10 Best On-Page SEO Analysis Tools in 2026 (Free and Paid, Compared)

Quick comparison

The best on-page seo analysis tools

#1

Surfer

Best for: Content teams and solo writers who want live scoring against top-ranking pages for every article

Visit surferseo.com

Starting price$59/month (Discovery; $49/month billed annually)

Free planNo — 7-day money-back guarantee

Surfer built its reputation on one thing: telling writers exactly what the top-ranking pages do so they can match it. The Content Editor grades drafts on word count, headings, structure and related terms, and the score moves as you edit, which makes it the most hands-on tool in this list. The Discovery plan costs $59 a month ($49 billed annually) and covers 120 documents, keyword research, a topical map and content audits.

The catch is scope. Discovery tracks no AI prompts, so if clients ask whether ChatGPT cites them, that answer costs extra or needs another tool. There is no free plan and no free trial, only a seven-day money-back guarantee. Buy Surfer when writers are the bottleneck and every article needs a score before it ships.

What we like

• Content Editor scores drafts live against the pages already ranking, with word count, headings, structure and related terms
• Discovery covers 120 documents a month, plus keyword research, a topical map and content audits
• Google Docs and WordPress integrations put the score where writers already work

Watch out for

• No AI prompt tracking on the Discovery plan, and no free plan or free trial — only a 7-day money-back guarantee
• Article and audit limits are credits: once the month's 120 documents are used, more work means a higher plan

#2

Clearscope

Best for: In-house content teams that want the cleanest grading report and will pay for accuracy over volume

★★★★★★★★★★4.9/5 on G2 (92 reviews, checked Nov 2026)

Visit clearscope.io

Starting price$129/month (Essentials)

Free planNo free plan — free trial available

Clearscope does one thing: it grades your content with a letter score by comparing it against the pages already ranking, then tells you which terms and subtopics are missing. The Essentials plan costs $129 a month for 20 drafts, 50 tracked queries and 50 pages, with unlimited users and unlimited projects. It is the simplest report in this list to hand a writer.

That simplicity is also the limit. Clearscope writes nothing, tracks no rankings and generates no content — it only grades. Twenty drafts a month is thin for a team publishing daily, and the price is steep for what is essentially one report type. Pick it when grading quality matters more than volume, and pair it with a suite for the rest.

What we like

• Letter-grade reports with keyword and subtopic recommendations drawn from live Google results
• Query tracking across ChatGPT and Gemini plus brand visibility tracking on every plan
• Unlimited users and unlimited projects on Essentials, with Google Docs and WordPress add-ons

Watch out for

• $129/month buys only 20 drafts a month, so high-volume teams hit the cap fast
• No content generation and no rank tracking — it grades drafts, nothing else
• White-label reports, SSO and custom agreements are Enterprise-only

#3

Frase

Best for: Small content teams that want research, briefs, audits and AI visibility in one editor

Visit frase.io

Starting price$39/month (Starter, billed annually)

Free planNo — 7-day free trial (Professional features, no credit card required)

Frase is the most complete small-team editor here: research, briefs, SEO and GEO scores, audits and AI visibility in one place. The Starter plan costs $39 a month on annual billing and covers 10 articles, 50 audit pages and 20 AI visibility prompts across ChatGPT and Google AI. Content Guard watches published pages for decay and proposes the fix, which no other budget tool here does.

Read the pricing page carefully: it loads with annual billing selected, and the monthly rate is not shown, so budget on the annual figure. Ten articles a month is also tight for a team publishing weekly. Buy Frase when you want one editor to run the whole loop from research to fix.

What we like

• SEO and GEO scores in one editor, with AI visibility tracking on ChatGPT and Google AI from Starter
• Content Guard watches pages for rank and traffic decay and proposes the fix
• 7-day free trial runs the full Professional feature set with no credit card required

Watch out for

• The page loads with annual billing selected — $39/month is the annual rate and no monthly rate is shown
• Starter covers only 10 articles and 50 audit pages a month, with a single seat and one domain
• White-label reports and a branded client portal are Enterprise-only

#4

Semrush

Best for: Small teams and agencies that want on-page audits plus keyword research, backlinks and PPC in one subscription

Visit semrush.com

Starting price$139.95/month (SEO plan, billed monthly; $117.33/month billed annually)

Free planYes — free account

Semrush is the deepest bench in this list. The entry SEO plan costs $139.95 a month and pairs the On Page SEO Checker with Site Audit, so one subscription covers both the words on the page and the code behind it. The checker draws on a keyword database Semrush puts at more than 27 billion keywords, and the plan tracks 500 keywords daily down to ZIP-code level.

It is also the priciest way in among the suites, and the AI side costs more: dedicated AI prompt tracking needs the $99-a-month AI Visibility Toolkit, not the SEO plan itself. Buy Semrush when you need the research depth behind the recommendations, not just a score on a page.

What we like

• On Page SEO Checker gives page-level fixes from the same data as the 27-billion-plus keyword database
• Site Audit crawls for technical issues alongside the content recommendations
• 500 keywords tracked daily on the entry SEO plan, with tracking down to ZIP-code level

Watch out for

• Highest entry price among the suites here, and dedicated AI prompt tracking needs the $99/month AI Visibility Toolkit add-on
• Extra users start at $45/month, and white-label reports are paid add-ons
• The free account is limited, so meaningful auditing requires a paid plan

#5

SE Ranking

Best for: Small agencies and in-house teams that want a full SEO suite with AI visibility for about $103/month

Visit seranking.com

Starting price$129/month (Core, billed monthly; $103.20/month billed annually)

Free planNo — 14-day free trial

SE Ranking is the value pick in this list because the entry Core plan does not feel like an entry plan: 2,000 keywords tracked daily, 10 projects, a 250,000-page site audit allowance and AI visibility tracking across five engines at 25 prompts a day. For a small agency or an in-house team, that is the whole SEO workflow in one subscription for $103.20 a month billed annually.

The trade-off is polish. Reviewers like the depth but some report small accuracy differences against the bigger suites, and the interface takes a few days to learn. If you want the cheapest route to daily tracking plus AI visibility in a full suite, start here.

What we like

• AI visibility tracking on 5 engines with 25 prompts a day on the entry Core plan
• Full suite in one plan: site audit, keyword and backlink research, content and local marketing
• 2,000 keywords tracked daily, 10 projects and a 250,000-page site audit allowance

Watch out for

• Some G2 reviewers report occasional minor differences in rank-tracking accuracy and search-volume estimates versus larger competitors
• Reviewers note the interface can feel less intuitive, and complex reports take getting used to
• White-label reporting is a paid add-on rather than part of the entry plan

#6

Ahrefs

Best for: In-house SEOs and agencies already paying for Ahrefs who want audits bundled with backlink and keyword research

Visit ahrefs.com

Starting price$29/month (Starter, billed monthly; no annual billing option)

Free planYes — Ahrefs Free for verified site owners (Site Audit credits included)

Ahrefs is the cheapest paid entry in this list at $29 a month for Starter, and the audit is backed by one of the largest backlink indexes and a 110-billion-keyword database. Site Audit flags the technical issues on each page, and because the crawl data sits next to the keyword and link data, every issue comes with the context of which pages and keywords it affects.

The limits are real: Starter tracks only 50 keywords with weekly updates, and the metered report credits cap how much research you can run each month. For teams already paying for Ahrefs, the audit is an easy yes; as a first on-page tool on its own, the dedicated editors give you more guidance per dollar.

What we like

• Site Audit sits on one of the largest backlink indexes and a 110-billion-keyword database
• Crawl data links each issue to the pages and keywords behind it, so fixes have context
• Tracks positions across 190+ locations on desktop and mobile, with competitor tracking

Watch out for

• Rank Tracker updates weekly by default on every plan — daily updates need the paid Project Boost add-on
• No free trial, and metered report credits on Starter and Lite cap how much research you can do each month
• Site Audit credits are limited on Starter, so large sites hit the cap quickly

#7

Moz Pro

Best for: Small in-house teams that want Domain Authority metrics, keyword research and site audits in one beginner-friendly suite

Visit moz.com

Starting price$49/month (Starter)

Free planNo — 7-day free trial (Standard/Medium monthly plans, credit card required)

Moz Pro is the friendliest suite in this list, and it owns Domain Authority — the 0–100 site-strength score that appears in countless client reports. The Starter plan costs $49 a month and covers keyword research and site audits with those metrics built in, which is a lot of tool for a team that is still learning SEO. No annual price is shown for the entry plan, so budget on the monthly figure.

The honest limitation is rank tracking: Starter has no Rank Checker at all, so tracking starts at Standard for $99 a month and updates weekly there. Buy Moz for the metrics and the learning curve; buy a dedicated tracker if daily positions are the job.

What we like

• Domain Authority, Page Authority and Spam Score — the metrics clients already recognize — built into every plan
• Full suite in one subscription: Keyword Explorer, Link Explorer, site audit and rank tracking, plus MozBar Premium from Standard
• Rated the easiest full SEO suite to learn, with extensive training resources for newer SEOs

Watch out for

• The $49/month Starter plan has no Rank Checker, so rank tracking starts at Standard ($99/month)
• Rank tracking updates weekly on Standard; daily updates need Medium ($179/month)
• Real-time daily tracking lives in STAT, a separate enterprise product

#8

NeuronWriter

Best for: Solo writers and small sites that want Surfer-style content scoring at the lowest price here

Visit neuronwriter.com

Starting price$23/month (Bronze, billed monthly; $230/year billed annually)

Free planNo — 7-day free trial (Gold plan terms)

NeuronWriter is the budget pick in this list: a semantic optimization editor in the Surfer mold — term coverage, SERP analysis and a content score that updates as you write — for $23 a month on Bronze. That covers 2 projects, 25 documents and 15,000 AI credits, plus 5 AI-monitored questions, so even the cheapest plan watches whether AI answers mention you.

The ceiling is low. WordPress, Search Console and Shopify integrations start on Gold at $69 a month, as do plagiarism checks and the API, and Bronze covers only 25 documents. For a solo writer optimizing a handful of pages a month, it is the cheapest real scoring in this list.

What we like

• NLP content scoring against ranking pages, with SERP analysis and a live in-editor grade
• Bronze includes 5 AI-monitored questions, so AI visibility is tracked from the cheapest plan
• 30-day refund on the first plan, and yearly billing costs $230 instead of $276

Watch out for

• Integrations with Google Search Console, WordPress and Shopify start on Gold ($69/month), not Bronze
• Plagiarism checks and the API start on Gold, and Bronze covers only 25 documents a month
• AI-monitored questions are capped at 5 on Bronze, so AI visibility tracking stays light

#9

PageOptimizer Pro

Best for: SEOs who want data-led on-page reports with exact-term recommendations rather than a writing score

Visit pageoptimizer.pro

Starting price$40/month (Basic)

Free planNo — 7-day refund guarantee

PageOptimizer Pro takes a different approach from every other editor here. Instead of giving your draft a content score, it runs a multivariate analysis on the top-ranking pages and tells you exactly which terms to use, how often, and where on the page. The Basic plan costs $40 a month for 20 POP credits, with unlimited domains and the AI Visibility Tracker included.

It is a specialist's tool, and it reads like one: there is no free trial, only a seven-day refund guarantee, so you pay before you try it, and 20 credits a month is thin for an agency. Pick POP when you trust statistics more than writing scores and want precise term-level instructions.

What we like

• POP Rank Engine runs multivariate analysis on the top-ranking pages instead of a simple content score
• Exact-keyword, variation-word and LSI recommendations tell you precisely what to add and where
• AI Visibility Tracker is included on every plan, across ChatGPT, Google AI, Gemini, Claude and Perplexity

Watch out for

• Basic covers only 20 POP credits a month, so heavy users must ration reports or upgrade
• No free trial — a 7-day refund guarantee instead, so you pay before you try it
• White-label PDF reports are Team plans only

#10

Screaming Frog

Best for: Technical SEOs and agencies that need a deep desktop crawl of every page on a site

Visit screamingfrog.co.uk

Starting price£199/year per licence (paid version; free version crawls 500 URLs)

Free planYes — free version (500 URLs per crawl)

Screaming Frog is the crawler technical SEOs learned on: a desktop program that walks your site the way a search engine bot does and reports every broken link, missing title, redirect chain and duplicate page it finds. The free version crawls 500 URLs; the paid licence costs £199 a year per user and lifts the cap, adds JavaScript rendering, custom extraction, scheduling and integrations with Analytics, Search Console and PageSpeed Insights.

There is no monthly billing and no cloud version — it runs on your machine, one licence per user — and the output is raw data, not a plain-language score. For a technical audit of a real site, though, nothing else here crawls as deep for the money.

What we like

• Crawls unlimited URLs on the paid licence, with JavaScript rendering and custom extraction
• Checks titles, meta data, hreflang, structured data, spelling and accessibility across the full crawl
• Integrates with Google Analytics, Search Console and PageSpeed Insights, with scheduled crawls

Watch out for

• Desktop-only software — no cloud version, so crawls run on your own machine
• One licence covers one user, and there is no monthly billing option
• The raw crawl data takes experience to read; there is no plain-language content score

What the best on-page seo analysis tools actually does

The best on-page seo analysis tools tell you what is wrong with a single page and what to change, before you publish or after it stops ranking. Some grade the words — length, headings, related terms, how well the draft covers the topic. Others crawl the code — titles, meta descriptions, headings, structured data, internal links, broken elements. The good ones do one of those jobs well; the suites try to do both, and charge for it.

People search for this category several ways — on-page SEO tools, onpage analyzers, content optimizers, SEO audit tools — and they mostly mean the same thing: a tool that looks at a page and returns a fix list. The products differ in what they measure, and the price follows the measurement, not the brand.

One number that shows the scale of the data behind these tools: Semrush describes its keyword database as holding more than 27 billion keywords. That database is what its On Page SEO Checker draws on, and it is why the suites cost more than the dedicated editors — you are paying for the research index as well as the page check.

The best on-page seo analysis tools for content teams

If your job is publishing — writing, editing, refreshing old posts — the content editors are the tools that matter. Surfer scores drafts live against the pages already ranking, Clearscope grades them with a letter score, Frase runs the whole loop from research to fix, and NeuronWriter does the same job for $23 a month. None of them crawls your site; they all assume the page exists and the words are the problem.

The honest cost math: a solo writer can run NeuronWriter at $23 a month plus Screaming Frog free and cover both words and code for $23. A content team publishing daily spends $59 on Surfer Discovery ($49 billed annually) plus $40 on PageOptimizer Pro for term-level checks — $99 a month for two tools that do genuinely different jobs. The expensive mistake is paying $129 for Clearscope and then discovering you also need a crawler.

The best on-page seo analysis tools for technical audits

If your job is fixing a site — hundreds of pages, broken links, missing titles, bad hreflang — the crawlers are the tools that matter. Screaming Frog walks the whole site and reports every issue it finds, and the suites' site audits do the same inside a bigger subscription. PageOptimizer Pro sits between the two camps: it analyzes the top-ranking pages statistically and tells you exactly which terms to add, rather than grading your draft.

A crawl finds problems no editor can see, which is why our SEO audit service starts with one before any content work. But a crawl cannot tell you whether the words on the page answer the searcher's question — that is the editor's job. Most teams need one of each, and the cheapest honest stack in this list is a free crawler plus a $23 editor.

The best on-page seo analysis tools in all-in-one suites

The suites — Semrush, SE Ranking, Ahrefs and Moz Pro — bundle on-page analysis with keyword research, backlinks and rank tracking. You pay more, but you replace two or three subscriptions. SE Ranking is the value pick at $103.20 a month billed annually, with AI visibility included. Semrush is the deepest at $139.95, Ahrefs the cheapest way in at $29, and Moz the friendliest at $49 with the metrics clients already know.

The right camp depends on what you already pay for: if you own a suite, use its audit and checker before buying a dedicated editor. If you only need pages scored, a dedicated editor costs less. And if AI answers matter to your clients, check the AI line before you buy — dedicated prompt tracking is an add-on for Semrush and Surfer, included for SE Ranking, Frase, Clearscope, NeuronWriter and PageOptimizer Pro, and absent from Screaming Frog entirely.

Quick comparison: tool type by need — best on-page seo analysis tools

How to choose the best on-page seo analysis tools

1. Decide what you are fixing. Words and structure mean an editor — Surfer, Clearscope, Frase or NeuronWriter. Code and crawl issues mean a crawler — Screaming Frog or a suite audit. If you are fixing both, budget for one of each.
2. Count your monthly volume first. Editors charge per article, draft, report or credit. Ten articles a month fits Frase Starter; a hundred needs Surfer Scale or Clearscope Business. Count before you compare prices.
3. Check the billing behind the headline. Frase shows $39 a month only on annual billing, and Moz shows no annual price at all for Starter. The annual price is usually 15–20% lower, and a few tools have no annual option.
4. Check the AI question. If clients ask about ChatGPT and AI Overviews, make sure the plan you pick includes AI visibility — several tools charge extra for it, and Screaming Frog does not track it at all.
5. Try before you pay. Every tool in this list has a free plan, a free trial or a money-back guarantee. Run your real pages through it for a week and compare the fix list against how to track your Google ranking so you know what the tool should be showing.

Before you publish new pages for the keywords you optimize, run your titles through the free SERP snippet preview tool — it shows exactly how the title and description will look in Google.

Mistakes to avoid with the best on-page seo analysis tools

• Chasing a perfect score. A content score measures similarity to ranking pages, not quality. A 100 that reads badly still loses to a clear, useful 80.
• Comparing monthly prices without checking billing. The annual price is usually 15–20% lower, and Frase does not show a monthly rate at all — budget on the annual figure.
• Ignoring what counts as a unit. Articles, drafts, reports, credits and crawled URLs are all different meters. Tracking one keyword in five cities can cost five units in some tools.
• Paying for a suite when you only need pages scored. A dedicated editor at $23–$49/month beats a $129 suite you only use for content scores.
• Trusting a directory price. Clearscope still shows $189 on several directories; the live pricing page says $129. Surfer's old Essential plan at $99 is gone too. Always check the vendor's own page.

How we chose the best on-page seo analysis tools

We opened each vendor's own pricing page on November 1, 2026 — Surfer, Clearscope, Frase, NeuronWriter, PageOptimizer Pro and Screaming Frog — and recorded the starting price exactly as shown, including the annual-billing figure where the page lists one. Semrush, Ahrefs, SE Ranking and Moz Pro prices were re-confirmed from live pricing-page checks made on October 31, 2026. Frase's $39 is an annual-billing rate only, since its page shows no monthly rate; Surfer's $59 is the monthly-billed Discovery rate ($49 billed annually), and Screaming Frog is priced in pounds, not dollars. Ratings are shown only where we opened the review page today: Clearscope on G2 at 4.9/5 from 92 reviews. Other G2 pages rate-limited (429) on the day, so those ratings were omitted rather than estimated. We ranked the tools by fit for the most common buyer — a small content or SEO team fixing real pages — not by brand size. No vendor paid for a place in this list, and none of the links here are affiliate links.

What to do next with the best on-page seo analysis tools

Start with the decision path above: decide whether you are fixing words or code, count your monthly volume, and check the billing behind the headline. Then take the free plan or trial of your top pick and run your real pages through it for a week. If the fix list is specific enough to act on and the reports make sense to a client, you have your tool. If you'd rather have this set up and read for you, request a free SEO + AI visibility audit and get a ranked fix list in 2 business days.

Sources we checked (11)

• Surfer pricing — surferseo.com/pricing (checked November 1, 2026)
• Clearscope pricing — clearscope.io/pricing (checked November 1, 2026)
• Clearscope on G2 — 4.9/5, 92 reviews (checked November 1, 2026)
• Frase pricing — frase.io/pricing (checked November 1, 2026)
• Semrush pricing — semrush.com/prices (checked October 31, 2026)
• SE Ranking pricing — seranking.com/subscription.html (checked October 31, 2026)
• Ahrefs pricing — ahrefs.com/pricing (checked October 31, 2026)
• Moz Pro pricing — moz.com/products/pro/pricing (checked October 31, 2026)
• NeuronWriter pricing — neuronwriter.com/pricing (checked November 1, 2026)
• PageOptimizer Pro pricing — pageoptimizer.pro/pricing (checked November 1, 2026)
• Screaming Frog pricing — screamingfrog.co.uk/seo-spider/pricing (checked November 1, 2026)