Prose

7.1easy start · #44of 88
in Grammar checkers

Free to practise onyes
Well documentedyes
Runs where you workno

Runs on Browser. Paid plans from $10/mo.

Prose is ranked #44 of 88 in grammar checkers on The Geeks Club, made by Prose (Prague, Czech Republic). It runs on Browser extension. There is a free plan. Paid plans start at $10/mo.

Prose plans and pricing

All plans

Free — your own API key Free Use your own API key; usage is billed by your provider. Unlimited fixes useprose.app · 21 Sept 2026

Buy credits $10/mo One-time purchase; no recurring billing. Credits never expire useprose.app · 21 Sept 2026

Your own API key Free Usage billed by your provider Unlimited fixes · OpenAI, Claude, or Gemini · Requires your own API key useprose.app · 7 Oct 2026

Buy credits $10 once One-time No API key required · Credits never expire · Top up anytime useprose.app · 7 Oct 2026

Compared on grammar checkers

Free plan: Yes
Browser extension: Yes
Desktop app: No
Style suggestions: Yes
Tone detection: Yes

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The record

What it does: Prose is a Chrome extension for fixing grammar and spelling in selected text while keeping the writer’s voice.
How it works: Select text, choose “Fix my text” from the right-click menu, then paste the corrected text from the clipboard.
Supported sites: The maker says it works anywhere you can type in Chrome, including Gmail, Slack, Notion, LinkedIn, and Google Docs.
AI providers: The maker lists OpenAI, Claude, and Gemini as supported providers for the free own-key option.
Privacy: Only selected text is sent when the user requests a fix; with an own API key, it goes directly from the browser to the chosen provider without passing through Prose servers.
Data handled: For credit users, the privacy policy lists email address for PIN authentication and server-side credit balance; extension settings are stored locally in the browser.
Limitations: The terms describe Prose as intended for plain text and do not promise formatting preservation, translation, perfect accuracy, uninterrupted availability, or compatibility with every site or input field.
Who it is for: The Chrome Web Store listing describes it for professionals writing emails and messages, non-native speakers seeking natural writing, and people who prefer choosing their AI models.
Support: The terms give [email protected] as the contact email for the operator.
Platform availability: The maker describes Prose as a desktop-only Chrome extension.
Headquarters: Prague, Czech Republic
Price from: $10/mo

Where it ranks on The Geeks Club

Best Grammar Checkers in 2026#44 of 88

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Sources

useprose.app· checked 7 Oct 2026
useprose.app/privacy/· checked 7 Oct 2026
useprose.app/terms/· checked 7 Oct 2026
chromewebstore.google.com/detail/prose-ai-grammar-spell-ch/ijejgo· checked 7 Oct 2026