I used to spend 90 minutes per article just on SEO research—analyzing top-ranking pages, extracting keywords, identifying content gaps, and building outlines. Then I discovered SEO content tools that automate this entire process in under 10 minutes.
After testing Frase, Surfer SEO, and Scalenut on dozens of client projects over the past year, I’ve learned which tool delivers the best ROI for different types of freelance SEO writing. The answer isn’t universal—it depends on your workflow, client expectations, and whether you prioritize research speed, optimization accuracy, or all-in-one convenience.
Here’s exactly what each tool does well, where it disappoints, and which one deserves your subscription dollars. For a complete overview of all AI writing tools including non-SEO options, see our comprehensive guide to the best 27 tools for freelancers.
What These Tools Actually Do
SEO content tools analyze top-ranking pages for your target keyword, extract the topics and subtopics they cover, identify semantic keywords to include, and score your content in real-time as you write. They bridge the gap between keyword research and actual writing—turning SERP analysis into actionable content briefs.
Frase focuses on research automation and content brief generation. Input a keyword, and Frase analyzes the top 20 results, extracts key questions, suggests headings, and creates an organized brief you can write from or share with clients.
Surfer SEO specializes in real-time content optimization with its Content Score that updates as you write. The editor shows exactly how your draft compares to top-ranking pages and recommends keyword usage, content length, and structural improvements.
Scalenut offers the most complete workflow—from keyword research to brief generation to AI drafting to optimization—all in one platform. It’s positioned as an all-in-one solution for teams scaling content production.
Pricing: Investment vs. Value
Frase starts at $15/month for the Solo plan with 10 articles, $45/month for Basic (30 articles), or $115/month for Team (unlimited). This makes it the most affordable entry point for freelancers testing SEO tools
Surfer SEO costs $89/month for the Hobby plan with 30 articles, $219/month for Professional (100 articles), or custom enterprise pricing. It’s significantly more expensive but includes content audits and deeper optimization features.
Scalenut offers $39/month for the Growth plan (30 articles), $79/month for Pro (75 articles), or custom pricing for agencies. This mid-tier pricing includes AI writing, keyword clustering, and NLP optimization—making it the best value for features-per-dollar.
For budget-conscious freelancers, Frase wins on affordability. For feature depth, Scalenut offers the most bang for your buck.
Research and Brief Generation: Where Frase Excels
Frase is unmatched for content brief creation. The research dashboard analyzes top-ranking competitors, extracts their H2/H3 structure, identifies commonly covered topics, and pulls questions from People Also Ask sections. This data is organized into a clean, shareable brief perfect for pitching clients or guiding your writing.
I use Frase for every SEO project because it turns 60-90 minutes of manual competitor analysis into a 5-minute automated process. The briefs are so comprehensive that clients often ask if I spent hours researching—I just smile and say “thorough preparation.”
Surfer SEO includes SERP analysis but it’s less organized than Frase. The Content Editor shows what terms top pages use and suggests structure, but there’s no dedicated brief-building interface. You’re essentially extracting insights while writing rather than planning upfront.
Scalenut offers similar brief generation to Frase with its Cruise Mode feature. You input a keyword, and it builds outlines, suggests talking points, and generates FAQs based on SERP data. Quality is comparable to Frase, and the integration with AI drafting makes the workflow smoother if you use both features.
For freelancers who create detailed content strategies for clients, Frase’s brief generation is the cleanest
Real-Time Optimization: Surfer’s Competitive Edge
Surfer SEO dominates real-time optimization with its Content Score that updates as you type. The editor analyzes your draft against top-ranking pages and shows whether you’re using keywords too much or too little, if your content is too short or too long, and which semantic terms you’re missing
The Content Score has a stronger correlation with rankings than backlinks, according to Surfer’s data. I’ve seen articles jump from page 3 to page 1 within weeks just by following Surfer’s recommendations during writing
The Auto-Optimize feature analyzes your draft and adds missing NLP terms automatically, boosting your score instantly. This saves 15-20 minutes of manual optimization per article
Frase includes a content optimization editor with keyword density tracking and basic scoring, but it’s not as sophisticated as Surfer. The interface feels more static—you check your score periodically rather than watching it update in real-time
Scalenut offers real-time SEO scoring similar to Surfer, with NLP keyword recommendations and competitor comparison. Quality is solid, though the scoring algorithm feels slightly less refined than Surfer’s. Still, for the price difference ($39 vs $89), it’s impressively close
For writers who want the most accurate, data-driven optimization, Surfer SEO is worth the premium price
AI Writing Integration: Scalenut’s All-in-One Advantage
Scalenut includes AI content generation directly in the optimization workflow. The Cruise Mode feature builds keyword-driven outlines and generates draft paragraphs section by section, then scores them for SEO as it goes. This integrated approach saves switching between separate writing and optimization tools.
Higher-tier plans include unlimited AI content generation, making Scalenut competitive with dedicated writing tools like Jasper or Writesonic while also handling SEO optimization
Frase added AI writing features recently, but they feel like an add-on rather than core functionality. Quality is decent for first drafts, but the AI models aren’t as sophisticated as dedicated writing platforms
Surfer SEO doesn’t include AI writing at all—it’s purely an optimization tool. You write content elsewhere (or use their Surfy AI assistant for rewrites and tweaks), then optimize it in Surfer’s editor. This focused approach works well if you prefer writing manually or using ChatGPT/Claude for drafts
For freelancers who want research, writing, and optimization in one platform, Scalenut delivers the most complete workflow. To learn more about using ChatGPT and Claude effectively for content creation, check out our practical prompts guide.
Ease of Use and Learning Curve
Frase has the simplest interface—clean, organized, and intuitive. New users can create their first content brief within 10 minutes of signing up. The learning curve is minimal, making it ideal for freelancers who want quick results without extensive training.
Scalenut is also user-friendly with clear workflows guiding you from keyword research to published content. The interface includes helpful prompts and structured steps, though the sheer number of features creates a slightly steeper learning curve than Frase
Surfer SEO is more complex due to its depth. The Content Editor includes dozens of data points, NLP terms, and structural recommendations that can feel overwhelming initially. After 2-3 articles, the interface clicks, but expect to invest 30-60 minutes understanding the dashboard
For beginners or time-pressed freelancers, Frase is the fastest to master
Best Use Cases: When to Choose Each Tool
Choose Frase if:
- You create detailed content briefs for clients or teams
- Research automation is your priority over real-time scoring
- Budget is tight and you need affordable SEO assistance ($15/month entry)
- You prefer planning content upfront rather than optimizing as you write
- Simplicity and speed matter more than advanced features
Choose Surfer SEO if:
- Clients measure success by rankings and you need maximum optimization accuracy
- You write content manually or use ChatGPT/Claude for drafts
- Real-time feedback improves your writing quality and speed
- You manage large content libraries that need ongoing audits
- Budget allows premium pricing for best-in-class optimization
Choose Scalenut if:
- You want research, AI writing, and optimization in one platform
- You’re scaling content production (multiple articles weekly)
- Mid-tier pricing ($39-79/month) fits your budget better than Surfer’s $89+
- You prefer structured workflows that guide the entire content process
- You need keyword clustering and topic planning alongside writing tools
My Actual Workflow (And Why)
I subscribe to Frase ($45/month for 30 articles) because content brief generation is the biggest time-saver in my workflow. I create Frase briefs for every SEO project—they impress clients and guide my writing efficiently
For optimization, I use ChatGPT Plus to draft articles based on Frase briefs, then manually check keyword usage and content length against competitors. This hybrid approach costs $65/month total (Frase + ChatGPT) versus $89/month for Surfer alone, and I maintain 90% of the optimization quality.
I don’t subscribe to Scalenut or Surfer currently because Frase + ChatGPT covers my needs at lower cost. But if I were scaling to 50+ articles monthly or working with clients obsessed with rankings, Surfer would be my next addition
To learn more about maximizing productivity across your entire workflow, read our guide on using AI tools to 10x your productivity.
What These Tools Won’t Do
None of these tools guarantee rankings—they optimize for best practices based on current SERPs, but algorithm updates, backlink profiles, and domain authority still matter significantly.
The AI writing features in Frase and Scalenut produce drafts that require substantial editing for voice, accuracy, and expertise. Don’t expect to publish AI-generated content unedited and see results.
Real-time scoring creates a temptation to over-optimize—stuffing keywords to hit 100% scores rather than writing naturally for readers. The best content balances SEO recommendations with genuine value and readability.
The Bottom Line
These aren’t competing tools as much as tools for different priorities. Frase is the research and planning specialist. Surfer is the optimization perfectionist. Scalenut is the all-in-one convenience option.
For most freelance SEO writers, the best strategy is:
- Start with Frase at $15/month to test whether SEO tools improve your workflow
- Master content brief creation and see if clients notice improved structure
- Upgrade to Surfer SEO if clients demand top rankings and you can justify $89/month
- Consider Scalenut if you want AI writing included and prefer mid-tier pricing
You don’t need all three. But understanding what each does best helps you choose the tool that solves your specific bottleneck—whether that’s research time, optimization accuracy, or end-to-end workflow efficiency.
If SEO content is your primary income source, one of these tools pays for itself within 2-3 articles through time saved and improved client results.
For comprehensive tool recommendations across all writing categories, refer back to our complete guide to AI writing tools for freelancers.
A.G. Makoudi is a tech writer specializing in SaaS tools and digital solutions, helping readers simplify technology and make smarter software choices.
