Grammarly vs Surfer SEO
A detailed side-by-side comparison to help you choose.
Grammarly
AI writing assistant that checks grammar, style, tone, and clarity across all platforms
Surfer SEO
Data-driven on-page SEO optimization tool that helps you rank higher by analyzing top results
Our verdict
We recommend Grammarly
Grammarly edges ahead with stronger scores in key areas.
Feature Comparison
| Feature | Grammarly | Surfer SEO |
|---|---|---|
| API Access | ||
| Plugins / Extensions | ||
| Image Generation | ||
| Code Execution | ||
| File Upload | ||
| Web Search | ||
| Max Context Window | 16K tokens | N/A |
Pricing Comparison
| Tier | Grammarly | Surfer SEO |
|---|---|---|
| Free | Free Basic grammar & spelling, 100 AI prompts/month | $59 120 documents, track 10 pages, AI SEO guidelines; $49/mo billed yearly (save $120/yr) |
| Pro | $30 2,000 AI prompts/month, full rewrites, plagiarism & AI detection; $12/mo billed annually | $119 360 documents, 25 AI prompts (weekly refresh), 1-click optimization, team collab; $99/mo billed yearly (save $240/yr) |
| Superhuman Business | $40 Email + writing suite, style guides, analytics; $33/member/mo billed annually | $219 360 documents, 50 AI prompts (daily refresh), 5 brand spaces, internal linking; $182/mo billed yearly (save $444/yr) |
| Enterprise | Free Custom pricing; SSO/SAML, SCIM, BYOK, dedicated support | $359 Unlimited documents, 100 AI prompts (daily), uncapped optimization, VIP support; $299/mo billed yearly (save $720/yr) |
| AI Search Analytics | — | $95 Standalone add-on; brand visibility across ChatGPT/Gemini/AI Overviews, 50 prompts daily; $82/mo billed yearly |
| Enterprise | — | $999 From $999/mo tailored packages; advisory-led strategy, SSO, custom limits, white-label |
Score Breakdown
| Dimension | Grammarly | Surfer SEO |
|---|---|---|
| Ease of Use | 10.0 | 8.0 |
| Features | 7.0 | 8.0 |
| Value for Money | 7.0 | 7.0 |
| Support | 8.0 | 7.0 |
| Overall | 8.0 | 7.5 |
Pros & Cons
Grammarly
Pros
- +Works everywhere: browser, Word, Google Docs, Outlook
- +Real-time suggestions don't interrupt your writing flow
- +Tone detection helps match the right voice for your audience
- +Plagiarism checker integrated into premium plans
Cons
- −Premium plan is expensive relative to the feature set
- −Not a full AI writing assistant — focused on editing, not generation
- −Free tier is quite limited compared to competitors
Surfer SEO
Pros
- +Real-time content score as you write guides optimization
- +Analyzes top-ranking pages to guide NLP term usage
- +Google Docs and WordPress integrations for seamless workflow
- +AI outline generator speeds up content planning
Cons
- −No free tier makes it costly to trial
- −Focuses narrowly on on-page SEO — not a full SEO suite
- −Article limits on lower plans can be restrictive