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Grubby AI Humanizer Review: Features, Testing, and Best Alternatives

2025-05-13 | Zoey

In recent years, AI-generated content has played an increasingly important role in people's writing, marketing, and SEO optimization. However, how to make AI-written articles more "human" so as to bypass AI detectors and obtain a more natural reading experience has always been the focus of content creators.

Today, I will review a popular AI text humanization tool - Grubby AI Humanizer. We will see together whether it is worth using and how it actually works. At the same time, I will also recommend several alternative tools with better experience to help you find the most suitable AI humanizer solution.

What is Grubby AI Humanizer?

Grubby AI is an online AI text humanization tool. Its main function is to "humanize" AI-generated texts, aiming to improve the naturalness and readability of the content, and help the text pass the inspection of AI content detection tools (such as GPTZero, Originality.ai, Turnitin, etc.).

Core features include:

  • Rewrite AI writing content into a more natural human tone
  • Supports "bypass" optimization of multiple detection tools
  • Simple online interface, easy to use
  • Free trial + paid version

Is Grubby AI worth the money?

Grubby AI offers four different plans to suit different needs from casual users to professional content creators. Here are its prices and features.

Plan

Price

Input Limit per Use

Monthly Word Limit

Key Features

Free

Free

Up to 300 words

300 words/month

No registration required; basic AI detection bypass; ideal for trial use.

Basic

$3.99/month (billed annually) or $6.99/month (monthly billing)

Up to 500 words

7,500 words/month

Bypasses all AI detectors; natural output; suitable for occasional users.

Pro

$8.99/month (billed annually) or $9.99/month (monthly billing)

Up to 1,500 words

30,000 words/month

Includes Standard + Enhanced modes; perfect for creators and bloggers.

Unlimited

$14.00/month (billed annually) or $19.99/month (monthly billing)

Up to 2,500 words

Unlimited

Unlocks all features with no usage limits; ideal for heavy users and teams.

Actual experience: Is Grubby AI good?

To evaluate its actual effect, I input a standard explanatory text written by GPT-4 into Grubby AI and observe the results.

Original input (generated by AI):

Artificial Intelligence has become a powerful tool in content creation. It enables users to generate text quickly and efficiently. However, it often lacks the nuance and warmth of human writing.

Grubby AI output:

Content creation has changed drastically thanks to AI. It's fast, efficient, and super helpful. But let’s be honest—it still can’t match the subtle touch and feeling of something written by a real person.

Test Results Summary

Test Category

Rating (out of 5)

Remarks

Humanization Quality

ā­ā­ā­ā­ā˜† (4/5)

Smooth rewriting with a more natural, slightly conversational tone.

AI Detection Bypass

ā­ā­ā­ā˜†ā˜† (3/5)

Still flagged as “likely AI-generated” by GPTZero.

Ease of Use

ā­ā­ā­ā­ā˜† (4/5)

Registration and login required.

Processing Speed

ā­ā­ā­ā­ā˜† (4/5)

Outputs generated in a few seconds; overall smooth experience.

Pricing & Limitations

ā­ā­ā˜†ā˜†ā˜† (2/5)

Limited free word count; value for paid plans is average.

Summary: Grubby AI is more suitable as a temporary rewriting tool. Its output style has a certain "content creator" tone, which is suitable for blogs, soft articles and SEO articles. However, it is not stable enough for academic purposes or scenarios that require 100% bypassing AI detection.

For students, Humanize AI is a more cost-effective option that excels at bypassing detection tools like GPTZero and Turnitin, making it a go-to tool for generating high-quality content that is difficult to detect.

I decided to test the performance of Grubby AI and Humanize AI against each other using several different types of text content to fully evaluate their abilities to humanize and bypass AI detection.

Content Type

Grubby AI Result

Humanize AI Result

Email

AI Writing

Human Writing

Academic Paper

AI Writing

Human Writing

Report

Human Writing

Human Writing

Marketing Content

Human Writing

Human Writing

Social Media Post

Human Writing

Human Writing

Human Score

60%

98%

Looking for an alternative?

1. Humanize AI

  • Advantages: Good at generating highly natural, indistinguishable writing, able to bypass detection tools such as GPTZero and Turnitin. Supports multiple text types, including academic papers, emails, marketing copy, etc.
  • Applicable people: content creators, students, users who need to pass AI detection.
  • Highlights: Up to 98% "human writing" judgment, suitable for long-term use.

2. Writerly AI

  • Advantages: Provides a variety of writing style options, and can automatically adjust the language mode according to different needs. There is also optimized AI detection bypass technology.
  • Applicable people: users with diverse creative requirements, especially in SEO optimization and blog writing.
  • Highlights: Content output is more creative and suitable for various writing tasks, including social media content and technical documents.

3. QuillBot

  • Advantages: With grammar and content rewriting as the core, it provides a variety of mode options, which can improve the fluency of articles and avoid duplication of content.
  • Applicable people: users of writing, academic research and creative writing, especially users with high demand for article rewriting.
  • Highlights: Easy to use, and provides many functions for free, suitable for beginners and daily writing needs.

4. Paraphrase Online

  • Advantages: Can easily rewrite short and long articles, providing fast rewriting functions.
  • Suitable for: students, academic writing, and users who need to rewrite documents efficiently.
  • Highlights: Free to use, no registration required, and supports multiple languages.

5. Slick Write

  • Advantages: In addition to content rewriting, it can also provide grammar checking, writing style analysis, etc.
  • Suitable for: users who have strict requirements on grammar, style and readability.
  • Highlights: Can conduct detailed writing analysis of articles to help improve the quality of articles.

In summary

Grubby AI Text Humanizer is a powerful text rewriting tool, especially for those who need to bypass AI detection tools. If your goal is to quickly generate relatively natural text and have the need to bypass detection, Grubby AI is a worthy choice. However, if you need a higher level of detection bypass, or a more natural and personalized output, you may want to consider other tools such as Humanize AI, which provides higher reliability and results in this regard.

In general, Grubby AI is suitable for users who have basic needs for detection bypass, but do not need the highest quality natural writing. If you are a creator or student who frequently needs to generate high-quality humanized content, you may prefer to choose Humanize AI, which has more comprehensive functions and stronger detection bypass capabilities.