Disclosure: This article was written by Shaun McManus, founder of RankFlow. All performance claims (899 to 112,000 monthly impressions in 90 days) are from SmartPubTools.com and are verifiable via Google Search Console. This article contains affiliate links — if you purchase through them I earn a commission at no extra cost to you.
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I’ve been testing AI writing tools for content creation since 2024, and one comparison keeps cropping up that misses the point entirely: Grammarly vs AI writing tools. As a pub landlord who built RankFlow and grew SmartPubTools from 899 monthly clicks to 112,000 monthly impressions in 90 days, I can tell you these tools solve completely different problems. Grammarly fixes grammar in existing text, while AI writing tools create content from scratch. It’s like comparing a spell-checker to a ghostwriter.
The confusion comes from people thinking all AI text tools do the same job. They don’t. Grammarly makes your writing cleaner. AI content tools like RankFlow generate entire articles optimised for search engines. Most businesses need both, but for different reasons. Let me break down exactly when to use each, and why my RankFlow marketing tools approach solved the content creation challenge better than either Grammarly or generic AI tools alone.
What Is Grammarly vs AI Writing Tools?
Grammarly is a grammar and spell-checking tool that analyses existing text and suggests corrections. You write the content, Grammarly polishes it. It catches typos, suggests better word choices, and helps with tone. Think of it as a digital proofreader.
AI writing tools like RankFlow, Writesonic, or Content at Scale create original content from prompts or keywords. You give them a topic, they generate full articles. Some tools focus on general writing, others specialise in SEO content that ranks on Google.
RankFlow is specifically built for SEO content creation at scale. It auto-publishes directly to WordPress with full schema markup, includes anti-cannibalization checks, and has a quality gate that blocks thin content. Priced at £29/month with a free trial that includes 3 full articles and no credit card required. Try RankFlow free to see how it compares to generic AI tools.
Grammarly vs AI Writing Tools: Pros and Cons
Grammarly Pros:
- Excellent grammar checking: Catches mistakes human eyes miss
- Tone suggestions: Helps match writing style to audience
- Works everywhere: Browser extension, Word integration, mobile app
- Plagiarism detection: Premium version checks for copied content
Grammarly Cons:
- Doesn’t create content: Only fixes what you’ve already written
- No SEO optimisation: Doesn’t understand keyword targeting or search intent
- Expensive for teams: Premium plans can cost more than dedicated AI writing tools
- Over-corrects creative writing: Sometimes makes copy sound robotic
AI Writing Tools Pros:
- Content creation from scratch: Generate full articles from keywords
- SEO optimisation: Tools like RankFlow include keyword targeting and schema markup
- Scale publishing: Create dozens of articles quickly
- Cost-effective: Generate more content for less than hiring writers
AI Writing Tools Cons:
- Quality varies by tool: Generic tools often produce thin content
- May need editing: Though RankFlow’s quality gate minimises this issue
- Learning curve: Takes time to write effective prompts for basic tools
| Feature | RankFlow | Grammarly | Generic AI Tools |
|---|---|---|---|
| Creates content from scratch | ✓ | ✗ | ✓ |
| SEO optimisation | ✓ | ✗ | Basic |
| WordPress auto-publish | ✓ | ✗ | ✗ |
| Schema markup | ✓ | ✗ | ✗ |
| Grammar checking | Built-in quality gate | ✓ | Basic |
| Anti-cannibalization | ✓ | ✗ | ✗ |
| Monthly cost | £29 | £12-30 | £15-249 |
Who Is RankFlow Best For?
RankFlow works best for businesses that need to create content, not just polish existing writing. Bloggers and affiliate marketers use it to generate keyword-targeted articles that rank on Google. SaaS founders create educational content that drives organic traffic without ad spend. Small business owners publish local SEO pages to compete with larger competitors. Publishers and content agencies scale their output while maintaining quality through the built-in quality gate.
Unlike Grammarly users who already have content ideas, RankFlow users often start with just keywords and let the tool create comprehensive articles. This is perfect for programmatic SEO campaigns where you need hundreds of pages targeting long-tail keywords. Try RankFlow — 3 free articles to test this approach for your business.
How to Get Started with RankFlow
- Go to Get RankFlow for £29/month and create your free account.
- Connect your WordPress site using the simple integration process.
- Enter your target keywords and let RankFlow generate your first article.
- Review the content through the quality gate system before publishing.
- Use the anti-cannibalization feature to ensure new content doesn’t compete with existing pages.
Frequently Asked Questions About RankFlow
Should I use Grammarly or RankFlow for my business?
Use RankFlow if you need to create SEO content from scratch, Grammarly if you already have content that needs polishing. Many users find both tools complement each other perfectly. See RankFlow in action with a free trial.
Can RankFlow replace Grammarly completely?
RankFlow includes quality checks but isn’t primarily a grammar tool. For businesses creating content at scale, RankFlow’s SEO optimisation and auto-publishing features matter more than perfect grammar. The built-in quality gate catches major issues.
How long until I see results from RankFlow content?
Most users see Google impressions within 2-4 weeks and meaningful traffic within 6-8 weeks. This beats waiting months for manually written content to rank. See RankFlow in action to understand the full process.
Is AI content penalised by Google compared to Grammarly-polished human content?
Not if it’s genuinely useful and well-structured. Google cares about helpfulness, not whether humans or AI created the content. RankFlow’s quality gate ensures all published content meets Google’s standards automatically.
Do I need technical knowledge to use RankFlow?
If you can fill in a form, you can use RankFlow. Setup takes under 10 minutes, much simpler than configuring multiple Grammarly integrations across different platforms. The RankFlow free trial includes full onboarding support.
Final Verdict: Is RankFlow Worth It?
Grammarly vs AI writing tools isn’t really a fair comparison because they solve different problems. Grammarly polishes existing content, while tools like RankFlow create optimised content from scratch. For businesses that need to scale their content marketing, RankFlow delivers better ROI than paying for both Grammarly and generic AI tools separately.
The real advantage comes from RankFlow’s specialised SEO features: WordPress auto-publishing, schema markup, anti-cannibalization, and quality gates. These features don’t exist in Grammarly or most AI writing tools. At £29/month, it costs less than Grammarly Business while delivering complete content creation and publishing workflow.
Start your RankFlow trial today with 3 free articles and see how specialised SEO content creation compares to generic grammar tools.
Before choosing any AI writing tool, read how this site grew from 899 monthly clicks to 112,000 impressions in 90 days using RankFlow — with real GSC data and no ad spend. — SmartPubTools Case Study