Grammarly vs Paperpal

Grammarly

• People who write across many apps and want the same checks in each
• Teams of up to 149 that need a shared style guide and brand tone
• Students who want citation, plagiarism and AI-detection checks in one editor

Paperpal

• Researchers preparing manuscripts for journal submission
• Students writing theses and essays who need citation help
• Non-native English speakers polishing academic prose
• Writers who want checks inside Word, Google Docs or Overleaf

Grammarly

• The Free plan is capped at 100 AI prompts a month and leaves out full-sentence rewrites and tone adjustments.
• Pro costs $30 per member a month on monthly billing, against $12 a month when billed annually.
• Pro stops at 149 seats; larger organizations need Enterprise, which is priced through sales.
• Advanced grammar, clarity and tone suggestions cover six languages; the other supported languages get spelling and basic grammar only.

Paperpal

• The Free plan stops at 200 grammar edits a month and 5 uses a day of the paraphrase, translate and research tools.
• Plagiarism checks have a monthly word cap on every paid plan; going over it means buying a one-time add-on valid for a month.
• The one-time multi-year option exists for Prime only, and the full Journal Fit report needs Pro.
• No desktop or mobile app is listed: it runs on the web, in a Word add-in and in Chrome and Edge extensions.

Grammarly

Grammar, spelling and tone checks

Corrects spelling and grammar and shows the tone of a message on every plan. Full-sentence rewrites and one-click tone adjustments are part of Pro.

Works inside other apps

Desktop apps for Windows and Mac, extensions for Chrome, Safari, Firefox and Edge, and iPhone, iPad and Android apps bring suggestions into tools such as Gmail, Google Docs, Word and Slack.

Docs and AI agents

Docs is a browser-based document editor with agents including AI Grader, Citation Finder, Reader Reactions, Humanizer and Paraphraser. Some agents are limited to Pro.

Generative AI prompts

Drafts and reworks text from a prompt. The allowance is 100 prompts a month on Free, 2,000 per member on Pro and unlimited on Enterprise.

Plagiarism and AI detection

Scans a document for text that matches other sources and for passages likely to be AI-generated. The plans page lists both checks under Pro.

Team style controls

Pro team accounts get style guides, brand tones, knowledge share, snippets and usage analytics, so a group writes with the same terms and voice.

Paperpal

Grammar and consistency checks

Suggests grammar, tone and consistency fixes tuned to academic writing. The Free plan allows 200 edits a month, Prime 20,000 and Pro has no cap.

Paraphrase, trim and translate

Rewrites sentences in an academic tone, cuts word count and translates text, with translation powered by DeepL in over 30 languages.

Research and citations

Answers questions with cited findings from more than 300 million research articles and formats citations in over 10,000 styles.

Chat with PDFs and a library

Upload papers and ask questions about them: 5 files a month on Free, 150 on Prime and 500 on Pro, with library storage from 300 MB to 10 GB.

Plagiarism and AI detection

Checks similarity against a stated 99 billion sources and flags AI-written text. Plagiarism checks are capped at 10,000 words a month on Prime and 30,000 on Pro.

Submission readiness checks

Runs more than 30 pre-submission checks on language, structure, figures, disclosures and metadata. The full Journal Fit report is limited to Pro.

Grammarly

• Free$0

  Spelling and grammar corrections, tone detection and 100 AI prompts a month, for individuals.

• Pro$12

  per member / month, billed annually ($30 billed monthly)

  Full-sentence rewrites, tone adjustments, style guides and brand tones, and 2,000 AI prompts a month. Sold for 1 to 149 seats.

• EnterpriseCustom

  Unlimited members and AI prompts, dedicated support, confidential mode, granular roles and data loss prevention. Sold through Superhuman Go.

Paperpal

• Free$0

  200 grammar edits a month, 5 writing and research uses a day, chat with 5 files a month and 300 MB of library storage. No card required.

• Prime$12

  per month, billed annually ($144); $25 billed monthly

  20,000 grammar edits, 10,000 words of plagiarism checks, 25,000 words of AI detection and 500 writing and research uses a month, with 2 GB of storage.

• Pro$29

  per month, billed annually ($348); $59 billed monthly

  Unlimited grammar edits, AI detection and writing tools, 30,000 words of plagiarism checks a month, full Journal Fit reports and 10 GB of storage.

• Enterprise / InstitutionCustom

  Institution-wide pricing with access management and shared libraries, arranged through sales, with a free trial on request.

Grammarly

• Annual discount

  Save up to 60% with yearly billing

  Pro is $12 per member a month when billed annually and $30 when billed monthly. The plan toggle advertises a saving of up to 60% on yearly billing.

• Education

  Discounts for educational institutions

  The plans page FAQ says Grammarly offers discounts for educational institutions. Grammarly for Education is quoted through its education sales team.

Paperpal

• Annual discount

  About half off with annual billing

  Prime costs $144 billed annually against $25 a month ($300 over a year), and Pro $348 against $59 a month ($708), a saving of roughly 51 to 52%.

• Other savings

  Prime Multi-year Saver: one payment for 2 or 3 years

  Prime can be bought for 2 years at $229 or 3 years at $289 as a single payment with no auto-renewal. The option is not offered for Pro.

• Education

  Student discount through an institution email

  Paperpal's pricing FAQ offers a discount to students who sign up with an institution email address and recommend that their institution buy a license.