Writing & AI tools / Undetectable AI / Alternatives

Alternatives to Undetectable AI

20 other tools do at least one of the 2 tasks Undetectable AI does. Tools with a tested score come first; the rest are ordered by how many tasks they share with Undetectable AI.

Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.

DeepL
Not enough data
Explore our AI suite and get more done: Translate speech, text, and media, or integrate the DeepL API.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Free version allows 1 file translation per month (up to 5 MB) and 50,000 characters of text translation per month, plus 1 glossary and 1 saved translation.
Signup
Not stated for the free version. Paid subscriptions are used by logging in with a DeepL account.
Undetectable AI vs DeepL
Ginger Software
Not enough data
Powerful and effortless desktop & mobile solutions for improving your writing and productivity. Ginger Software is your personalized editor - everywhere you go.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Not stated.
Signup
Not stated.
GPTZero
Not enough data
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
Shares 1 of 2 tasks: AI content detector
Free tier
Not stated.
Signup
A free account is required for scans exceeding 10,000 characters. The page says: “For scans over 10,000 characters, create a free account first.”
Grammarly
Not enough data
Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Free plan (shown as 0 INR/month on the India page) covers mistake correction, tone visibility and 100 AI prompts per month. Rewrites, tone adjustment, plagiarism and AI-text detection are not in Free.
Signup
Not stated.
Originality.ai
Not enough data
Use the accurate Originality.ai AI detector to identify if text was generated from a popular AI platform like ChatGPT, Gemini, Claude, Grok and others.
Shares 1 of 2 tasks: AI content detector
Free tier
Free plan at $0 for limited use: 10K words (100 credits, one time; 1 credit = 100 words). The comparison table instead shows 60 credits renewing daily, so the page is inconsistent. No file upload, PDF download, Deep Scan or API.
Signup
Not stated clearly. The page offers a Continue for Free option and an FAQ says sign-up is needed for the full suite.
Undetectable AI vs Originality.ai
Outwrite
Not enough data
Become a better writer with Outwrite. Our AI writing assistant is more than a grammar checker—it helps turn your ideas into powerful sentences, anywhere online. Get started for free.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Free Essential plan covers spelling and grammar, thesaurus, and use in Google Docs, Word, browser extensions and the web app. No usage limits are listed. Style improvements, sentence rewriting and plagiarism checks are not included.
Signup
Not stated.
Paperpal
Not enough data
Paperpal is a comprehensive AI academic writing tool and research assistant designed for researchers and students.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Not stated.
Signup
Not stated.
Paraphraser.io
Not enough data
Paraphraser is a free paraphrasing tool that helps you rephrase text, sentences, and paragraphs with AI algorithms to express ideas in your own words.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Some modes are free with a 600-word limit and no daily limit, per the page. The input box shows a 400-word limit, so the page is inconsistent. Other modes are marked premium.
Signup
Not stated.
QuillBot
Not enough data
QuillBot is listed for: paraphrasing tool, grammar checker, text summarizer.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Not stated.
Signup
Signing up is free. The page says: “Sign up now. It’s free!.”
Sapling
Not enough data
Sapling language model API toolkit and copilot for enterprise tasks. Sapling offers an API/SDK and turnkey integrations for grammar/spell checking, autocomplete, AI detection, paraphrasing, sentiment…
Shares 1 of 2 tasks: AI content detector
Free tier
Free plan gives basic writing help and AI detector checks up to 2,000 characters per check, 20 snippets, 5 files per detector batch, on free domains only. Advanced suggestions, Autocomplete and Rephrase are not included.
Signup
An account is required for the Pro trial and subscribing. Not stated for the free plan.
Undetectable AI vs Sapling
SmallSEOTools
Not enough data
You need effective SEO tools which are 100% free? Check out our Search Engine Optimization tools for checking backlinks, tracking keyword positions and more.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
The pricing page says there is no free trial. It labels some tools as Free (Paraphraser, Grammar Checker, Plagiarism API) but gives no limits.
Signup
Not stated.
Smodin
Not enough data
Detect AI text, humanize AI writing, and check plagiarism in one place. Smodin's AI detector and humanizer make your work read as authentic, human writing. Free to try.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Not stated. The pricing page lists only Starter and Premium plans. The home page says its live demos need no sign-up to try.
Signup
Not stated for the listed tasks. The home page says no sign-up is required to try the demos.
Undetectable AI vs Smodin
Winston AI
Not enough data
Winston AI is listed for: ai content detector, plagiarism checker.
Shares 1 of 2 tasks: AI content detector
Free tier
Not stated.
Signup
An account is required to begin checking for AI content. The page says: “Create your account for free to begin checking for AI content.”
Wordtune
Not enough data
Perfect your English with a free AI writer that can paraphrase, rewrite, correct your grammar and more.
Shares 1 of 2 tasks: Paraphrasing tool
Free tier
Free Basic plan gives 10 rewrites and AI suggestions per day, 3 AI summarizations per month, and unlimited spelling and grammar checks.
Signup
Not stated. The Basic plan links to a signup page.
Undetectable AI vs Wordtune
Copyleaks
Not enough data
Copyleaks is listed for: plagiarism checker, ai content detector.
Shares 1 of 2 tasks: AI content detector
Spinbot
Not enough data
Spinbot is listed for: paraphrasing tool.
Shares 1 of 2 tasks: Paraphrasing tool
TextCortex
Not enough data
TextCortex is listed for: ai writer, paraphrasing tool.
Shares 1 of 2 tasks: Paraphrasing tool
Turnitin
Not enough data
Turnitin is listed for: plagiarism checker, ai content detector.
Shares 1 of 2 tasks: AI content detector
WordAi
Not enough data
WordAi is listed for: paraphrasing tool.
Shares 1 of 2 tasks: Paraphrasing tool
ZeroGPT
Not enough data
AI Content Detector and ChatGPT Detector, simple way with High Accuracy. AI Checker & AI Detector Free for AI GPT Plagiarism by ZeroGPT.
Shares 1 of 2 tasks: AI content detector