Writing & AI tools / Compare
Smodin vs Undetectable AI
Both do 1 of the same writing & AI tools task. Below is what each says about its own limits and pricing, and how each ranks on signals we can measure or quote.
Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.
A
Smodin
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.
Signals score: 3.7 / 5 · not a hands-on test
Visit smodin.ioB
Undetectable AI
Undetectable AI is a tool that rewrites AI-generated text to read like human writing. It helps students, content writers and professionals. Free to start.
Signals score: 4.1 / 5 · not a hands-on test
Visit undetectable.aiPricing, limits and privacy
- Free tier
- A: Not stated. The pricing page lists only Starter and Premium plans. The home page says its live demos need no sign-up to try.
- B: Only a free trial limited to 250 words is described. More use needs a paid plan.
- Paid plan
- A: Starter and Premium, billed monthly or annually (annual marked Save 20%); currency selector shows USD. Exact prices were not readable on the page.
- B: 10K words per month: $9.99 monthly or $5.00 per month billed yearly ($60 per year). 20K words: $19.00 monthly or $9.50 per month yearly ($114). 35K words: $31.00 monthly or $15.75 per month yearly ($189). 50K words: $42.50 monthly or $21.25 per month yearly. Business pricing is custom.
- Signup
- A: Not stated for the listed tasks. The home page says no sign-up is required to try the demos.
- B: Not stated.
- Watermark
- A: Not stated.
- B: Not stated. The pricing page lists a feature called 'Watermark and future proof' without explaining it.
- Where files go
- A: Privacy policy says it does not apply to text customers process with the services, so where that text goes and how long it is kept is not stated. Account data is kept while there is a business need.
- B: Privacy notice says data may be transferred, stored and processed in other countries, and kept as long as needed for its purposes. It does not describe how entered text is handled, and its server-location line is incomplete.
From each tool's own pages, checked 2026-11-01. Prices and limits change; check the tool before you rely on them. Sources are listed on each tool's page.
Compare on a task
Neither tool has been hands-on tested on these tasks yet, and we do not guess. Open a task to see both ranked with every other tool.
- Only Smodin: Text summarizer, Plagiarism checker
- Only Undetectable AI: AI content detector
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