Grammarly vs Semrush
A head-to-head comparison of Grammarly and Semrush for ai writing & marketing. Updated April 2026
Quick verdict
Grammarly takes it with an overall score of 8/10 vs Semrush's 8/10. Grammarly also offers a free plan to get started.
Score comparison
| Category | Grammarly | Semrush |
|---|---|---|
| Ease of Use | 9.0 | 6.0 |
| Features | 8.0 | 10.0 |
| Value for Money | 8.0 | 7.0 |
| Output Quality | 8.0 | 9.0 |
| Support | 7.0 | 8.0 |
| Overall | 8.0 | 8.0 |
Grammarly
AI writing assistant for grammar, clarity, and tone
Pros
- Excellent grammar and spelling correction
- Works everywhere (browser, desktop, mobile)
- Tone detection is genuinely useful
- Strong free tier
Cons
- AI generation features are mediocre
- Premium feels necessary because the free version is limited
- Can be overly aggressive with suggestions
Best for
- • Professionals
- • Students
- • Non-native English speakers
Semrush
All-in-one SEO and digital marketing platform with AI features
Pros
- Most comprehensive SEO toolkit available
- AI content tools are genuinely useful
- Competitive analysis is best-in-class
- Consolidates multiple tool subscriptions
Cons
- Steep learning curve for new users
- Expensive entry point at $139/mo
- Per-user pricing on team features
Best for
- • SEO professionals
- • Content marketers
- • Digital marketing agencies
The bottom line
Both Grammarly and Semrush are solid choices for ai writing & marketing. Grammarly takes our recommendation with an overall score of 8/10. Grammarly remains the most reliable AI writing assistant for everyday use. The grammar and clarity suggestions are consistently helpful, and the tone detection feature is genuinely useful for professional communication. The AI generation features are less impressive than dedicated writing tools.
That said, Semrush (8/10) has its own strengths. Semrush is the most comprehensive SEO and digital marketing toolkit available. The AI features (ContentShake, SEO Writing Assistant, and AI-powered insights) add genuine value on top of an already dominant platform. Expensive, but it consolidates what would otherwise be 4-5 separate subscriptions.
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