To keep things simple, we put the main features we tested into one table.
| Feature / Tool | QuillBotParaphrasing & Rewriting Hub | GrammarlyGrammar & Style Specialist | SmodinAll-in-One Writing Suite |
|---|---|---|---|
General Comparison | |||
Main focus | Editing and proofreading | Grammar and style | Full text work |
Writing from scratch | Limited | No | Yes |
Paraphrasing tools | Yes | Yes | Yes |
Features & Accuracy | |||
AI detection | Yes | Yes | Yes |
Plagiarism checker | Yes | Yes | Yes |
Readability check | No | Yes | Yes |
Humanization tools | Yes | Yes | Yes |
Methodology overview
We compared these tools based on how people actually use them, not just what they promise on the homepage. We tested real texts, checked how easy each tool feels, looked at AI and plagiarism checks, and paid attention to limits in free plans.
The goal was simple: see which tools help in real writing tasks and which ones feel restrictive.
Before going deeper, here's a quick and simple look at what each tool is and what it's mainly used for.
Tool overview
QuillBot was created as an accessible hub for rewriting and paraphrasing in 2017. It is popular among students and writers who want to change wording quickly. Today, the company offers many free tools and has expanded its services with audio, image, and search tools.
Tool overview
Grammarly was originally best known as a grammar checker. Over time, the company started positioning itself as a platform for full-text work. It now includes grammar and translations, various plagiarism and AI checks, as well as an all-knowing AI chat, although it still does not offer tools for creating text from scratch.
Tool overview
Smodin is an all-in-one writing platform covering text generation, rewriting, plagiarism and AI detection. The integrated AI Chat handles broader research and academic questions, making it useful for students, teachers, writers, and agencies who need multiple tools in a single workflow.
Now we look closer at how each tool behaves in real tasks. This will show what each one is good at and where it is less convenient.
We reviewed how each tool performs across common writing scenarios such as short texts, long-form content, and academic-style writing.
Quick look at prices and what you get:
Pricing breakdown by tool
Grammarly
Free version checks grammar and style. Premium costs around $12 per month in a yearly plan and gives AI detection, plagiarism checks, tone suggestions, and an AI Assistant.
QuillBot
The free version is limited by the number of words per check and the number of tries. Paid plan starts at $19.95 per month for unlimited access, and you can cancel anytime.
Smodin
Starter plan begins at $17.99/month and includes all core AI tools – writer, detector, humanizer, plagiarism checker, rewriter, translator, and AI chat. The all-in-one structure replaces multiple separate subscriptions.
What works well and what can be annoying for each tool.
Depending on what features you need, here's which tool fits best for different people:
Students will get a lot from Smodin and QuillBot. Smodin helps check for plagiarism and AI content, and also lets you edit your text. QuillBot is handy for rewriting or rephrasing short assignments or notes, but longer texts might need more checks.
Teachers will like Smodin and Grammarly. Smodin makes it easy to check students' work and watch for AI content, while Grammarly helps make texts clean, correct, and easy to read.
SEO writers can use Smodin and QuillBot. Smodin helps check text uniqueness, keep an eye on AI content, and edit large amounts of writing. QuillBot works well for rewriting sentences and making text sound more natural, which is great for creating content fast.
Agencies will benefit from Smodin because it has all the tools in one place and AI Chat to answer more writing and non-writing questions. You can write, edit, and check texts for different clients all at once.
Large institutions can use Smodin and Grammarly to keep text quality high. Smodin can check lots of materials at once and handle AI content and editing, while Grammarly helps make big documents or teaching materials grammatically correct and clear.
If you want other options for writing or checking text, ChatGPT is worth a look. It doesn't check grammar or plagiarism as well as Grammarly or Smodin, but it's great for quickly creating text and coming up with ideas. For students or writers who need to get something written fast, ChatGPT can be a good alternative
Good for generating new text and getting ideas.
Smodin is the most all-in-one tool here. You can write, rewrite, check for plagiarism and AI content, and even see readability feedback. QuillBot is best if you want to reword or rephrase text, but its AI and plagiarism checks are not always accurate. Grammarly leads for grammar checking, but also promises an AI Assistant. Nevertheless, the price per month is pretty high compared to other tools.
In the end, it all depends on what matters most to you – full control and checks, fast rewriting, or clean, polished text.
Practical answers to the questions teams ask before choosing a writing and originality stack.
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