and returns no probability score for arbitrary pasted text. | grammarly.com/authorship |
The product page states the difference in the vendor's own words: "AI detectors only guess from the final draft. Authorship records your actual writing process" (grammarly.com/authorship, read 9 November 2026). The FAQ on the same page adds that AI detectors "don't keep track of document history; they just analyze your text in a moment in time", while Authorship "identifies if sentences were written by you or came from a website, a Grammarly suggestion, or a non-web source". The support article lists the categories the record distinguishes: text typed directly into the document, text pasted from a browser-based source, text pasted from an unknown source such as a private browsing window, AI-generated text, and text typed by the user and then modified with Grammarly's on-demand AI rephrasing or its non-generative corrections (support.grammarly.com, read 9 November 2026).
Attribution depends on clipboard access. "With clipboard access, Authorship can determine whether text was copied from a generative AI source such as ChatGPT or Claude, or from a more traditional online source such as Wikipedia"; without it, pasted text can only be categorised as "copied from an unknown source" (same article, read 9 November 2026). The generators field on this card therefore names ChatGPT and Claude as the two sources the vendor itself names, and the vendor warns that "text pasted from a new AI tool that has yet to be categorized as generative AI" may be missed. Authorship runs in Google Docs through the Chrome and Edge extension, in Microsoft Word through the desktop app for Windows and Mac, and automatically in Grammarly docs; the product page also names Canvas LMS submissions and Superhuman Go. The LMS angle is covered on AI detectors with LMS integrations.
Ownership reads two ways on the vendor's pages: the grammarly.com footer says "2026 (c) Superhuman Platform" and its Company menu lists Superhuman and GPTZero, while the support centre footer says "(c) Grammarly Inc." (both read 9 November 2026). The sibling cards are Grammarly's AI Detector, the classifier from the same vendor, and Turnitin Clarity, the other process-evidence tool on the register.
Limits and plans
| Plan | Price | Limits | Checked on |
|---|---|---|---|
| Free | $0 USD / month | Basic Authorship tracking in Google Docs and Microsoft Word; unlimited Authorship reports and shares; Typed by a Human analytics and insight cards; colour-coded report text. Detect AI generated text is marked Unavailable on the plans page. | |
| Pro (annual) | $12 USD / member / month, billed annually | Everything in Free; Copied from a source analytics including the percentage of AI-generated text; Copied from a source insight cards with the specific text; AI and plagiarism detection within Authorship reports; detailed attribution for external sources including desktop applications in Microsoft Word. | |
| Pro (monthly) | $30 when billed monthly | Same as Pro (annual). | |
| Enterprise and Grammarly for Education | Contact sales; Enterprise is available through Superhuman Go. Accounts bought through Sales get tracking, unlimited reports, detailed attribution and AI and plagiarism checks; Education admins see aggregated Authorship Analytics (text typed, copied from a website, AI-generated, top 10 external sources) in the admin panel. K-12 admins must ask their Customer Success Manager to turn Authorship on. |
The support article sets the operating limits. There is "a 20-page limit for Authorship in Microsoft Word", after which "the tracked history may become unreliable"; a writing session "expires after 10 minutes of idle time"; and the report "concerns only text that appears in the body of the document" (support.grammarly.com, read 9 November 2026). Text pasted from a desktop source into Google Docs, or from a private browsing window anywhere, is not attributed. No word limit is published, so the input limits field carries these conditions instead of a count.
Authorship "is available in Grammarly Free and Grammarly Pro" (product page FAQ, read 9 November 2026). The support article splits the feature by plan: every plan, Free included, can "generate an unlimited number of Authorship reports", share them, and see "Typed by a Human" analytics and insight cards; paid subscribers also see "Copied from a source" analytics "including the percentage of text that was AI-generated" and the specific text from an AI-generated source. Prices below are as displayed, read 9 November 2026.
Retention is the longest stated period on the register as of 9 November 2026 in the data file, where Hive's 14 days was the previous maximum. "When you click See report", the document's Authorship data "is sent to our servers over an encrypted TLS connection for processing. The data remains on our servers for up to 10 years." A shared report is "stored on our servers until you delete your account", and the user can delete report data "at any time by clicking the trash bin icon" (support.grammarly.com, read 9 November 2026). The Privacy Policy effective July 6, 2026 adds the general rule that Grammarly retains personal data "for as long as necessary to provide our products to you" (grammarly.com/privacy-policy, read 9 November 2026). The card's retention rank field takes the 10-year clause as 3,650 days.
What the vendor claims
AI detectors only guess from the final draft. Authorship records your actual writing process so you'll always have receipts. (Product page, read 2026-11-09.) No accuracy rate is published: Authorship is a record of typed, pasted and AI-assisted text, and it returns no probability score for text it did not watch being written.
Grammarly publishes no accuracy rate for Authorship, and the card records why: the product makes no accuracy claim because it does not classify. The vendor's statement of value is "Prove how hard you worked" and "so you'll always have receipts" (product page, read 9 November 2026). The nearest thing to a performance statement is a limitation: "While Authorship is generally available, it may not capture 100% of cases accurately. There may be cases where keystrokes are typed too fast for Authorship to pick them up, cases where text is pasted from a desktop source where Authorship does not run, or instances where text was pasted from a new AI tool that has yet to be categorized as generative AI" (support.grammarly.com, read 9 November 2026).
The vendor's caveats are about consent and exposure rather than error rates. "Authorship is an opt-in feature and will not track text sources without your consent" (product page FAQ, read 9 November 2026). The report and its replay include "parts you have deleted from the latest version, and the names of websites you may have used while editing", so the support article recommends "logging out before letting others use your device, especially on a shared device such as a school or library computer". A report that shows every deleted sentence is evidence of a different kind from a percentage, which is the point of the card.
What independent studies found
No record in the studies index tested Grammarly Authorship, and none could have in the usual way: the indexed studies submit finished documents to a tool and count verdicts, and Authorship issues no verdict on a finished document it did not observe. The study count is zero, the false positive and false negative fields are empty, and the robustness field is empty, read 9 November 2026 in the data file.
The one classifier from the same vendor, Grammarly's AI Detector, also has no indexed study record as of 9 November 2026, so the two Grammarly cards share an empty evidence column for different reasons.
Where Grammarly Authorship appears in the index
Rankings
Fits these use cases, questions and comparisons
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Grammarly Authorship appears in one ranking, AI detectors ranked by data retention, on the stated 3,650 days from the "up to 10 years" clause (support.grammarly.com, read 9 November 2026). It is absent from the study-based rankings, which need at least one indexed record, from the free tier ranking, which sorts on words per month, and from the language ranking, which needs a published count.
The card also appears on AI detectors with LMS integrations for the Canvas LMS submission path the product page names. Every detector card on the register shows the same fourteen fields, so a reader can set a process record's empty score columns beside the percentages the classifiers publish.
Questions about Grammarly Authorship
Is Grammarly Authorship an AI detector?
No. Authorship records how text entered a document, typed, pasted or AI-assisted, while it is being written, and returns no probability score for arbitrary text; the vendor's own page says "AI detectors only guess from the final draft", read 9 November 2026.
Is Grammarly Authorship free?
Yes, with limits: Free accounts generate and share unlimited Authorship reports with Typed by a Human analytics, while the AI-generated percentage and AI and plagiarism detection inside reports need Pro at $12 USD per member per month billed annually or $30 monthly, read 9 November 2026.
How long does Grammarly keep Authorship data?
Up to 10 years for a document's Authorship data once a report is generated, and until account deletion for a shared report, with a trash bin control to delete report data at any time, per the support article read 9 November 2026.
Can a school see an Authorship report without the student sharing it?
No. The product page FAQ states the student must create the report, make the link shareable and send it to a specific recipient; Education admins see only aggregated analytics, read 9 November 2026.
Which AI sources does Authorship recognise?
The support article names ChatGPT and Claude as generative AI sources it attributes when clipboard access is granted, and warns that a new AI tool may not yet be categorised, read 9 November 2026.
Sources and revisions
Sources
- grammarly.com/authorshipRead 9 November 2026
- support.grammarly.com/hc/en-us/articles/2...Read 9 November 2026
- grammarly.com/proRead 9 November 2026
- grammarly.com/plansRead 9 November 2026
- grammarly.com/privacy-policyRead 9 November 2026
