7 Best Free Grubby AI Alternatives in 2025

If you're struggling with writing, you aren't alone. Many students struggle with writing content that sounds natural without stressing out over it.

If that's you, don't worry, there are many tools (like Grubby AI) that can help you improve your writing.

In this article, we'll list the 7 best free Grubby AI alternatives you can use to humanize text and improve your writing in 2025. Let's dive in!

What is Grubby AI?

Grubby AI is an AI humanizer that rewrites text to make it sound more human.

It’s designed to change the tone, sentence structure, and vocabulary of AI-generated text. You can paste in text or upload files, then the AI will analyze it and edit it for you.

What Does Grubby AI Do?

Grubby AI takes text and rewrites it in a way that sounds more human. Here are a few of the primary use cases:

• Humanizing text (making it sound more natural)

• Checking/proofreading with AI (checking for mistakes)

• Rewriting (writing new versions of text according to your requirements)

These types of tools are especially useful for students submitting AI-assisted work. It doesn’t write essays for you but helps you rewrite them.

Is Grubby AI Free?

Grubby AI offers a free plan, but it has limits on word count. To get a higher word count, you have to upgrade to a paid plan.

If you’re looking for unlimited or more flexible options, you might want to try a different Grubby AI alternative.

How to Choose a Grubby AI Alternative for Students

If you're a student looking for free writing help, the right tool can make a big difference in your work.

Here are the key features to look for when choosing a free Grubby AI alternative:

• Free access for students - Choose tools that don't lock essential features behind paywalls or require expensive licenses.

• No file uploads needed - Look for tools that work directly in your browser or document so you can get instant feedback without switching tabs or uploading files.

• Real-time writing help - The best alternatives provide suggestions as you write, helping you catch mistakes and improve your style on the spot.

• Detailed proofreading - Go beyond basic spell-check—find tools that identify grammar issues, awkward phrasing, and structural problems in your essays.

• Constructive feedback - Choose tools that explain why something should be changed, not just what to change. This helps you become a better writer over time.

• Works anywhere online - Pick tools that function across multiple websites and platforms so you're not limited to specific apps or editors.

The right tool should feel like having a writing tutor available 24/7. Focus on alternatives that help you understand your mistakes and grow as a writer, not just fix surface-level issues.

7 Best Free Grubby AI Alternatives in 2025

Grubby AI isn’t the only option for making AI text sound more human. If you’re trying to improve and proofread your work, these options can help rewrite and check your writing in different ways.

Here's our list of the 7 best free Grubby AI alternatives in 2025:

1. AI Blaze

First up on our list of the best free AI humanizer tools is AI Blaze.

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

Here's how AI Blaze stands out:

• Proofread your writing with AI - AI Blaze helps you fix mistake and identify areas for improvement.

• Rewrite & improve text with AI - AI Blaze can humanize your writing, rewrite it to make it sounds more natural, and improve your writing anywhere online.

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

• AI Blaze works on any website - Improve writing and humanize text on any website!

• No file uploads necessary - With AI Blaze, you don't have to copy/paste or upload files, it works anywhere!

Price

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

2. Undetectable AI

Undetectable AI rewrites text to make it less robotic. You paste in your content, and the tool gives you a version that sounds more like a real person wrote it.

Tools like Undetectable AI are often used to help content pass AI checkers used in schools and online platforms.

Price

• Offers a free trial, then paid plans that offer more usage start at $19/month.

3. Walter Writes AI

Walter Writes AI gives you multiple rewrite versions so you can choose the one that sounds most natural.

You can copy and paste AI text in, then compare outputs side by side. This makes tools like Walter Writes AI useful for humanizing text in your writing style.

Price

• Offers a starter trial, then requires a paid plan: Starter ($10/month), Pro ($19/month), Unlimited ($56/month).

4. StealthWriter AI

StealthWriter AI focuses on helping students rewrite robotic text quickly. You paste in the original version, and it gives you a revised version that sounds more human.

Tools like StealthWriter also provide a comparison between the two versions, so you can see what changed. The tool is minimal and doesn’t require much explanation, which makes it good for fast fixes.

Price

• Offers a free plan, then requires an upgrade for more words. The Basic plan is $20/month.

5. Humbot AI

Humbot AI does more than just rewrite text—it also highlights which parts of your writing are likely to get flagged. This is useful if you want to learn what looks “too AI” and adjust those sections.

After you paste in your content, it gives suggestions and rewrites for the risky areas. Similar tools to Humbot AI are useful for making AI-written text undetectable.

Price

• One time purchase of 2,000 words for $9.99. You can also choose the Basic plan ($11.99/month) which offers 3,000 words.

6. Phrasly AI

Phrasly AI gives you multiple options for rewriting, ranging from small edits to full sentence rewording.

The tool is browser-based and doesn’t require a login, which is useful for students on a budget.

Price

• Offers a free plan with limitations. The Unlimited plan is $19.99/month.

7. StealthGPT

StealthGPT is built specifically to help users rewrite text that’s been flagged by AI detectors. You can control how human you want the final version to sound before generating the rewrite.

Humanizers like StealthGPT are designed to handle both short answers and longer essays. Some features are locked to paid users, but the free tier includes basic rewrites and testing.

Price

• The Essential plan is $24.99/month and the Pro plan is $34.99/month.

What is the Best AI Humanizer?

The best AI humanizer really depends on what you need it for. If you're just looking for a quick one-time rewrite to make your text sound more natural, almost any basic humanizer will do the job.

However, if you want more in-depth help with your writing, we recommend looking for tools that offer comprehensive feedback and proofreading features. These advanced options can identify structural issues, suggest improvements to your writing style, and help you understand why certain phrases sound robotic.

For students trying to improve their skills, tools that provide detailed explanations and constructive criticism are far more valuable than simple rewriting services. The right choice comes down to whether you want a quick fix or a learning experience that makes you a better writer over time.

To recap, our suggestion for the best free Grubby AI alternative is AI Blaze. AI Blaze is your personal AI writing assistant that helps you improve your writing on any website for free!

Give AI Blaze a try for free today!