Walter Writes AI detector
Vendor Walter AI Inc. Official site walterwrites.ai/ai-detector How this card is sourced
Updated · AI Detector Index editors
Walter Writes AI Detector offers a free 300-word trial with no credit card required, according to the Walter Writes home page (walterwrites.ai, read 8 November 2026). The vendor is Walter AI Inc., 410 rue Saint-Nicolas, suite 236, Montreal (Quebec) H2Y 2P5, Canada, per the terms of service last updated 26 October 2026 (walterwrites.ai/terms-of-service/, read the same day); the privacy policy names Walter Writes AI Inc, and the card uses the more recent terms. To see Walter Writes beside the other twenty-one cards, start from the full table. How this card is sourced.
What Walter Writes detects
| Field | Value | Source |
|---|---|---|
| Content types detected | Text, image, voice | walterwrites.ai/api |
| Generators covered | ChatGPT (GPT-3, GPT-4, GPT-5), Claude (Anthropic), Gemini (Google), Llama (API testing) | walterwrites.ai/ai-detector |
| Languages | English, Spanish, French, German, Portuguese (20 listed) | walterwrites.ai/ai-detector |
| Input limits | Web app: 750 words/request (Starter), 1,500 words/request (Pro), 2,000 words/request (Elite and Teams). Text API per-request limit not published. Image API: JPEG, PNG, WebP, GIF, BMP, TIFF up to 10 MB. Voice API: WAV, FLAC, OGG, MP3, M4A, AAC up to 150 MB and 10 minutes. Text file types for the web detector not published. | walterwrites.ai/pricing |
| Free tier | Free 300-word trial, no credit card required (homepage); pricing FAQ defers to the Start free trial link for current limits. API: start on the free tier (size not published). | walterwrites.ai |
| API | Yes, docs.walterwrites.ai/api-reference/detector | docs.walterwrites.ai/api-reference/detector |
| Integrations | Chrome extension (Gmail, Google Docs, LinkedIn, Notion, Slack, ChatGPT, Claude), Walter MCP for Claude, Walter MCP for Codex, Free GPTs on ChatGPT, Zapier, Mobile app (iOS and Android), LMS via API (Canvas, Moodle, Schoology; native plugin not published) | walterwrites.ai/chrome-extension |
| Data retention | Privacy Policy (Last updated September 4, 2025): We will retain your personal information for as long as necessary to provide you with the Services you have requested, or for other essential purposes such as complying with our legal obligations, resolving disputes, and enforcing our policies. Walter Writes AI processes your text using our own self-hosted AI models. Specific retention period for submitted text not published. | walterwrites.ai/privacy-policy |
| Ownership | Walter AI Inc., 410 rue Saint-Nicolas, suite 236, Montreal (Quebec) H2Y 2P5, Canada (Terms of Service, Last Updated October 26, 2026; Privacy Policy names Walter Writes AI Inc and its affiliates). Parent company not published. | walterwrites.ai/terms-of-service |
Walter Writes AI Detector covers text in the web app, with image and voice detection available through the API, per the Walter Writes API overview (walterwrites.ai/api/, read 8 November 2026). For text, the detector page names ChatGPT (GPT-3, GPT-4, GPT-5), Claude (Anthropic) and Gemini (Google), with Llama listed for API testing (walterwrites.ai/ai-detector/, read 8 November 2026).
The detector page says 20+ languages and names five: English, Spanish, French, German and Portuguese. The homepage FAQ says over 80 languages for humanize and detect, and the detector FAQ refers to any English-language content; the card carries 20 from the detector page, because that is the product page for the detector, and notes that the 80+ figure covers the humanizer bundle (detector page and home page, read 8 November 2026).
The privacy policy, last updated 4 September 2025, says: "We will retain your personal information for as long as necessary to provide you with the Services you have requested, or for other essential purposes such as complying with our legal obligations, resolving disputes, and enforcing our policies." The same policy says text is processed on Walter Writes' own self-hosted AI models (walterwrites.ai/privacy-policy/, read 8 November 2026). Integrations are a Chrome extension, Walter MCP for Claude and for Codex, free GPTs on ChatGPT, Zapier, a mobile app on iOS and Android, and LMS access via the API for Canvas, Moodle and Schoology (walterwrites.ai/chrome-extension/, read 8 November 2026). Two related cards: Phrasly, which also bundles a detector with a humanizer, and Winston AI.
Limits and plans
| Plan | Price | Limits | Checked on |
|---|---|---|---|
| Starter (monthly) | $12 billed monthly | 30,000 words/month, 750 words/request. Every plan: advanced humanization engine, generate human-like text, built-in plagiarism checking, built-in AI detector, MCP server access, 80+ languages supported, watermark removal. | |
| Starter (annual) | $8 monthly, billed $96 annually | Same as Starter (monthly). | |
| Pro (monthly) | $23 billed monthly | 70,000 words/month, 1,500 words/request. | |
| Pro (annual) | $13 monthly, billed $156 annually | Same as Pro (monthly). | |
| Elite (monthly) | $47 billed monthly | 200,000 words/month, 2,000 words/request. | |
| Elite (annual) | $26 monthly, billed $312 annually | Same as Elite (monthly). | |
| Teams (monthly) | $139 billed monthly | 500,000 words/month, 2,000 words/request, 10 team members, top up words anytime. | |
| Teams (annual) | $99 monthly, billed $1188 annually | Same as Teams (monthly). | |
| API plans | 300K words / mo $49; 1M $129; 2M $229; 5M $479; 12M $899; 25M $1,699 | Most text endpoints use 1 credit per word; image detection at least 6 credits, capped at 17 credits at or above 4K UHD; voice 10 credits per audio second. Enterprise: talk to sales. |
The web app allows 750 words per request on Starter, 1,500 on Pro and 2,000 on Elite and Teams, per the Walter Writes pricing page read 8 November 2026. The image API accepts JPEG, PNG, WebP, GIF, BMP and TIFF up to 10 MB; the voice API accepts WAV, FLAC, OGG, MP3, M4A and AAC up to 150 MB and 10 minutes (API overview, read 8 November 2026).
Prices are from the Walter Writes pricing page read 8 November 2026, with the annual toggle marked "Save up to 45%"; the home page says "Save up to 43%", and the card uses the pricing page figure. Every plan bundles the detector with the humanizer and plagiarism checking. The free tier is a 300-word trial counted once: the detector page hero says "Free & unlimited checks", the home page says a free 300-word trial, and the pricing FAQ points to the current trial offer, so the card carries the only quantified statement (home page, read 8 November 2026).
What the vendor claims
No AI detector can guarantee 100% accuracy, but Walter Writes AI is one of the most reliable detection systems available. It combines linguistic analysis, probability scoring, and continuous model training to improve precision and reduce false positives. (No numeric accuracy figure published.)
Walter Writes says: "No AI detector can guarantee 100% accuracy, but Walter Writes AI is one of the most reliable detection systems available. It combines linguistic analysis, probability scoring, and continuous model training to improve precision and reduce false positives." On false positives, Walter Writes says: "Our AI detection engine minimizes false positives across models like ChatGPT, GPT-5, Claude, and Gemini, ensuring dependable results for educators, journalists, and professionals." Both statements are on the detector page (walterwrites.ai/ai-detector/, read 8 November 2026), and neither carries a number.
Walter Writes also says: "Treat the score and sentence-level items as review signals and consider the text, writer, and use case before making a decision" (walterwrites.ai/ai-detector-api/, read 8 November 2026). The detector FAQ says to contact the company for early API access, while the API page lists the AI Detector API as live with published pricing; the card records the API as available.
What independent studies found
No study in the index has tested Walter Writes; the detectors that have been tested are ranked on AI detectors ranked by independent testing.
The two widest nets in the studies index did not reach it either: Weber-Wulff 2023 tested fourteen detectors (DOI 10.1007/s40979-023-00146-z) and Walters 2023 tested sixteen (DOI 10.1515/opis-2022-0158), and Walter Writes is on neither list. The RAID benchmark of 2024 evaluated twelve detectors (DOI 10.18653/v1/2024.acl-long.674), again without Walter Writes.
Walter Writes publishes reliability language without a rate, and no outside study supplies one. On this card a reader has the vendor's words and the plan table, and nothing in between to weigh them against.
Where Walter Writes appears in the index
Rankings
- AIDI-R-04AI detectors ranked by languages supported
- AIDI-R-05AI detectors ranked by maximum input per check
- AIDI-R-07AI image, voice, video and code detectors ranked by independent studies
- AIDI-R-11AI detectors ranked by named integration surfaces
- AIDI-R-12AI detectors ranked by the upload formats the vendor states
- AIDI-R-14AI detector APIs ranked by published price per 1,000 words
- AIDI-R-15AI detectors ranked by the LMS platforms the vendor names
- AIDI-R-17AI detectors ranked by the generator models the vendor names
Fits these use cases, questions and comparisons
Walter Writes appears in one ranking: AI detectors by languages supported, at 20 languages, per the detector page read 8 November 2026.
Walter Writes sits on three audience views: AI detectors for business, because of the API plans and the Teams plan with 10 members, AI detectors for copywriters and agencies, because of the API, and AI detectors for job applications, because of the free 300-word trial. The detector hub lists all twenty-two cards.
Questions about Walter Writes AI detector
Is the Walter Writes AI detector free?
A 300-word trial is free with no credit card, per the Walter Writes home page read 8 November 2026. Paid plans start at $12 USD billed monthly or $8 USD monthly billed $96 annually for Starter, which carries 30,000 words per month, per the pricing page read the same day.
What accuracy does Walter Writes publish for its detector?
None as a number. Walter Writes says the detector is "one of the most reliable detection systems available" and "minimizes false positives", per the detector page read 8 November 2026, and no study in the index has tested Walter Writes. The card carries the statements as claims.
How many words can Walter Writes check per request?
750 on Starter, 1,500 on Pro and 2,000 on Elite and Teams, per the pricing page read 8 November 2026. Monthly allowances run from 30,000 words on Starter to 500,000 on Teams.
Which languages does the Walter Writes detector support?
The detector page says 20+ and names English, Spanish, French, German and Portuguese, read 8 November 2026. The homepage FAQ's 80+ figure covers the humanizer bundle.
Sources and revisions
Sources
- walterwrites.ai/ai-detectorRead 8 November 2026
- walterwrites.aiRead 8 November 2026
- walterwrites.ai/terms-of-serviceRead 8 November 2026
- walterwrites.ai/apiRead 8 November 2026
- walterwrites.ai/pricingRead 8 November 2026
- docs.walterwrites.ai/api-reference/detectorRead 8 November 2026
- walterwrites.ai/chrome-extensionRead 8 November 2026
- walterwrites.ai/privacy-policyRead 8 November 2026
- walterwrites.ai/ai-detector-apiRead 8 November 2026
