WordPressに最適なSEOツール (2026): 12 無料と有料のピックの比較 - JA

Ahrefs はエントリー価格を次のように値下げしました 70% 1月に 2026, 月額 29 米ドルでスターター プランを開始. 良いニュースです, しかしそれはリードを埋める. ほとんどの WordPress サイトがランク付けするために必要な 3 つのツールは依然として費用がかかりません. The real skill is knowing which paid tools earn their renewal fee and which just repackage data Google already hands you for free.

簡単な回答: 無料で始める. Run Rank Math (自由) for on-page SEO, then connect Google Search Console and Ahrefs Webmaster Tools (also free) for indexing and backlink data. That covers most of what a small WordPress site needs. Pay only when you hit a wall. WPロケット (59ドル/年) fixes speed. SEOPress PRO or Rank Math PRO add advanced on-page control. Ahrefs or SEMrush earn their place once keyword research becomes a daily job.

最終レビュー済み: 六月 2026. Prices and plan names verified on official pages.

How We Picked These Tools

We started with the nine tools the previous version of this guide listed, then kept every one that’s still actively developed. We added three more to fill obvious gaps: internal linking, technical crawling, and content optimization. To make the cut, a plugin needed real adoption (250,000+ アクティブインストール) or a function no rival here covers. Nothing got dropped for being “not the best.” We verify and rank, we don’t cull.

Pricing came from each tool’s official page in June 2026, cross-checked against WordPress.org install counts and aggregated user reviews. 4つのことに重みを付けました. 初め, how native the tool is to WordPress: a plugin beats a web app with an integration, which beats a desktop crawler. 2番, how usable the free tier actually is. 三番, whether renewal pricing is honest. 第4, which SEO job it owns, so the list carries no redundant picks.

What we didn’t do: 合成負荷テストを実行する, measure each plugin’s effect on page weight, or test every AI feature on live sites. Some annual figures are calculated from monthly rates. Where a renewal price wasn’t published, we say so in the section. A good host matters too, since no plugin rescues a slow server. That starts with picking SEO-friendly web hosting before you install anything.

A quick map before the details. ヨースト, アイオセオ, ランク数学, and SEOPress are four on-page plugins fighting for the same slot. Pick one and never run two at once; they clash over titles and schema. Ahrefs and SEMrush are research suites for keywords and backlinks. Google Search Console and Keyword Planner are free Google tools every site should use. WPロケット, Link Whisper, Screaming Frog, and Surfer each own one job: 速度, internal linking, technical crawling, コンテンツ.

Ahrefs – Best for Backlink Analysis and Keyword Depth

無料利用枠: Ahrefs Webmaster Tools (sites you own). から支払われました 29ドル/月 (スターター), up to USD 449/month (高度).

1月 2026 Starter plan changed the math for small WordPress sites. For USD 29/month you get one project, 100 tracked keywords, と 5,000 crawl credits, enough to watch a handful of pages and run light keyword research. That undercuts SEMrush’s cheapest paid tier (USD 139.95/month) およそまでに 79%. The ceiling shows up fast. Starter is monthly-only, and serious work pushes you to Lite at USD 129/month. That tier gives you 5 プロジェクト, 750 tracked keywords, と 100,000 crawl credits.

Here’s the part most guides miss. Ahrefs retired its free WordPress plugin on October 31, 2025. WordPress owners now verify their site inside Ahrefs Webmaster Tools instead. それは無料です, and includes a Site Audit covering 170+ issues plus a look at up to 1,000 backlinks at a time. For many site owners, that free tier answers “who links to me and what’s broken” without paying a cent.

長所

• Largest backlink index of any tool here, by reputation and user reviews
• Free Webmaster Tools gives real audit and backlink data for owned sites
• 新しい 米ドル 29 Starter tier finally fits hobby budgets

短所

• Steep jump from Lite (米ドル 129) to Standard (米ドル 249)
• No free trial since 2022, and one user seat per plan

価格設定: Starter USD 29/month (monthly only). Lite USD 129/month (約米ドル 108 年払い). Standard USD 249/month. Advanced USD 449/month. Enterprise runs USD 1,499/month on annual terms.

こんな方に最適: link-building and keyword research across one or more sites. 次の場合はスキップします: you only need on-page checks for a single blog.

評決: Buy Ahrefs if backlinks and keyword depth drive your work, and test it at Starter first. If you just need rank tracking and on-page fixes for one WordPress site, しないでください. Rank Math PRO plus the free Webmaster Tools covers that for a fraction of Lite’s USD 129/month.

Yoast SEO – Best for One Polished, Well-Documented Site

Free version: はい, and capable. プレミアム: USD 118.80/year 1つのサイトに対して.

Start with the price model, because it shapes everything. Yoast Premium covers a single domain. Run three sites and you buy three subscriptions. That makes Yoast the most expensive option here per site: USD 118.80/year for one site, where Rank Math PRO covers unlimited personal sites for USD 95.88. You pay more for one Yoast license than for unlimited Rank Math.

So why do 10 million-plus sites run it, で 4.8/5 rating on WordPress.org? Polish and documentation. The free version handles titles, meta, readability analysis, XMLサイトマップ, schema, and IndexNow cleanly. Premium adds the redirect manager, internal linking suggestions, and multi-keyword optimization (up to five keyphrases per page). Yoast also moved early on AI search. Its new bot blocker can wall off GPTBot, CCBot, and Google-Extended. It also manages an LLMs.txt file, which matters as answer engines crawl for citations.

長所

• Best documentation and onboarding of any plugin here
• Deep, reliable Schema.org output out of the box
• Strong AI-crawler controls (bot blocker, LLMs.txt)

短所

• One site per Premium license, no unlimited tier
• Free version paywalls redirects and internal links

価格設定: free tier covers the basics. Premium USD 118.80/year per site (付加価値税抜き). ローカル, ビデオ, and News add-ons are sold separately.

こんな方に最適: one important site where polish and support beat price. 次の場合はスキップします: you run several sites or watch the budget.

評決: Choose Yoast if you manage one flagship site and want the most refined, best-supported plugin with deep schema. 複数のサイトを運営している場合, しないでください. Rank Math PRO handles unlimited personal sites for less than Yoast charges for a single license.

All in One SEO – Best for Guided On-Page Setup

Free version: AIOSEO Lite. から支払われました USD 49.50/year (基本, 1年目). 3M+ active installs, 4.7/5 WordPress.org で.

Where SEOPress renews flat and Rank Math renews near its intro rate, AIOSEO renews at full price, which roughly doubles year two. The Basic plan looks friendly at USD 49.50 1つのサイトに対して, but that’s a first-year discount; SEOPress PRO is the same USD 49 and stays there forever. Read the renewal line before you commit, because the entry number is the friendliest you’ll ever see.

Set the renewal aside: the product itself is genuinely beginner-friendly. The setup wizard walks new users through schema, サイトマップ, and Search Console in minutes, and TruSEO scores content against unlimited target keywords even on the free tier. Paid plans climb by site count and AI credits. プラス (USD 99.50/year, 3 サイト) adds Local SEO. プロ (米ドル 199.50, 10 サイト) unlocks Link Assistant for automated internal linking. エリート (米ドル 299.50, 100 サイト) adds keyword rank tracking and content-decay alerts. 比較用, AIOSEO Plus covers 3 sites where SEOPress PRO covers unlimited for USD 149.

長所

• Smoothest setup wizard for first-time users
• Link Assistant surfaces real internal-link opportunities
• Unlimited target keywords in TruSEO, 無料でも

短所

• Renewal jumps to full price, about double year one
• Features gated by both site count and AI credits

価格設定: Basic USD 49.50/year (1 サイト), プラス米ドル 99.50 (3 サイト), プロUSD 199.50 (10 サイト), Elite USD 299.50 (100 サイト). All renew at full list price. 14-日返金保証.

こんな方に最適: beginners who want hand-holding and will stay on one site. 次の場合はスキップします: you manage several sites or hate renewal surprises.

評決: Pick AIOSEO if its wizard and Link Assistant fit how you work and you’ll stay at the Basic tier. If you run multiple sites or want predictable billing, SEOPress PRO does the same job at a flat USD 149 無制限のサイト向け. Meanwhile AIOSEO Elite renews past USD 299.

Rank Math – Best for Most Features on a Free Budget

Free version: ここで最も寛大な. プロ: USD 95.88/year 1年目, 更新日 米ドル 107.88, unlimited personal sites. 4M+ active installs, 4.8/5 WordPress.org で.

無料, and not crippled-free. Rank Math’s free tier ships Search Console and Analytics integration, a redirection manager, a 404 monitor, 16+ schema types, automatic image SEO, and one-click import from Yoast or AIOSEO. Most plugins paywall half of that. 結果: a brand-new blog can run real SEO at zero cost, then upgrade only if it needs the extras.

PRO is where the value sharpens. 米ドル 95.88 最初の年 (米ドル 107.88 更新について) covers unlimited personal sites and bundles a 500-keyword rank tracker, Content AI, and AI Link Genius for automated internal linking. Pulling a 500-keyword tracker out of Ahrefs instead would cost USD 129/month at Lite. The trade-off is the upsell: Content AI runs on metered credits, and a cluster of reviews flag surprise charges for an auto-renewing “Content AI Starter” アドオン. Watch what you enable.

長所

• Free tier beats most paid plugins on features
• Unlimited personal sites on the PRO license
• Built-in 500-keyword rank tracker and link automation

短所

• Content AI is metered, with auto-charge complaints
• Settings screen can feel busy at first

価格設定: free tier is fully usable. PRO USD 95.88/year (米ドルを更新します 107.88). ビジネス米ドル 299.88 (100 クライアントサイト). Agency USD 659.88 (500 クライアントサイト).

こんな方に最適: hobbyists and small agencies wanting maximum features per dollar. 次の場合はスキップします: metered AI billing makes you nervous.

評決: Install Rank Math if you want the deepest free tier and unlimited-site PRO pricing, which suits everyone from a first blog to a small agency. If past metered-AI charges burned you, SEOPress PRO’s flat billing is calmer. If you want the gentlest learning curve and the best docs, Yoast wins.

SEMrush – Best for Content and Competitor Research

Free account: 約 10 searches a day. から支払われました USD 139.95/month (プロ).

SEMrush is less a WordPress plugin and more a marketing command center you point at WordPress. プロ (USD 139.95/month, またはおおよそ米ドル 117 年払い) gives keyword research, a site audit, position tracking for around 500 キーワード, and backlink analytics. The reason to pay is breadth: topic research, content templates, PPC data, and competitor gap analysis that pure SEO plugins never touch.

2つのことがそれを妨げています: access and price steps. The free account caps you near 10 searches per day, which is too thin for real work, while Ahrefs Webmaster Tools gives free audits and 5,000 crawl credits monthly. And the tiers leap hard: Pro to Guru adds USD 110/month (米ドル 249.95), Guru to Business another USD 250 (米ドル 499.95). For a couple of WordPress sites, that’s a lot of tool to buy. Against the entry point, SEMrush Pro (米ドル 139.95) sits about USD 11 above Ahrefs Lite (米ドル 129), but Ahrefs now starts at USD 29.

長所

• Widest feature set: コンテンツ, PPC, and competitor tools
• Strong position tracking and site audit on Pro
• 7-day trial to test before paying

短所

• Free account capped near 10 searches/day
• Large price jumps between Pro, 達人, とビジネス

価格設定: Pro USD 139.95/month, Guru USD 249.95, ビジネス米ドル 499.95. Annual billing trims roughly 16%. Free trial is 7 days via the official site.

こんな方に最適: marketers doing content and competitor research beyond WordPress. 次の場合はスキップします: you mainly need keywords and backlinks for a few sites.

評決: Go SEMrush if content marketing and competitor analysis are core to your job and you’ll use the wider toolkit. If you mostly need backlinks and keywords for WordPress, Ahrefs gives more usable free access and a USD 29 Starter tier against SEMrush’s USD 139.95 床.

Google Search Console – Best for Indexing and Real Query Data

価格: 自由, 永遠に. Built and run by Google.

The most important tool on this list costs nothing. Search Console is the only place you see the actual search queries bringing people to your WordPress site, straight from Google’s index. It reports impressions, クリック数, average position, and which pages are indexed or excluded and why. Its URL Inspection tool tells you whether a specific page is live in the index, and you can request a recrawl after edits.

For WordPress owners, two reports earn daily use. The performance report shows which keywords you already rank for (your fastest wins are usually pages sitting at positions 5 に 15). The Core Web Vitals report shows real-user LCP, インド, and CLS scores, the field data Google actually grades you on. SEMrush’s free account stops near 10 searches a day, and its Pro tier runs USD 139.95/month. Search Console hands you unlimited, exact query data for your own site at USD 0. Every SEO plugin here, Yoast and Rank Math included, submits its sitemap straight to it.

長所

• Only source of your real Google query data
• Field コアWebバイタル Google grades you on
• Free index diagnostics and recrawl requests

短所

• Shows only your data, no competitor view
• Performance history capped at 16 月

価格設定: 自由. Requires a Google account and a one-time site verification.

こんな方に最適: every WordPress site, 例外はありません. 次の場合はスキップします: 一度もない. There’s no reason not to connect it.

評決: Connect Search Console on day one; no site owner should skip it. The one thing it won’t do is competitor or keyword-volume research, which is where Google Keyword Planner or Ahrefs come in next.

Google Keyword Planner – Best for Free Keyword Ideas

価格: 自由, with a Google Ads account required.

One limitation upfront, because it decides whether this tool fits you. Without an active ad campaign, Keyword Planner shows search volume as broad ranges, お気に入り 1,000 に 10,000, not exact numbers. It was built for advertisers, so the data leans toward ad planning, and it groups closely related keywords together. You also need a Google Ads account to open it, even if you never spend.

Within those limits, it’s useful and free. For seeding ideas before you write, Keyword Planner surfaces real terms people search and their rough scale, which is plenty for a new WordPress blog choosing topics. Put plainly: where Ahrefs Starter (29ドル/月) gives exact volumes and difficulty scores, Keyword Planner gives you ranges at zero cost. Many site owners start here, then graduate to a paid tool once guessing between “1K to 10K” stops being good enough.

長所

• Free keyword discovery straight from Google
• Good for early topic ideas on a new site
• Pairs naturally with Search Console data

短所

• Volumes show as 範囲, not exact numbers
• Requires a Google Ads account to access

価格設定: 自由. A Google Ads account is required; an active campaign unlocks precise volumes.

こんな方に最適: 自由, directional keyword ideas on a budget. 次の場合はスキップします: you need exact volumes to prioritize a content calendar.

評決: Use Keyword Planner if you want free keyword ideas and already touch Google Ads. If you need exact volumes and difficulty to plan content seriously, it won’t cut it, and Ahrefs Starter at USD 29/month or SEMrush will.

SEOPress – Best for Agencies and Flat Renewal Pricing

Free version: 寛大, with no admin upsells. プロ: USD 49/year (1 サイト) また USD 149/year (無制限), フラットを更新します. 300,000+ インストールします, 4.8/5 WordPress.org で.

米ドル 49 1年, and it stays USD 49. SEOPress is the only plugin here that promises flat renewal for life, locked even if the list price rises later. For one site that’s USD 49, and for unlimited sites it’s USD 149, against AIOSEO Elite at USD 299.50 (より高く更新する) 為に 100 サイト. For an agency counting licenses across many clients, that gap compounds fast.

価格を超えて, the plugin earns its place. The free tier carries a universal SEO metabox that works in Gutenberg, Elementor, ディビ, and Bricks, content analysis with unlimited keywords, and white-label branding by default, which agencies love. It also leans into AI search early: a native LLMs.txt file and a one-click “Agent Readiness” toggle aimed at ChatGPT, Claude, and Perplexity. PRO adds multi-provider AI metadata (OpenAI, Gemini, Claude), a full redirect manager, and a schema editor. The drawback: the ecosystem is smaller, and rank tracking lives in a separate USD 99/year Insights product rather than bundled in.

長所

• 一律の更新価格, 一生閉じ込められる
• White-label by default, ideal for client work
• Early AEO features (LLMs.txt, Agent Readiness)

短所

• Smallest plugin ecosystem of the four
• Rank tracking costs an extra USD 99/year

価格設定: PRO USD 49/year (1 サイト) or USD 149/year (無制限), フラットリニューアル. Insights rank tracker USD 99/year. Bundle USD 128/year.

こんな方に最適: agencies and multi-site owners who hate renewal creep. 次の場合はスキップします: you want the biggest ecosystem and the most tutorials.

評決: Choose SEOPress if you run several sites, build for clients, or refuse renewal markups. If you want the largest community and the most how-to content, Yoast or Rank Math have more. For agencies tallying renewals, SEOPress is the cheapest honest license here.

WP Rocket – Best for Core Web Vitals and Speed

No free version. 計画から 59ドル/年 (独身) to USD 299/year (マルチ).

If your Core Web Vitals are red and you’re on shared hosting, this is usually the fastest fix. WP Rocket is a caching and performance plugin, not an SEO plugin, but speed is a ranking factor, so it belongs in any serious WordPress SEO stack. It handles page caching, 遅延読み込み, preloading, データベースのクリーンアップ, and the two that move INP most: delaying and deferring JavaScript. Turn it on, and most sites see greener field scores within a crawl cycle or two.

Simplicity is the pitch. Free caching plugins exist, but they demand manual tuning; WP Rocket ships sensible defaults that work on install. At USD 59/year for one site, it costs less than a single month of Ahrefs Lite (米ドル 129). 一つのギャップ: it doesn’t optimize images, so heavy photo sites also need the same vendor’s Imagify. And page speed starts at the server, not the plugin, so pair it with a fast host. 私たちの ホスティング速度の計算式 breaks down what actually moves load times.

長所

• Works on install, almost no configuration
• Delay and defer JS directly help INP scores
• Cheapest speed win in the stack at USD 59

短所

• No free tier to test first
• No built-in image optimization (needs Imagify)

価格設定: Single USD 59/year (1 サイト), Plus USD 119/year (3 サイト), Multi USD 299/year (50 サイト). 14-当日返金. Renews at list price.

こんな方に最適: slow sites on shared or basic hosting. 次の場合はスキップします: your managed host already includes server-level caching.

評決: Buy WP Rocket if pages load slowly and you’d rather not hand-tune caching; it’s the quickest route to greener Core Web Vitals. If you’re on managed WordPress hosting with built-in caching, you may not need it. On a zero budget, free caching plugins work, just plan for more setup time.

Link Whisper – Best for Automated Internal Linking

無料枠なし. 計画から USD 97/year (スターター, 1 サイト).

None of the plugins above automate internal linking well, and Link Whisper does almost nothing else. As you write, it reads your draft and suggests contextual internal links from your existing posts, then lets you add them in bulk. It also flags orphaned posts, the pages with no internal links pointing in, which crawlers struggle to find. Internal links spread ranking signals and help Google understand your site structure, and most WordPress owners do this badly or not at all.

So do you need a dedicated tool for it? Link Whisper Starter is USD 97/year for one site, 米ドルに上昇 497 為に 50 サイト. But Rank Math PRO bundles AI Link Genius (automated internal linking) inside its USD 95.88 unlimited-site license, which also covers on-page SEO. If you already pay for Rank Math PRO, you’re close to this feature already. Link Whisper earns its keep when you publish heavily and want the deepest, most automated linking workflow, 終点.

長所

• Best automated internal-linking workflow here
• Orphaned-post reports you won’t get elsewhere
• Runs natively inside the WordPress editor

短所

• Does one job only, no keyword or audit data
• No free version, と 年間請求のみ

価格設定: Starter USD 97/year (1 サイト), Growth USD 197 (3 サイト), プロUSD 297 (10 サイト), Agency USD 497 (50 サイト).

こんな方に最適: high-volume publishers where internal linking is a real bottleneck. 次の場合はスキップします: you already run Rank Math PRO.

評決: Get Link Whisper if internal linking genuinely slows you down and you publish often enough to justify USD 97/year. If you already pay for Rank Math PRO, its AI Link Genius covers much of this inside a plugin you own, so try that first.

Screaming Frog SEO Spider – Best for Deep Technical Audits

Free up to 500 URL. Paid license GBP 259/year (約米ドル 225).

It’s not a plugin, and it’s not pretty. Screaming Frog is a desktop app you point at your site, and it crawls every page the way a search engine would. It finds broken links, redirect chains, duplicate or missing meta titles and descriptions, 薄い内容, and indexability problems no on-page plugin catches site-wide. For a technical audit, nothing else here comes close.

The free version caps at 500 URLs per crawl, which covers most small WordPress blogs completely. それを過ぎて, the license is GBP 259/year (およそ米ドル 225) and unlocks unlimited crawling, saved crawls, and integrations with Search Console and PageSpeed Insights. Compared with Ahrefs Lite at USD 129/month, a full year of Screaming Frog costs less than two months of Ahrefs. The caveat for a WordPress audience: it’s a learning curve, and a desktop tool rather than something living in wp-admin. Search Console reports some of the same index issues for free, just without the on-demand, whole-site crawl.

長所

• Deepest technical crawl of any tool here
• Free up to 500 URL, enough for small sites
• One-time annual license, no monthly drain

短所

• Desktop app, not a WordPress plugin
• Steeper learning curve than the plugins

価格設定: free to 500 URL. Paid license GBP 259/year (約米ドル 225), one user.

こんな方に最適: consultants and agencies auditing sites at scale. 次の場合はスキップします: you run one small blog and just want index status.

評決: Use Screaming Frog if you run technical audits, especially across clients, and don’t mind a desktop tool. If you have one small WordPress site and only want index status, Google Search Console reports much of the same for free. The paid license is for people who crawl for a living.

Surfer SEO – Best for Content Optimization

無料枠なし. Essential plan 99ドル/月 (USD 79/month billed annually).

USD 99/month buys what no plugin here offers: a live score of your draft against the pages already ranking. Surfer’s Content Editor analyzes the current top results for your keyword, then grades your draft on terms, 構造, and length as you write, with a target score to hit. It connects to WordPress, Google Docs, and ChatGPT, so writers work where they like. The Essential plan covers 30 optimized articles a month, and a finished draft pushes to WordPress in two clicks, images included.

Cost is the obstacle. Essential is USD 99/month, or USD 79/month on annual billing, およそ米ドル 948 1年. That’s about 6x the cost of SEOPress PRO unlimited (USD 149/year) for content scoring alone, and it overlaps with content tools already in Ahrefs and SEMrush. Surfer earns it only if publishing is your growth engine and you’ll use it weekly. If you write occasionally, Rank Math’s Content AI or a careful read of the live results gets a hobby site most of the way for far less. Pairing it with an AI WordPress ビルダー can speed up drafting, but the SERP analysis is the part you’re really paying for.

長所

• Live content score against real ranking pages
• Clean WordPress and Google Docs integration
• Speeds up writing briefs and outlines

短所

• By far the priciest tool here, about USD 948/year
• A web app, not a true WordPress plugin

価格設定: Essential USD 99/month, または、月額 79 米ドルが毎年請求されます. Higher tiers add pages tracked and team features.

こんな方に最適: content teams publishing weekly who live by organic traffic. 次の場合はスキップします: you publish occasionally or watch costs.

評決: Pay for Surfer if content production is your main growth lever and you’ll use it every week. If you publish now and then, or you’re cost-sensitive, スキップしてください. Rank Math’s Content AI or a close look at the SERP covers a smaller site for a fraction of USD 948/year.

How to Choose the Right SEO Tools for Your WordPress Site

Don’t buy a stack. Buy the one tool that solves your current bottleneck, then add the next when you hit a real wall. Here’s how that plays out by scenario.

Budget USD 0, new blog: 下 50 posts and nothing to spend? Run Rank Math (自由) for on-page SEO, plus Google Search Console and Ahrefs Webmaster Tools for indexing and backlinks. Skip every paid plugin; you won’t touch a redirect manager or rank tracker yet. This trio covers more than most beginners realize, and it costs nothing.

Growing content site: 100+ posts and doing real keyword research? Rank Math PRO (米ドル 95.88, 無制限のサイト) for on-page control, plus Ahrefs Starter (29ドル/月) when you outgrow free keyword data. Skip SEMrush here. 米ドルです 139.95 entry buys breadth you won’t use yet, while Ahrefs starts five times cheaper.

エージェンシー, 20 クライアントサイト: SEOPress PRO unlimited (USD 149/year, フラットリニューアル) beats AIOSEO Elite (米ドル 299.50, より高く更新される) on per-site cost and white-labels by default. Add Screaming Frog (GBP 259/year) for technical audits across the whole roster. That pairing covers on-page and technical for every client under USD 400 1年.

WooCommerce, failing Core Web Vitals: Slow checkout dragging conversions? WPロケット (59ドル/年) 最初, then Rank Math’s WooCommerce SEO for product pages. Don’t buy Surfer; product listings need speed and schema, not a content score. A fast store also leans on the host, so read up on WordPress eコマースホスティング before blaming the plugins.

One rule cuts through all of it: free tools first, paid tools only against a named problem. If you can’t name the wall a paid tool removes, you don’t need it yet.

よくある質問

Is Rank Math better than Yoast SEO for WordPress?

For most users in 2026, Rank Math gives more for less. Its free tier includes a redirect manager, schema, and rank tracking that Yoast paywalls. And Rank Math PRO covers unlimited personal sites for USD 95.88, against Yoast Premium’s USD 118.80 per single site. Yoast still wins on documentation, サポート, and beginner polish. If you value hand-holding over features, pick Yoast; if you want the most capability per dollar, pick Rank Math.

Do I need a paid SEO plugin, or is the free version enough?

For a new or small WordPress site, the free version is usually enough. Rank Math free and SEOPress free both cover titles, meta, schema, サイトマップ, and Search Console integration at no cost. You only need PRO once you want automated internal linking, a built-in rank tracker, or a full redirect manager. The real signal to upgrade is hitting a feature you actually miss, not a vague sense that paid must be better.

How much do WordPress SEO tools cost per year?

You can run solid SEO for USD 0 using Rank Math free, Google検索コンソール, and Ahrefs Webmaster Tools. A typical paid stack for a serious site runs USD 150 米ドルへ 250 1年. That’s an on-page plugin like SEOPress PRO (米ドル 149 無制限) plus WP Rocket (米ドル 59). Research suites are the expensive part. Ahrefs now starts at USD 29/month, while SEMrush begins at USD 139.95/month, so add those only when keyword work becomes constant.

Can I rank on WordPress without Ahrefs or SEMrush?

はい, especially for local or low-competition niches. Google Search Console shows the keywords you already rank for. Google Keyword Planner suggests new ones for free. A free SEO plugin handles the on-page work. Ahrefs and SEMrush mainly add competitor analysis and exact keyword volumes, which matter most in crowded niches. Plenty of small sites rank well on the free stack alone before ever paying for a research tool.

Which SEO tools help with Google AI Overviews and AI search?

The plugins are starting to address this directly. SEOPress ships a native LLMs.txt file and an “Agent Readiness” toggle aimed at ChatGPT, Claude, and Perplexity. Yoast added a bot blocker and LLMs.txt management to control which AI crawlers reach your content. Strong structured data (schema) also helps answer engines parse your pages, and Rank Math, ヨースト, and AIOSEO all generate it. None guarantees an AI Overview citation, but clean schema plus clear, well-linked content remains the best foundation.

最終評決

Start with the free three. ランク数学 for on-page SEO, Google検索コンソール for real query and index data, と Ahrefs Webmaster Tools for backlinks and audits. That stack carries most WordPress sites further than their owners expect, at zero cost.

When you do pay, match the tool to the wall you’ve hit. WPロケット (59ドル/年) 速度のため. SEOPress for flat-renewal control across multiple sites. Rank Math PRO for unlimited personal sites with built-in linking. と Ahrefs (now from USD 29/month) once keyword research turns into a daily habit. Agencies should lean on SEOPress plus Screaming Frog; heavy publishers add Link Whisper or Surfer only when content volume justifies it. スキップ SEMラッシュ unless its competitor and content tools are central to your work.

Tools are only half the job. The other half is the foundation they run on, since speed and uptime shape rankings before a single plugin loads. If you’re still choosing where your site lives, compare your options in our guide to hosting for a WordPress website, then revisit this stack once the server is sorted. Get the host right, run the free three, and add paid tools one named problem at a time.