Semrush SEO Writing Assistant
Semrush SEO Writing Assistant is a real-time content optimization tool that scores and suggests improvements for SEO, readability, originality, and tone while you write.

Key takeaways
- Real-time scoring for SEO, readability, originality, and tone.
- Integrates with Google Docs, WordPress, and Microsoft Word.
- Compares drafts to top-ranking SERP content.
- Includes plagiarism checking and AI rewriting.
- Part of Semrush Content Marketing toolkit.
Use it to align your writing with current search patterns before publishing.
What People Use It For
- Real-time SEO scoring – Get a live score and recommendations for target keywords, readability, and tone.
- SERP comparison – Compare your draft to top-ranking content in Google’s SERPs.
- Plagiarism checking – Ensure originality before publishing.
- AI rewriting – Use built-in AI to rephrase sentences for better clarity or SEO.
- Integration with editors – Works directly in Google Docs, WordPress, and Microsoft Word.
- Content workflow – Part of Semrush Content Marketing toolkit, linking to SEO Content Template and content briefs.
Quick Start Workflow
- Set up target keyword – Enter your primary keyword, location, and device context.
- Open the assistant – Use the Chrome extension in Google Docs or the web editor.
- Write or paste content – The tool scores your draft in real time.
- Review recommendations – Check SEO, readability, originality, and tone scores.
- Apply suggestions – Adjust headings, keyword density, sentence length, and more.
- Check originality – Run plagiarism check before finalizing.
- Export or publish – Copy the optimized content to your CMS.
When Not to Start Here
- If you need a full SEO suite – This tool focuses on content optimization; for keyword research, competitor analysis, or backlink audits, use the full Semrush platform.
- If you write only for print – The tool is designed for web content and SEO.
- If you want a free standalone tool – It is paid; consider Google Trends or Google Search Console for basic insights.
- If you rely solely on the score – The score is a drafting aid, not a ranking guarantee.
Alternatives
| Tool | Key Difference |
|---|---|
| Ahrefs | Stronger backlink analysis and keyword research, but less integrated content editor. |
| Google Search Console | Free, but no real-time writing assistant. |
| Ubersuggest | Lower cost, but fewer content optimization features. |
| Grammarly | Focuses on grammar and tone, not SEO scoring. |
Next step
FAQ
Is Semrush SEO Writing Assistant free?
It is a paid tool with limited free access through Semrush trials or free account tiers.
Does it work with Google Docs?
Yes, it integrates directly with Google Docs via a Chrome extension.
Can I check plagiarism with it?
Yes, it includes originality/plagiarism checking features.
Related topics
Sources
- Semrush Knowledge Base: What is SEO Writing Assistant? — Primary product documentation for core features and workflow.
- Semrush Google Workspace Marketplace listing — Confirms Google Docs integration and editor workflow.
- Semrush Knowledge Base (Spanish version) — Adds detail on keyword, location, and device-based recommendations.
- Google Search Central — Best reference for aligning tool guidance with Google’s content quality and SEO guidance.
Reviewed by Lucía Marín, Founding editor.