A content optimizer reads the pages that rank for your keyword and tells you what your draft is missing.
Useful. But the same job costs $0 in one tool and $129 a month in another, and each vendor counts it differently.
Prices and plans in this category change often. Surfer has even moved to a new domain, surfer.ai.
We checked 11 tools on their own pricing pages on 10 November 2026. We compared listed prices and limits; we didn't run test articles.
No budget? The free seotools.pro Content Optimizer scores a draft with no account and runs 3 live top-10 analyses a day.
Low budget, steady output? NeuronWriter Bronze ($23 a month) or seotools.pro Lite, $24 a month ($20 yearly) for 10 docs.
Content team with a budget? Surfer ($59 a month, or $49 billed yearly) or Clearscope ($129 a month, unlimited users).
- Check the unit first: documents, articles, drafts, credits, reports or queries.
- Entry plans run from $23 to $129 a month on monthly billing. MarketMuse publishes no prices.
- Per unit on monthly billing, entry plans run from $2.40 a doc (seotools.pro Lite) to $11.80 per new article (Scalenut Starter), by our arithmetic.
- A content score isn't a ranking factor. Ahrefs found only weak correlations between scores and rankings.
- Google has no preferred word count. Use length targets as a range, not a goal.
Content optimization tools at a glance
| Tool | Entry plan | Price a month* | What the plan includes | Best for |
|---|---|---|---|---|
| seotools.pro Content Optimizer | Free; Lite | Free; $24 ($20 yearly) | 3 free analyses a day; Lite 10 docs a month | Free scoring, then a low monthly price |
| Surfer | Discovery | $59 ($49 yearly) | 120 documents a year (yearly plan), 1 seat | Writers who want a guided editor |
| Clearscope | Essentials | $129 | 20 drafts a month, unlimited users | Teams that share one account |
| Frase | Starter | $49 ($39 yearly) | 10 articles a month, 1 seat | Briefs plus drafts in one tool |
| NeuronWriter | Bronze | $23 (about $19 yearly) | 25 documents, 2 projects | Lowest listed entry price |
| MarketMuse | Free; Optimize | Free; paid by demo | Free 10 queries a month | Topic planning at scale |
| Semrush Content toolkit | Base | $60 | 10,000 articles and 5 SEO content boosts a month | Teams already on Semrush |
| Ahrefs Content Kit | Add-on | From $99, plus a plan | AI Content Helper and Grader | Teams already on Ahrefs |
| PageOptimizer Pro | Basic | $40 | 20 credits; Unlimited plan $72 | Many on-page reports |
| Dashword | Startup | $99 | 30 content reports, 5 seats | Small teams, simple editor |
| Scalenut | Starter | $59 ($21 yearly, promo) | 5 new and 5 optimized articles a month (monthly plan) | AI drafts plus optimization |
*USD, before tax, monthly billing; yearly price per month in brackets where listed. Vendor pricing pages checked 10 November 2026.
What to look for
Every tool here does the same core job. It pulls the top results for your keyword and turns them into targets for your draft.
So judge the parts that differ:
- Live data: does it read today's results, for your country?
- The score: can you see how it's calculated, or is it a black box?
- The unit: what one "document", "draft" or "credit" buys, and how many you get.
- Seats: one writer, or the whole team?
- The workflow: brief, editor, AI draft, publishing, or only a score.
Keep the score in its place. Google's own guidance on people-first content asks:
"Are you writing to a particular word count because you've heard or read that Google has a preferred word count? (No, we don't.)"
Google Search Central, Creating helpful, reliable, people-first content (updated 5 October 2026)Ahrefs, which sells a content optimizer itself, tested 5 tools' scores against rankings on 20 keywords. Si Quan Ong summed up the result:
"We found weak correlations everywhere."
Si Quan Ong, Ahrefs, in Do Higher Content Scores Mean Higher Google Rankings?He adds a warning worth remembering: "Keyword density is not topic coverage." Use the score to find gaps, not to chase 100.
Google says the same about tools in general:
"Third-party tools don't have access to our internal ranking data. They can't guarantee performance."
Google Search Central, Google Search's Guidance on Third-Party SEO Tools & Advice (updated 5 June 2026)How we compared
- Prices, plans and limits come from each vendor's pricing page or help centre, checked on 10 November 2026.
- Where a page loads prices with JavaScript, we read the page code too.
- We didn't write test articles in these tools, so we make no claims about score accuracy or rankings.
- The price per article is our own arithmetic: entry price divided by the monthly allowance the vendor lists.
- seotools.pro makes one of these tools. We list it first because it's the only free option here with live analysis and no account. Weigh that.
The 11 tools
1. seotools.pro Content Optimizer: free, then $24 a month ($20 yearly)
Paste a draft and the score moves as you type. There's no analyze button for the score itself.
- Free, no account: live content, readability and SEO scores, plus 3 SERP and term analyses a day.
- Live SERP: it reads the current top 10 for your keyword in 31 countries and pulls the 25 to 40 terms they share.
- Open scoring: the page lists every check and threshold behind the score.
- Paid: AI writing, rewrite modes and WordPress publishing. Lite is $24 a month ($20 yearly) for 10 docs a month.
Choose it if you want to try optimization for free, or need a low monthly price. Open the Content Optimizer.
2. Surfer
Surfer now lives at surfer.ai. Its entry plan, Discovery, costs $59 a month, or $49 a month billed yearly.
- Allowance: "Create or Optimize 120 Documents" on the yearly plan; credits reset yearly.
- Seats: 1 on Discovery; Standard ($119, or $99 yearly) has 3 and 360 documents.
- AI tracking: Discovery tracks 0 AI prompts; Standard tracks 25, refreshed weekly.
On yearly billing, Discovery works out at about $4.90 per document. We couldn't confirm the allowance on monthly billing.
Choose it if you want the best-known guided editor and can pay yearly.
3. Clearscope
Essentials costs $129 a month with 20 drafts a month, 50 tracked queries and 50 pages.
- Users: unlimited on every plan. That's rare in this list.
- Extra drafts: $50 per 10 on Essentials.
- Yearly: no public yearly price; Clearscope invoices custom yearly plans.
Choose it if several writers and editors need one shared account.
4. Frase
Starter costs $49 a month, or $39 billed yearly ($468 a year). It includes 10 articles and 50 audit pages a month.
That's $4.90 per article on monthly billing. Professional ($129, or $103 yearly) gives 3 seats and 40 articles.
Choose it if you want briefs, drafts and optimization in one place. There's a 7-day trial with no card.
5. NeuronWriter
Bronze costs $23 a month, or $230 a year. It includes 2 projects, 25 documents and 15,000 AI credits.
Unlimited team members start on Gold ($69 a month). The page shows prices with a "$" sign and no currency code.
Choose it if price is your main filter. In the Ahrefs study, NeuronWriter's score was one of the two that "fared the best".
6. MarketMuse
MarketMuse shows no prices. Every paid plan says "Book a demo". The free plan gives 1 user and 10 queries a month.
Optimize includes 100 queries, 100 tracked topics and 5 content briefs a month. Lists that quote MarketMuse prices can't be checked against its page.
Choose it if you plan whole topic clusters and are happy to talk to sales.
7. Semrush Content toolkit
Semrush now sells content features as a toolkit. Base costs $60 a month on its pricing page, on monthly or annual billing.
- Allowance: 10,000 articles and 5 SEO content boosts a month.
- Optimization: "SEO, tone, and readability tips" are included.
- Extra users: $20 a month each.
The SEO Writing Assistant isn't named on today's pricing pages, so check with Semrush before you plan around it.
Choose it if your team already works in Semrush.
8. Ahrefs Content Kit
Ahrefs sells AI Content Helper and AI Content Grader as the Content Kit add-on, "From $99/mo".
It's an add-on to an Ahrefs plan. Lite costs $129 a month, so the cheapest full setup is well above the rest of this list.
Choose it if you already pay for Ahrefs. Its score is the other one that "fared the best" in Ahrefs' own study.
9. PageOptimizer Pro
Basic costs $40 a month with 20 credits for reports and other POP tools.
Unlimited costs $72 a month ($62 yearly) and allows unlimited POP reports under a fair-use policy.
Choose it if you re-run on-page reports a lot and want a flat price.
10. Dashword
Startup costs $99 a month with 30 content reports, 5 user seats and an AI writer (100k words).
Your first report is free with no card. Annual billing saves 20%, set up through support.
Choose it if a small team wants a simple editor and seats included.
11. Scalenut
Starter costs $59 a month on monthly billing, with 5 new and 5 optimized articles a month.
A limited-time deal cuts yearly plans by 65% (Starter $21 a month) and triples the limits. Deal purchases are non-refundable.
Choose it if you want AI drafts and optimization in one plan. That's $11.80 per new article on monthly billing, or $5.90 if you count the 5 optimizations.
Where seotools.pro fits
An optimizer is one step. The result depends on what you do before and after it. Here is a free workflow on seotools.pro:
- Pick the keyword: Keyword Research shows volume, a 0–100 difficulty score, intent and a 12-month trend.
- Read the results: the SERP Analyzer shows ranking pages, SERP features and intent clues.
- Plan the page: the Content Brief Generator organizes intent, angle, headings, questions and links.
- Write and score: the Content Optimizer compares your draft with the live top 10.
- Check clarity: the Readability Checker gives grade level and 5 readability formulas.
Paid plans: Lite $24 a month ($20 yearly, 10 docs), Pro $49 ($41 yearly, 50 docs), Business $99 ($83 yearly, 200 docs). See pricing.
Comparing with Surfer specifically? Read our free Surfer SEO alternatives comparison.
Paste a draft, add your keyword, and see what the ranking pages cover that you don't.
- Live content, readability and SEO scores, no account needed
- 3 free top-10 analyses a day, 31 countries
- Pair it with the free SEO content brief template
Which one to pick
No budget? seotools.pro's free Content Optimizer, plus the free SEO content brief template. MarketMuse's free plan adds 10 queries a month.
Under $25 a month? NeuronWriter Bronze ($23) or seotools.pro Lite, $24 a month ($20 yearly).
A team on one account? Clearscope (unlimited users) or Dashword (5 seats).
Already on a suite? Semrush Content toolkit ($60) or the Ahrefs Content Kit (from $99, plus a plan).
Rather have it done for you? Our SEO & GEO services team can plan, write and optimize the pages. Book a free consultation with Anatolii Ulitovskyi.
FAQ
What is the best free content optimization tool?
The seotools.pro Content Optimizer scores drafts with no account and runs 3 live top-10 analyses a day. MarketMuse has a free plan with 10 queries a month.
How much does Surfer cost now?
Discovery costs $59 a month, or $49 a month billed yearly, on surfer.ai (checked 10 November 2026). The yearly plan includes 120 documents.
Does a higher content score mean higher rankings?
Not directly. Ahrefs found weak correlations between scores and rankings across 5 tools. Use the score to spot missing subtopics.
How long should my article be?
As long as the topic needs. Google says it has no preferred word count. Treat a tool's length target as a range from the current results.
Is Semrush SEO Writing Assistant still available?
It isn't named on Semrush's pricing pages today. Semrush sells a Content toolkit (Base, $60 a month) with content optimization tips.
Sources
seotools.pro (checked 10 November 2026): Content Optimizer, Content Brief Generator, SERP Analyzer, Readability Checker, Keyword Research, pricing, SEO content brief template.
Content optimization tools (checked 10 November 2026): Surfer, Clearscope, Frase, NeuronWriter, MarketMuse, PageOptimizer Pro, Dashword, Scalenut.
SEO suites (checked 10 November 2026): Semrush Content toolkit pricing and limits; Ahrefs pricing.
Google (checked 10 November 2026): people-first content, guidance on third-party SEO tools.