L
LGrammar, spelling and style checker for 30+ languages, with AI rephrasing
Free, from $5.83/mo
Grammarly vs WordAi
Pricing, features, platforms and who each one suits — side by side.
G
Choose Grammarly if…
- you want a free plan to start with
- you work on Chrome, Windows, macOS
- you're in its core audience: students, professionals
W
Choose WordAi if…
- you need an API to build on
- you're in its core audience: seo publishers, content marketers
Side by side
Feature Grammarly WordAi
Pricing modelFreemiumFree trial
Starting price—$9/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, Chrome, Windows, macOS, iOS, AndroidWeb, API
CategoryGrammar & ProofreadingParaphrasing & Rewriting
CompanySuperhuman Platform Inc. · United States · since 2009 · part of SuperhumanCardinell Enterprises LLC dba Cortx · USA
Full feature lists
G Grammarly
- Grammar, spelling and clarity checks
- Full-sentence and paragraph rewrites
- Tone suggestions and adjustment
- AI Detector and Humanizer agents
- Plagiarism checker and citation generator
- Browser extensions for Chrome, Safari, Firefox and Edge
- Microsoft Office and Google Docs integrations
- Brand tone and style guides for teams
W WordAi
- Sentence restructuring and splitting
- Adjustable creativity level
- Up to 1,000 rewrites per article
- Bulk rewriting and bulk export, including spintax
- HTML support and code view
- Spelling and grammar fixes
- Article Forge integration for importing articles
- API for adding rewriting to workflows
Their home pages
What each vendor shows first: the pitch, the plans and the sign-up.
Grammarly · grammarly.com
WordAi · wordai.comWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
What the free plans include
Grammarly
- Generate text with 100 AI prompts (100 prompts / month)
- 1 style guide
- 1 brand tone
- User groups: 2
WordAi
No free plan.
All plans and prices
Grammarly
FreeFree
ProPrice not shown on page ("Try for $0.00" trial only)
EnterpriseCustom
WordAi
Starter$17/mo or $9/mo billed annually
Power$57/mo or $27/mo billed annually
EnterpriseCustom
Price changes we've recorded
We re-read each pricing page every month and log what changed.
Grammarly
- Nov 5, 2026Pro: USD price not shown to our fetcher (EUR only) → $0
- Nov 5, 2026Free: €0 → Free; Pro: €12/member/mo billed annually (€30 billed monthly) → USD price not shown to our fetcher (EUR only)
WordAi
No changes since we started tracking.
Strengths and limitations
Grammarly
- Free plan includes grammar checks and 100 AI prompts a month
- Available on desktop, mobile, browsers, Office and Google Docs
- Pro includes a free trial with a reminder email before it ends
- States it does not sell user content or let third parties train on it
- Free plan lacks tone adjustment and full-sentence rewrites
- Pro limits AI prompts to 2,000 per member per month
- No public API listed
WordAi
- Annual billing cuts the price to $9/mo for Starter
- 3-day free trial plus a 30-day money-back guarantee
- API access on the Starter and Power plans
- Power plan includes 3,000,000 rewrite words a month
- No free plan, only a time-limited trial
- Refund applies only if you have rewritten fewer than 10 articles
- No desktop or mobile apps listed
More comparisons
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L
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GG
Freemium
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AI grammar, spelling and rephrasing help for English writers on any device
Grammar & ProofreadingFree planAPI
W
WW
Free, from $4.89/mo
W
AI rewriting, summarizing and grammar assistant for everyday writers
Paraphrasing & RewritingFree plan
S
SS
Free, from $12/mo
H
HReadability editor that flags wordy, unclear writing and offers AI fixes
From $8.33/mo
H
From $8.33/mo
H
Readability editor that flags wordy, unclear writing and offers AI fixes
Grammar & Proofreading
Facts from each vendor's public pages, prices checked Oct 26, 2026. Editorial policy