PaperRater

paperrater.com · checked 9 Oct 2026

#23 · AI writing assistants

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How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on AI writing assistants6.1#23 of 25

Pricing

Premium20 pages per submission · 200 submissions per month · 25 plagiarism checks per monthOn request
Premium20 pages per submission · 200 submissions per month · 25 plagiarism checks per monthOn request
FreeGrammar checker is free; page and monthly submission limits are not stated on the currently accessible pageFree

As paperrater.com lists them, checked 20 Sept 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: paperrater.com
Price: Free tier
Free trial: Not stated
AI methods: PaperRater says its automated proofreading uses machine learning and natural language processing to analyze text and generate advice.
Data handling: The grammar checker page states that PaperRater does not store users’ data or save their writing.
Feedback: The checker provides real-time feedback and explanations to help users improve their writing skills.
Headquarters: San Francisco, California, United States
Input and export: Users can type, paste, or upload content, then copy or export corrected text.
Languages: The checker says it supports grammar checks in a variety of languages and English dialects at no additional cost.
Ownership: The site footer identifies PaperRater, Inc. and displays a 2026 copyright notice.
Plagiarism checking: PaperRater describes itself as an online writing analysis tool that checks grammar errors, plagiarism, and more.
Review controls: Users can accept all suggested corrections or review suggestions individually and accept or reject them.
Suggestion quality: PaperRater says its grammar-checking algorithms are trained and monitored by professional linguists.
Use case: The grammar checker page says it can correct any type of written content.
Writing errors: The AI Grammar Checker identifies spelling, grammar, and punctuation mistakes and suggests corrections.

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AI writing assistants#23 of 25

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