You used AI to help with your paper, but now it’s getting flagged by detection tools. Maybe your teacher called it out, or Turnitin gave it a high AI score, even though you rewrote it.

It’s frustrating, especially when you’re just trying to save time or improve your writing. Tools like StealthGPT claim to fix this, but they’re not always free or reliable.

Using an effective AI humanizer helps you make your writing undetectable from AI detection tools like Turnitin.

In this article, we'll list out the 7 best free StealthGPT alternatives you can use to make your writing undetectable in 2025. Let's dive in!

What is StealthGPT? Is It Legit?

Yes, StealthGPT is a real tool that can humanize AI content. Many users say it works well for bypassing popular AI checkers.

It's an AI humanizer & proofreader that helps you make AI writing undetectable by AI checkers or detection tools.

That said, its performance can vary depending on the detection tool you’re up against. Some people report mixed results, especially on free versions of the tool. That’s one reason why it’s useful to have backups or other tools ready.

Is StealthGPT Free?

StealthGPT offers a free plan with limitations. Once you hit the limit, you have to upgrade to a paid plan.

If you’re a student who needs a reliable free option, there are several tools out there that don’t require payment or sign-ups.

Things to Look for in StealthGPT Alternatives

Not all StealthGPT alternatives work the same way. Some focus on rewriting content, others focus on proofreading, and some combine everything into one tool.

Here’s what to check before using a tool:

• Bypass rate - The tool should help you pass AI checkers most of the time.

• Human-like output - The final result should read naturally, like something a real person would write.

• No account required (or at least free access) - Tools that work without logging in save time and reduce friction.

• Adjustable tone or style - Having control over how the content sounds is useful for different types of assignments.

• Fast and simple - The tool should be easy to use and give you quick results.

7 Best Free StealthGPT Alternatives

If StealthGPT isn’t working for you or keeps hitting usage limits, you’re probably looking for something better—or at least more consistent.

These tools can help you rewrite AI-generated content so it sounds more natural and avoids getting flagged by AI detectors.

Here's our list of the 7 best free StealthGPT alternatives:

AI Blaze

First up on our list of the best free StealthGPT AI alternatives is AI Blaze.

AI Blaze is your personal AI writing assistant that helps you proofread your writing, check for AI detection, and rewrite your text to humanize it and eliminate grammatical errors.

With AI Blaze, you can write essays/papers and check them for mistakes, structure issues, and content suggestions anywhere you work using AI!

Features

• Proofread your writing with AI - AI Blaze helps you fix mistakes, check for AI detection, and identify areas for improvement.

• Humanize your writing with AI - AI Blaze can humanize your writing, rewrite it to make it bypass AI detection, and improve your writing anywhere online.

• Summarize any text, image, article, or PDF - Generate notes, citations, and summaries (and even study guides) on any website with AI.

• Instantly use GPT-4 on any site with keyboard shortcuts and a dynamic AI sidebar assistant!

• AI Blaze is free! - Forget about annoying licenses or subscriptions

StealthWriter AI

StealthWriter AI focuses on rewriting text to avoid triggering common AI detectors. Instead of major changes, it applies light but smart edits to make writing feel less robotic.

The tool modifies sentence structure and vocabulary, often improving the flow in the process. You don’t get a lot of customization, but it works well for making AI writing sound more human.

Walter Writes AI

Walter Writes AI offers a quick way to humanize content by focusing on sentence rhythm and word choices. It scans your input and rewrites it in a tone that feels more personal and less automated.

The output usually sounds casual and natural, which helps reduce the chance of being flagged. While it doesn't allow much control over the style, the simplicity is part of what makes it work.

Humanize AI

HumanizeAI is a simple tool that rewrites AI-generated content to avoid AI detection. It adjusts phrasing, sentence structure, and vocabulary to better reflect how people actually write.

The tool doesn’t add much fluff, which makes the output more usable without heavy editing. It works best on text that already has decent structure but needs fine-tuning to feel less robotic.

Phrasly AI

Phrasly AI gives users multiple rewriting styles to choose from, including casual, formal, and neutral. This makes it useful for tailoring content to fit the tone of different assignments.

Tools like Phrasly change sentence flow, vocabulary, and sometimes structure to avoid AI detector patterns. It’s helpful for students working on essays, emails, or even social posts.

Undetectable AI

Undetectable AI is designed specifically to beat AI checkers by rewriting your text with subtle changes. It focuses on shifting the structure and tone without changing the meaning.

Tools like Undetectable are often used by students looking for a reliable way to clean up content generated with AI. It also includes an AI checker so you can compare the before-and-after results.

AIHumanizer

AIHumanizer.ai is a straightforward tool that rewrites content to sound less like it came from an AI. It simplifies complex sentence patterns and replaces predictable phrases with more natural language.

The interface is basic—just paste your text and get the output. It doesn’t try to be flashy but gets the job done when you need a fast rewrite.

Prompts to Help You Bypass AI Detection

Using the right prompt can make a big difference when you're trying to rewrite content that won’t get flagged.

If your goal is to make AI writing sound more natural, clear, and human, you’ll want to give the AI better direction.

Here are some prompts you can use to bypass AI detection:

• Rewrite this text so it sounds like it was written by a college student. Vary sentence length, avoid repetitive phrases, and make sure the tone fits an academic setting.

• Rephrase this content to sound natural and undetectable by AI checkers. Focus on improving sentence flow, word choice, and clarity without changing the meaning.

• Take this paragraph and rewrite it to pass AI detection tools. Make it sound like something a real student would turn in, with smoother transitions and a clear tone.

• Edit this short response to avoid common AI patterns. Use informal but clear language, break up longer sentences, and fix anything that sounds robotic.

• Improve this essay draft to feel more human-written. Adjust sentence rhythm, remove awkward phrasing, and add light transitions between ideas.

Make Your Writing Fly Under the Radar

AI detection tools are getting stricter, and students are stuck with the consequences. StealthGPT is one option, but it’s not the only one, and definitely not always the best for every situation.

These StealthGPT alternatives give you more free, flexible ways to make your content sound human and avoid getting flagged. Try a few and see what works best for your writing style and the platform you're submitting to.

To recap, our suggestion for the best free StealthGPT alternative is AI Blaze. AI Blaze is your personal AI writing assistant that helps you humanize text to make it bypass AI detection. Plus, AI Blaze works on any website and is 100% free for students.