5 Best Free Sidekicker AI Alternatives in 2025

When you work on essays, discussion posts, or research papers, rewriting and humanizing it text can be frustrating. You might need something that helps polish your writing, fix tone issues, or make AI responses sound more natural.

Tools like Sidekicker AI can help, but it is not the only option. You might want alternatives that feel more flexible, easier to use, or completely free.

In this article, we'll cover the 5 best free Sidekicker AI alternatives for humanizing text in 2025.

What is Sidekicker AI?

Sidekicker AI is an AI humanizer that rewrites AI text to sound more human. Many students use it to improve tone, reduce AI-style phrasing, and keep writing natural.

It can help with essays, assignments, and online writing tasks. The tool is simple to use, which makes it appealing for quick fixes.

Is Sidekicker AI Free?

Sidekicker AI offers a 7-day free trial (for $1.95), but once it ends, you have to upgrade to a paid plan.

After the free trial, you have to upgrade to a paid plan ($29.99/month or $199/year).

If you are looking for an AI writing tool but aren't ready to break out your credit card, don't worry, there are plenty of other tools out there that offer expanded free usage.

How to Choose a Sidekicker AI Alternative

When you're comparing these tools, the main goal is to find something that makes writing easier and fits into how you already study online.

Here are some things to look for when choosing a Sidekicker AI alternative:

• Free plans for students - Look for tools with a free tier you can use regularly without needing to pay.

• Works across multiple websites - It should work in Google Docs, LMS pages, email, or wherever you write.

• Writing assistance - Rewriting, editing, tone help, and polishing features make assignments easier.

• No file uploads required - Tools that rewrite directly in your browser save time and reduce friction.

• Useful for studying - Features like summarizing, explaining text, or fixing academic tone can help with homework and essays.

Pick the one that fits your workflow best. A tool that works everywhere without uploads usually feels the most convenient for daily school assignments.

5 Best Free Sidekicker AI Alternatives

Here's our list of the 5 best free Sidekicker AI alternatives:

1. AI Blaze

First up on our list of the best free Sidekicker AI alternatives 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!

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

2. StealthWriter AI

StealthWriter AI focuses on rewriting text to sound more natural and less AI generated. Many students like it for converting AI essays into a more authentic voice.

It supports tone controls so you can make writing feel casual or formal depending on the assignment. The interface is simple, which helps when you need quick edits.

Price: 5,000 free words, then $20/month.

3. Grubby AI

Grubby AI offers rewriting and paraphrasing features designed for school writing. You paste your text, choose a tone, and let the system reword it.

It is good for students who want fast results without too many settings. Sites like Grubby AI remove repetitive phrasing that AI writing often creates.

Price: Limited free plan.

4. TwainGPT

TwainGPT helps improve clarity and tone in writing, especially for academic work. It can adjust sentence flow, rewrite awkward sections, and help reduce AI-sounding structure.

Students who need more natural writing for discussion posts or essays often try it as an alternative to Sidekicker AI. Tools like TwainGPT are web based, so you can open them quickly while working.

Price: 250 free words, then $10/month.

5. Ryne AI

Ryne AI is another option for humanizing AI text and rewriting paragraphs. It offers a clean interface and lets you refine tone or style with simple controls.

Students like it for polishing writing before turning in assignments or sharing work. It is useful for quick rewrites and short essays.

Price: 100 free credits, then paid plans start at $19.99/month.

What is the Best AI Humanizer?

There isn’t one tool that fits everyone, because what counts as the "best" depends on what you need. Though, it does depend on what you need.

Some students want quick rewrites that sound more natural, while others need more writing support like summarizing, tone adjustments, or help with academic wording.

The easiest way to choose is to try a couple and see which one feels smooth in your workflow. Go with the option that helps you write confidently without extra steps.

To recap, our suggestion for the best free Sidekicker 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!