Writing tools split into two very different jobs: correcting the text you wrote, and producing text you did not.
9 tools · 6 free or freemium · 0 with a published free allowance · updated 2026-09-18
Writing & Content — 9 AI tools reviewed on AI Supermarket, including Grammarly, QuillBot, Rytr, Wordtune. 6 of 9 have a free or freemium tier. Every entry links to the vendor's official site. Machine-readable index: /llms.txt.
The correction category is mature and genuinely useful. Grammarly and Wordtune sit in the editor and improve what you already wrote — grammar, clarity, tone, length. These tools are low-risk because you remain the author.
The generation category is where the trouble starts. Tools like Rytr and HyperWrite will draft a blog post or an ad from a prompt, and the output is fluent but generic. It reads well and says little, which is precisely the failure mode that search engines and readers now penalise.
A third category is easy to overlook: verification. Originality.ai exists because publishers need to know whether a submission was machine-written. If you publish at volume, having a detection and plagiarism step in the workflow is now standard practice.
| Tool | Pricing | Free tier | What it does |
|---|---|---|---|
| Grammarly grammarly.com |
Freemium | — | Real-time grammar, clarity and tone suggestions everywhere you type. |
| QuillBot quillbot.com |
Freemium | — | Paraphraser, summarizer and grammar checker trusted by students. |
| Rytr rytr.me |
Freemium | — | Quick, affordable AI writer for 40+ use cases and tones. |
| Wordtune wordtune.com |
Freemium | — | Rewrites sentences for clarity, tone and length. |
| Sudowrite sudowrite.com |
Paid | — | Creative writing partner for novelists — describe, brainstorm, draft. |
| HyperWrite hyperwriteai.com |
Freemium | — | AI writer with web research, citations and a browser assistant. |
| Writer writer.com |
Paid | — | Enterprise generative AI platform with brand and style guardrails. |
| Originality.ai originality.ai |
Paid | — | AI-content detection and plagiarism scanning for publishers. |
| Hemingway hemingwayapp.com |
Free | Free to use | Editor that makes your writing bold and clear, with AI rewriting. |
The tool is not the problem; the output is. Mass-produced, generic pages are penalised whether a human or a model wrote them. Use these tools to draft and edit, then add the specifics, examples and judgement that make a page worth reading.
Occasionally, which is why you should read every accepted suggestion. They are reliable on spelling, agreement and punctuation, and less reliable when a rewrite would alter emphasis.
Not reliably. They flag text on statistical patterns, produce false positives on formal human writing, and can be defeated by light editing. Treat a score as a signal to investigate, never as evidence.
Last reviewed 2026-09-18. Pricing and free allowances are read from vendor pages and change without notice — verify before committing. This page is an independent directory and is not affiliated with the tools listed.
Real-time grammar, clarity and tone suggestions everywhere you type.
Paraphraser, summarizer and grammar checker trusted by students.
Quick, affordable AI writer for 40+ use cases and tones.
Rewrites sentences for clarity, tone and length.
Creative writing partner for novelists — describe, brainstorm, draft.
AI writer with web research, citations and a browser assistant.
Enterprise generative AI platform with brand and style guardrails.
AI-content detection and plagiarism scanning for publishers.
Editor that makes your writing bold and clear, with AI rewriting.