# Undetectable AI review (2026): is it worth $5 a month, billed yearly? > AI humanizer and AI detector sold by monthly word allowance Checked Nov 13, 2026 ยท graded Nov 13, 2026 by ToolGPA. Undetectable AI rewrites machine-written text so that AI detectors are less likely to flag it, and also offers its own AI detector. The site sells monthly word allowances, with a yearly billing option at half the monthly price. It also lists detectors for images, voice, video and documents. - **Category:** Writing Tools - **Made by:** Undetectable Inc. - **Website:** https://undetectable.ai - **Runs on:** Web, Browser extension - **Who should skip it:** Tight if you try it first: the trial is 250 words. - **Facts last checked:** Nov 13, 2026 ## Pricing As of Nov 13, 2026, Undetectable AI is a paid product with a free trial, starting at $5 per month for 10K words, billed annually ($9.99 billed monthly). - **Pricing model:** Free trial - **Free plan:** None. - **Free trial:** Free trial limited to 250 words; more use needs a paid plan. | Plan | Price | What you get | | --- | --- | --- | | 10K words | $5 per month for 10,000 words, billed annually ($9.99 billed monthly) | 10,000 words a month, charged $60 a year. The page crosses out $9.99 and marks yearly billing as 50% off. | | 20K words | $9.50 per month for 20,000 words, billed annually ($19 billed monthly) | 20,000 words a month, charged $114 a year. | | 35K words | $15.75 per month for 35,000 words, billed annually ($31 billed monthly) | 35,000 words a month, charged $189 a year. | | 50K words | $21.25 per month for 50,000 words, billed annually ($42.50 billed monthly) | 50,000 words a month. Larger allowances up to 380,000 words are listed, with custom pricing on request. | Read from https://undetectable.ai/pricing on Nov 13, 2026. Prices change, so confirm with Undetectable AI before buying. ## Ways to pay less - **Yearly billing at half the monthly price** (Annual discount): The pricing page marks yearly billing as 50% off the monthly rate, for example $60 a year for 10,000 words a month. Source: https://undetectable.ai/pricing ## Key features - **AI humanizer:** Rewrites AI-generated text with the aim of passing AI detectors, with writing-level matching. - **AI detector:** Paid plans list unlimited AI detecting. Separate detectors exist for images, voice, video, deepfakes and fake PDFs, receipts and IDs. - **Writing tools:** The site also lists an essay writer, stealth writer, paraphrasing tool, SEO content writer, plagiarism checker and a human auto-typer. - **Refund if flagged:** The pricing page says the cost of a humanization is refunded if the output is flagged as not human; details are on the Help pages. - **API and Chrome extension:** Plans are marked API compatible, and the site lists a Chrome extension. ## Good for - People who want to run text through both a rewriter and a detector - Light users who need only a few thousand words a month - Teams wanting bulk or non-expiring credits through the contact route ## Worth knowing - The free trial is capped at 250 words. - Plans are measured in words per month, so heavy users move to the larger tiers quickly. - The $5 figure is the yearly-billing rate with a crossed-out $9.99; month-to-month the first plan is $9.99. - Non-expiring credits and white labeling are offered only on the custom business plan. ## ToolGPA grades **GPA: 2.2 out of 4**, graded Nov 13, 2026. Undetectable AI is a humanizer and detector sold by monthly word allowance, from $5 a month on annual billing. The trial stops at 250 words, month-to-month the first plan is $9.99, and heavy users move up tiers fast. - **Value for money: B.** $5 a month billed annually for 10,000 words, inside the category's cheapest quarter at $5.75. Month-to-month it's $9.99, around the middle. - **Free plan and trial: D.** A free trial capped at 250 words, and the listing doesn't say whether a card is needed. - **Features: C.** Humanizer, detector, writing tools and a refund if flagged. It covers the job, with a word budget attached. - **Ease of use: C.** No store rating on record. Pasting text in is quick, but results need checking. - **Platforms and integrations: B.** Web and a Chrome extension, with an API. These are ToolGPA's own grades. Graded from this listing, whose facts were read from Undetectable AI's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among writing tools - Undetectable AI's GPA of 2.2 is higher than 35 of the 136 other writing tools we grade, and level with 23. - It stands best on value for money (B, above 73 of 136) and worst on free plan and trial (D, above 12). - Its paid plans start at $5 a month, against a middle price of $8.66 for the category: 14 of the 81 others that charge start lower. - On features, ease of use and platforms it scores 2.3 out of 4. 13 tools score higher and cost less. The category's chart of price against score: https://toolgpa.com/charts/writing ## Keep it, or make your own? **Your call.** A writing app at its plainest is a page that saves what you type. You could make the core of Undetectable AI for yourself: documents. What you would give up is listed below. Whether that is worth the price is your call. It costs $60 a year. - You could make: Documents: an app builder makes this well. - You could make: It runs in a browser, which is where something home-made would run too. - You could not: An API that other software can build on. - You could not: AI features, unless you pay a model provider for each request yourself. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. **Tags:** AI features, Public API, Documents ## Alternatives - [WriteHuman](https://toolgpa.com/tools/writehuman): AI humanizer with a built-in AI text and image detector. [Compare](https://toolgpa.com/compare/undetectable-ai-vs-writehuman) - [QuillBot](https://toolgpa.com/tools/quillbot): AI paraphraser with grammar, summarizing and AI-detection tools. [Compare](https://toolgpa.com/compare/quillbot-vs-undetectable-ai) - [GPTZero](https://toolgpa.com/tools/gptzero): AI-writing detector with plagiarism, writing replay and an API. [Compare](https://toolgpa.com/compare/gptzero-vs-undetectable-ai) - [Winston AI](https://toolgpa.com/tools/winston-ai): AI text and image detector with a plagiarism checker. [Compare](https://toolgpa.com/compare/undetectable-ai-vs-winston-ai) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 13, 2026: - https://undetectable.ai/pricing Page: https://toolgpa.com/tools/undetectable-ai Listed by ToolGPA (toolgpa.com).