Nameryn
Grammarly
Checks and rewrites your writing as you type, anywhere. AI-powered tool, with a free plan; runs on web, desktop, mobile. The stack builder picks it for writing polish.
What it is known for
- Strengths: grammar, spelling and tone correction; sentence and paragraph rewriting; plagiarism and AI-text detection.
- For: individuals, students, teams, businesses and schools.
- Runs on: web, Windows, Mac, iPhone, iPad, Android, browser extensions.
- Learning curve: easy: works in a few clicks, not a few hours.
- Works with: Microsoft Office, Google Docs and Chrome, Safari, Firefox and Edge extensions.
Read on October 9, 2026 from grammarly.com.
Plans and prices
| Plan | Price | What you get |
|---|---|---|
| Free | Free | 100 AI prompts/month; basic spelling and grammar |
| Pro | $12/mo | The plans page shows $12 a month in USD and no other billing option; 2,000 AI prompts, full-sentence rewrites, tone, plagiarism and AI detection |
Checked by hand against grammarly.com/plans on October 10, 2026; confidence high. Prices are monthly in US dollars unless the row says otherwise; the builder counts the plan it starts on, Pro.
When the stack builder picks it
The builder reads each job's rules from the top and takes the first step whose conditions hold and whose plan fits the money left. Grammarly is named in these steps:
- Writing polish, step 2 of 3, when less than $12 is left for it: the free plan; the step also names QuillBot, and the best score takes it.
- Writing polish, step 3 of 3, otherwise: Pro ($12/mo); the step also names ChatGPT, Claude, Gemini and QuillBot, and the best score takes it.
The rules are public in stack-rules.json, and how the stack builder scores explains the tie-break.
Alternatives the same rules name
- QuillBot: Paraphrases, checks grammar and tone, and summarises, in the browser, Word and on your phone. From free.
- ChatGPT: OpenAI's assistant for writing, research and everyday questions. From free.
- Claude: Anthropic's assistant for writing, analysis and long documents. From free.
- Gemini: Google's assistant, tied into Gmail, Docs and Search. From free.
Signals and what people say
- Hacker News, 30 days to October 7, 2026: 3 stories
Change log
- October 10, 2026: Pro moved from $30 to $12, on grammarly.com/plans.
- October 6, 2026: plans and prices first recorded from grammarly.com/plans.
Logo: Simple Icons 16.34.0, icon "grammarly" (Grammarly), CC0 1.0 for the icon file; the mark belongs to its owner.