H
HReadability editor that flags wordy, unclear writing and offers AI fixes
From $8.33/mo
Grammarly vs Paraphraser.io
Pricing, features, platforms and who each one suits — side by side.
G
Choose Grammarly if…
- you work on Windows, macOS, iOS
- you're in its core audience: students, professionals
P
Choose Paraphraser.io if…
- you need an API to build on
- you're in its core audience: students, content writers
Side by side
Feature Grammarly Paraphraser.io
Pricing modelFreemiumFreemium
Starting price—$3.96/mo
Free plan
Free trial
API
Open source
Trains AI on your contentYes, unless you opt out—
Data retentionSaved documents kept until you delete them or your account—
Security and complianceSOC 2 Type II—
AI rewrites—
Plagiarism checker—
AI text detection—
Non-English checking—
Word/Google Docs add-in—
Browser extension—
Custom style guide—
PlatformsWeb, Windows, macOS, iOS, Android, ChromeWeb, API
CategoryGrammar & ProofreadingParaphrasing & Rewriting
CompanySuperhuman Platform Inc.—
Based inUnited States—
Founded2009—
Part ofSuperhuman—
Key features
G Grammarly
- Real-time spelling, grammar and clarity checks
- Paragraph and full-sentence rewrites
- Tone suggestions for different audiences
- Reader Reactions predicts how readers respond
- AI Detector and Humanizer agents
- Plagiarism checker and citation generator
- Works in MS Office, Google Docs and browsers
- Enterprise style guides, brand tones and DLP
P Paraphraser.io
- 10+ paraphrasing modes, including Academic, Formal and Humanize
- Custom tone mode
- Click-to-swap synonym suggestions
- Frozen words to protect key terms
- Text extraction from images and screenshots
- Speech-to-text and recorded audio input
- File upload
- Support for 20+ languages
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Grammarly
Free€0
Pro€12/member/mo billed annually (€30 billed monthly)
EnterpriseCustom
Paraphraser.io
FreeFree
Silver$4.55/week
Gold$9.55/month
Diamond$0.99/week, billed annually at $47.52
Strengths and limitations
Grammarly
- Free plan includes grammar checks and 100 AI prompts a month
- Available on desktop, mobile, browser extensions, MS Office and Google Docs
- Pro includes plagiarism and AI-text detection
- Enterprise offers SSO, SCIM, BYOK and data loss prevention
- Pro costs €30 when billed monthly versus €12 billed annually
- Free plan is limited to 100 AI prompts per month
- Enterprise pricing is not published
Paraphraser.io
- Free tier with five modes and no daily cap
- Supports more than 20 languages
- Accepts image, audio and file input
- Annual Diamond plan works out to about $3.96 per month
- API access only on the Diamond plan
- Advanced modes such as Creative and Academic require a paid plan
- Paid plans cap the total words and paraphrases
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Built from each vendor's public website; we haven't tested them hands-on. Editorial policy