AI humanizer comparisons
Honest, dated comparisons of Lumi Humanizer with other AI rewriting tools. Every price and limit links to the company's own page. Last checked October 18, 2026.
Lumi Humanizer vs Undetectable AI
Undetectable AI costs less on a yearly plan and has more extras, like a Chrome extension, an API and 55 languages. Lumi is better value for heavy use: $49.90 a month buys unlimited words, with a detector, paraphraser, grammar and plagiarism checker included.
Lumi Humanizer vs Walter Writes AI
Walter Writes gives more words on its smaller plans, lists 80+ languages and refunds a first purchase. Lumi starts cheaper at $9.90 a month and offers unlimited words for $49.90, with grammar and plagiarism checks included.
Lumi Humanizer vs StealthGPT
At similar prices Lumi includes more words: $29.90 buys 100,000 words a month (StealthGPT Pro: 50,000 for $29.99), and $49.90 buys unlimited words (StealthGPT Max: 200,000 for $49.99). StealthGPT has more extras, like an iOS app, weekly plans and a money-back policy if text gets flagged.
Undetectable AI alternatives
The main alternatives to Undetectable AI are Walter Writes, StealthGPT, QuillBot, Grammarly and WriteHuman, plus Lumi, which made this page. Here is what each costs and includes, from their own pages.
How we compare
How do you compare the tools?
We only use what each company states on its own website: pricing, free plan, word limits and refund policy. Every fact links to its source and shows the date we checked it.
Are these comparisons biased toward Lumi?
Lumi makes these pages, so read them with that in mind. That is why each page also lists where the other tool is better and who should pick it instead.
Do you test which tool passes AI detectors?
Not on these pages. Detector results change often and depend on the text, so we stick to facts each company publishes.
How current are the comparisons?
Each page shows the date we last checked every source. Plans change often, so if you spot something out of date, email contact@lumihumanizer.com and we will fix it.