We put everything into one table. You can quickly see what ZeroGPT, GPTZero, and Smodin offer and how they differ at a glance.
| Feature | ZeroGPTFree-Tier AI Detection Focus | GPTZeroAcademic AI Detection Focus | SmodinAll-in-One Writing Suite |
|---|---|---|---|
General Comparison | |||
Main focus | AI detection | AI detection for academic use | AI detection, Humanization, Writing |
Best for | Quick checks | Academic review | Full text work |
Availability | Web + Chrome extension | Web + Chrome extension | Web + Chrome extension |
Features & Accuracy | |||
Paid AI checks | Yes | Yes | Yes |
Plagiarism check | Yes | Yes | Yes |
AI humanizer | Yes | No | Yes |
Writing from scratch | No | No | Yes |
Rewriting tools | Yes | Yes | Yes |
Language support | All popular languages | All popular languages | 100+ languages |
Methodology overview
These tools are pretty similar, so we didn’t test every single feature. We focused on the main things people actually use. We checked how well they spot AI text, how accurate the results are, and how easy the tools are to work with. We also looked at what’s free, what costs money, any limits, and how many languages they support. The goal was simple – see how they work in everyday use, not just what the websites promise.
Let's start with some general info about each service.
Tool overview
ZeroGPT started in 2023 and is mostly used for checking if a text was written by AI. Later, the tool was completed with more options like a plagiarism checker, a word count, a translator, a paraphraser, and others. People like it for quick AI checks, and reviews are generally positive.
Tool overview
GPTZero was created in 2023 for academic and school use. Free checks are limited, but the paid AI checker is commonly used for academic checks and is easy to use. It’s a good option if you need detailed AI detection, even though the free version is far from advanced.
Tool overview
Smodin was founded in 2017 and does way more than just AI checks. You can write, rewrite, check for plagiarism and AI, and even see readability scores. It works in many languages, and users like it for being a complete tool for writing and checking.
Below you can see the main features of each tool. We keep it simple and in the same order for all three, so it's easy to compare.
All three are easy to use. Smodin shows all the tools together so you can find them quickly. ZeroGPT and GPTZero are very simple and run right in the browser.
Every tool has its weak points because they work differently and use different extra features.
Quick look at prices and what you get:
Pricing breakdown by tool
Smodin
Smodin will cost you from $17.99 per month, but you may choose a premium plan for $24.99.
GPTZero
GPTZero costs $12.99 per month if you pay yearly or $24.99 if you pay monthly.
ZeroGPT
ZeroGPT starts at $7.99 a month, though character limits on the entry plan push most users to $14.99 Plus or $18.99 Max. At that price point, Smodin's $17.99 Starter plan delivers more per dollar – you get AI detection plus writing, rewriting, plagiarism checking, translation, and AI Chat, rather than a single-purpose detector.
Every tool has good points and weak spots. Let's look at the main pros and cons for each one.
Each tool has its strengths, so here's the best pick for different people.
Smodin is a strong option for students. You can write, rewrite, and check your work all in one place, plus everyone can use AI Chat for getting text-related and other answers.
Teachers benefit most from Smodin's combination of AI detection, plagiarism checking, and detailed exportable reports – all essential for reviewing student work. GPTZero is a solid alternative focused purely on academic AI detection if you don't need writing or plagiarism tools alongside.
Smodin is suitable for SEO writers because it helps create, edit, and polish content in many languages.
Agencies benefit most from Smodin because it combines writing, rewriting, AI detection, plagiarism checking, translation, and AI Chat in one workspace – useful when different clients need different content workflows. ZeroGPT works for agencies focused purely on AI verification.
Smodin may be a strong option for big schools or companies. Many people can use it at the same time, it works in different languages, and the reports are easy to understand.
If you want other options, you could try ChatGPT for generating new text and getting ideas. Or use QuillBot if your task is rewriting and paraphrasing. It is similar to ZeroGPT in some ways, but each has its own strengths. Both ChatGPT and QuillBot handle narrower use cases – Smodin covers writing, rewriting, and detection in a single tool if you want to avoid switching platforms.
Good for generating new text and getting ideas.
Useful when your task is rewriting and paraphrasing.
As you can see, all three tools are worth your attention, and each one has its own fans. Still, compared to the others, only Smodin offers the broadest set of writing and checking features among these three tools. That’s perfect, because now you can try them and decide which one you like the most.
So choose a tool depending on what you need – writing, polishing text, academic work, or just checking to be sure your text is correct.
Practical answers to the questions teams ask before choosing a writing and originality stack.
Also from Smodin
Add these tools when you want faster drafting, clearer citations, and quick checks before you submit or return work.
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