⚡ Quick Verdict:
- 価格: Ahrefs starts at $108/mo vs SpyFu at $29/mo
- 最適な用途: Ahrefs for backlink analysis and technical SEO, SpyFu for PPC research and competitor keyword spying
- 主な違い： Ahrefs has a much larger backlink database and hourly updates, while SpyFu offers 19+ years of historical ad data and unlimited searches
- Our pick: Ahrefs for most SEO professionals — its backlink index and keyword data are deeper across the board
Ahrefs and SpyFu both promise to give you a competitive edge in search.
But they focus on very different parts of the SEO puzzle.
Ahrefs is built around backlink data and organic keyword research.
SpyFu specializes in competitor spying and paid search intelligence.
Picking the wrong one could mean paying more for features you don’t need.
概要
This Ahrefs vs SpyFu comparison covers pricing, features, and ease of use for both tools.
We also break down who each SEO tool works best for.
Our sources include published specs, official documentation, and G2 reviews.
Our writers also spent hands-on time with each one.
By the end, you’ll know which tool fits your SEO strategy.
Ahrefsとは何ですか？
Ahrefs is an all-in-one search engine optimization platform.
It helps SEO professionals conduct keyword research, manage backlink data, and grow organic search traffic.
The Ahrefs Site Explorer tool, Ahrefs Keywords Explorer, and site audit are its key features.
You can also use the Ahrefs SEO Toolbar to check on-page SEO and SEO metrics while browsing.
Most users choose it for SEO research, keyword suggestions, and finding relevant keywords for their content.
アーレフス
Ahrefs crawls the web constantly to build one of the largest backlink indexes available. It also provides keyword difficulty scores, content gap analysis, and full site audits.
Ahrefsの価格
Ahrefs does not offer a free plan or free trial. Here’s what each plan costs.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| ライト | 月額108ドル | フリーランサー 小規模なウェブサイト |
| 標準 | 月額208ドル | Growing businesses and in-house SEO |
| 高度な | 月額374ドル | Agencies and larger SEO teams |
Pricing verified April 2026.
無料トライアル: No. Ahrefs does not offer a free trial at this time.
返金保証: No refunds are available after purchase.
📌 注記： Ahrefs uses a credit-based system on lower-tier plans. The Lite plan allows 500 reports per month, and heavy usage may require add-on purchases.
⚠️ 警告： Ahrefs pricing increased in April 2024 across all plans. There is no free trial, so you commit to a paid plan from day one. Check current pricing on their website before purchasing.
Ahrefsの主なメリット
Here’s what makes Ahrefs worth considering:
- 大規模バックリンクデータベース： Ahrefs maintains one of the largest backlink indexes on the web. This makes backlink analysis and link building research more thorough.
- キーワードエクスプローラー: Generate new keyword ideas with search volume, keyword difficulty score, and traffic potential data. The keyword tools cover multiple search engines beyond Google. You can find related keywords and see how much traffic each particular keyword drives.
- サイト監査: Crawl your own website for broken links, missing meta descriptions, and other on-page SEO issues. Get a health score with actionable SEO tips and fixes for your site links.
- コンテンツエクスプローラー: Find top ranking pages in any niche. Filter by organic traffic, referring domains, and social shares to discover link building opportunities. Ahrefs content data helps you find valuable keywords to target.
- ドメインレーティング（DR）： Quickly assess any website’s backlink strength with a 0-100 score. Useful for evaluating competitors and potential link partners.
- ランクトラッカー: Monitor your keyword rankings over time and track SEO performance. Compare against competitor positions and see how target keywords move across locations.
- Google Search Console の統合: Connect your Search Console account to see all your keyword data alongside Ahrefs metrics in one dashboard.
What Our Team Noticed
私たちの 作家 signed up for Ahrefs and spent several days exploring the platform. Here’s what stood out from that hands-on time:
Ahrefsのメリットとデメリット
✅ メリット
- Largest backlink database with trillions of links indexed
- Hourly data updates keep SEO metrics current
- Shallow learning curve despite deep feature set
- Site audit catches broken links and on-page SEO issues fast
- Brand Radarは、AIが生成した回答における可視性を追跡します。
❌ デメリット
- No free trial makes committing a risk for new users
- Credit-based system on lower plans can add unexpected costs
- Starting price of $108/month is high for beginners
- トラフィックの推定値は、Google Analyticsのデータと異なる場合があります。
SpyFuとは何ですか?
SpyFu is a competitive intelligence tool for SEO and PPC research.
It helps marketers uncover actionable insights by revealing competitors’ PPC campaigns and organic keyword strategies.
SpyFu’s keyword research tool stores 19+ years of historical data on ad campaigns and search rankings.
Most users choose SpyFu for Google Ads account analysis, PPC keywords tracking, and affordable pricing.
スパイフー
SpyFu reveals every keyword your competitors have bought on Google Ads and every organic ranking they hold. It also provides domain contacts, ad spend estimates, and the Kombat comparison tool.
SpyFuの価格設定
SpyFu offers a free account with limited access. Here are the paid plans.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 基本 | 月額29ドル | 個人でマーケティング活動を行う方やSEO初心者の方 |
| プロ＋AI | 月額89ドル | Growing teams needing API access |
| チーム／代理店 | 月額187ドル | Digital marketing agencies |
Pricing verified April 2026.
無料トライアル: Yes. SpyFu offers a free account that lets you try many features at no cost.
返金保証: 有料プランはすべて30日間返金保証付きです。
📌 注記： SpyFu includes unlimited searches and data exports on all paid plans. Annual subscriptions come with a 30% discount.
⚠️ 警告： The Basic plan limits you to 10,000 row search results and 250 sales leads. If you need unlimited domain overview PDFs, you’ll need the Professional plan or higher.
SpyFuの主な利点
Here’s what makes SpyFu worth considering:
- 競合他社のキーワード調査： See every keyword your competitor sites rank for, both paid keywords and organic keywords. SpyFu reveals their full SEO strategies and PPC strategies in one dashboard.
- Google Ads Intelligence: View competitors’ PPC strategies, ad copy history, estimated ad spend, and profitable keywords they bid on. SpyFu PPC analysis tools give you deep PPC insights into any Google Ads account.
- コンバットツール： Compare your domain against competitor sites using a Venn diagram that shows keyword overlaps and gaps. This keyword gap tool is great for finding core keywords you’re missing.
- 19年以上にわたるデータ： Access historical data going back nearly two decades. Track long-term keyword performance, identify emerging trends, and spot seasonal patterns in any market.
- 検索回数無制限： All paid plans include unlimited search results, unlimited data exports, and no credit system. SpyFu is an essential tool for agencies that need volume.
- 仕事 Leads Generator: Build targeted lists of domain contacts filtered by keywords, industries, and ad budgets. Digital marketing agencies use this for prospecting and outreach with valuable insights into potential clients.
What Our Team Noticed
Our writer signed up for SpyFu and explored the platform over several days. Here’s what stood out:
SpyFuの長所と短所
✅ メリット
- Starting price of $29/month is affordable for 中小企業
- 有料プランすべてで検索とデータエクスポートが無制限
- PPC research shows competitor ad copy, budgets, and keywords
- Free account available to try before buying
- Clean, user-friendly interface that’s easy to navigate
❌ デメリット
- バックリンクデータベースはAhrefsよりも小さい
- データ更新頻度は1時間ごとではなく週ごとです。
- No built-in site audit feature for technical SEO
- May need a second tool for full on-page SEO coverage
機能比較
Ready to see how Ahrefs vs SpyFu compare on the features that matter most? We’ll look at 8 key areas to help you decide.
| 特徴 | アーレフス | スパイフー |
|---|---|---|
| 開始価格 | 月額108ドル | 月額29ドル |
| 無料プラン | ❌ | ✅（数量限定） |
| バックリンク分析 | ✅ (trillions indexed) | ✅ (smaller database) |
| PPCリサーチ | ✅（基本） | ✅ (deep ad history) |
| サイト監査 | ✅ | ❌ |
| ランクトラッキング | ✅ | ✅ |
| 履歴データ | ✅ | ✅（19歳以上） |
| 無制限の検索 | ❌ (credit-based) | ✅ |
| 最適な用途 | Backlink analysis and SEO depth | PPC spying and budget SEO |
1. キーワードリサーチ
Ahrefs: The Ahrefs Keywords Explorer lets you generate keyword ideas with search volume, keyword difficulty scores, and traffic potential estimates. You can research keywords across ten search engines including Google, ユーチューブ, and Amazon. The explorer tool also shows search intent and SERP features for each target keyword, helping you conduct keyword research more efficiently.
スパイフー: SpyFu’s keyword research tool focuses on competitor keyword analysis. You can do a keyword search on any domain to see every keyword a competitor ranks for, along with search volume and keyword difficulty. The SpyFu keyword overview automatically groups keywords into topics for easier content planning, helping you find lucrative keywords and related keywords fast.
2. バックリンク分析
Ahrefs: The Ahrefs backlink profile tool displays all links pointing to any domain. It tracks referring domains, daily backlink growth, and lost links. The Ahrefs backlink data updates hourly, giving you current information for link building strategies. You can also check how much traffic competitor backlinks send through the Ahrefs Site Explorer tool.
スパイフー: SpyFu includes backlink analysis, but its database is smaller compared to Ahrefs. The Backlink Kombat feature shows links pointing to multiple competitors but not to you. This is useful for finding link building opportunities, though you may need another tool for deep backlink research.
⚠️ 警告： SpyFu’s backlink data updates weekly, while Ahrefs updates hourly. If real-time backlink monitoring matters to your SEO campaign, Ahrefs has a clear advantage here.
3. 競合分析
Ahrefs: The Ahrefs Site Explorer shows any competitor’s organic keywords, top ranking pages, and backlink profile. You can also compare keyword gap data for up to 10 competitors at once. The content explorer helps find what content performs best in any niche, providing actionable SEO data for your SEO campaign.
スパイフー: Competitor research is where SpyFu shines. The Kombat tool uses a Venn diagram to visualize keyword overlaps and gaps between your domain and competitor sites. You can see every keyword competitors target in both organic search and Google Ads campaigns.
4. PPC and Paid Search Research
Ahrefs: Ahrefs provides basic paid search data through its Site Explorer. You can see paid keywords and estimated traffic value. However, its PPC research is not as deep as its organic SEO tools.
スパイフー: PPC analysis is SpyFu’s specialty. It shows every keyword a competitor has bought on Google Ads, their ad copy variations, estimated ad spend, and ad history going back years. The Google Ads Advisor even recommends profitable keywords based on competitor bidding patterns. SpyFu PPC research covers competitors’ PPC campaigns and competitors’ PPC strategies in full detail.
5. サイト監査とテクニカルSEO
Ahrefs: The Ahrefs site audit feature crawls your site for broken links, duplicate content, slow pages, and missing meta descriptions. It produces a health score and prioritizes issues by インパクト. This makes fixing on-page SEO and page SEO problems straightforward. It is also a valuable keyword tool for reviewing your own website’s SEO performance.
スパイフー: SpyFu does not include a built-in site audit tool. If you need technical SEO crawling and page-level health checks, you’ll need to pair SpyFu with another tool. This is a gap for users who want complete SEO software in one subscription.
6. ランクトラッキング
Ahrefs: The rank tracker monitors organic keyword rankings across different locations. The Lite plan allows tracking up to 750 keywords. Ahrefs lacks device-level tracking, which means you can’t separate mobile from desktop rankings.
スパイフー: SpyFu lets you track keyword rankings over time for both organic and paid keywords. The daily performance tracker monitors weekly ranking changes across major search engines. The Team plan supports up to 40,000 tracked keywords.
7. Reporting and Data Exports
Ahrefs: Ahrefs provides an SEO reporting tool with customizable dashboards. Reports can be exported in various formats. However, the credit-based system means heavy report generation may eat through your monthly allowance faster.
スパイフー: SpyFu generates client-ready reports that combine SEO, PPC, and competitive data in one document. All paid plans include unlimited data exports and unlimited domain overview PDFs on the Professional plan. The SpyFu API gives developers access to raw SEO data for custom reporting. No credit limits apply.
8. 価格とコスト
料金プランを並べて比較してみましょう。
| プランレベル | アーレフス | スパイフー |
|---|---|---|
| Free Account | ❌ | ✅（機能制限あり） |
| エントリーレベル | 月額108ドル（ライトプラン） | 月額29ドル（ベーシックプラン） |
| 中級クラス | 月額208ドル（標準プラン） | 月額89ドル（プロ版＋AI搭載） |
| トップティア | 月額374ドル（アドバンスプラン） | 月額187ドル（チーム／代理店向け） |
Ahrefs: Starting at $108/month, Ahrefs costs nearly four times more than SpyFu’s entry plan. There is no free trial. The higher cost reflects a larger backlink database, hourly updates, and a wider feature set for serious SEO professionals.
スパイフー: At $29/month, SpyFu is one of the most affordable SEO tools with unlimited searches. The Basic plan offers strong PPC research and competitor keyword data at a fraction of the cost. Annual billing saves an extra 30%.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 予算が限られている | スパイフー | Starts at $29/mo vs $108/mo |
| ディープバックリンクデータ | アーレフス | Largest backlink index available |
| PPC競合他社のスパイ活動 | スパイフー | 19+ years of ad campaign data |
| 技術的な現場監査 | アーレフス | Built-in crawling and health scores |
| 検索回数無制限 | スパイフー | No credit system or caps |
| SEO beginner | スパイフー | Free account and lower entry cost |
💰 あなたの予算
SpyFu costs $79 less per month at the entry level. If budget matters more than backlink depth, SpyFu gives you strong competitor research without breaking the bank.
🔌 あなたの技術スタック
Ahrefs connects with Google Search Console for combined keyword data. SpyFu focuses on standalone competitor intelligence and doesn’t need third-party integrations to deliver value.
📝 SEO対策
If you do mostly organic SEO and link building, Ahrefs is the stronger pick. If you run Google Ads campaigns alongside SEO, SpyFu’s PPC insights give you an edge in paid search.
🎓 あなたの経験レベル
Both tools have clean interfaces. SpyFu’s free account makes it easier for beginners to start learning without a financial commitment.
🆓 無料トライアルとデモ
Ahrefs has no free trial or free plan. SpyFu offers a free account with limited features and a 30-day money-back guarantee on paid plans.
🛟 サポートオプション
Ahrefs customer support has received mixed reviews from users. SpyFu’s support is described as responsive and available through multiple channels.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替える場合、どのような変更が予想されますか？
🔄 AhrefsからSpyFuに切り替えますか？
✅ 得られるもの：
- Save $79+/month with SpyFu’s lower pricing
- Unlimited searches with no credit-based limits
- Deep PPC analysis with 19+ years of ad history
❌ 失うもの：
- Access to the largest backlink database with hourly updates
- Built-in site audit and technical SEO crawling
- Content Explorer for finding top-performing pages
📋切り替え方法：
- Ahrefsから追跡キーワードとバックリンクレポートをエクスポートする
- Create a SpyFu account and set up your domain projects
- Import your keyword lists and configure rank tracking in SpyFu
🔄 SpyFuからAhrefsに乗り換えますか？
✅ 得られるもの：
- Access to trillions of indexed backlinks with hourly updates
- Full site audit to catch technical SEO issues
- Content Explorer and advanced keyword research across 10 search engines
❌ 失うもの：
- 検索回数無制限 — Ahrefsはクレジット制を採用しています
- Deep PPC ad history going back 19+ years
- Lower monthly cost and free account option
📋切り替え方法：
- SpyFuからキーワードリストと競合レポートをエクスポートします。
- Sign up for an Ahrefs plan and verify your domain
- Set up rank tracking and connect Google Search Console in Ahrefs
What Our Review Didn’t Cover
This comparison focused on individual users and small teams. We didn’t test enterprise-level features, custom API usage, or white-label reporting. Our observations are based on the April 2026 versions of both tools. If you’re managing an agency with 20+ clients, your priorities may differ from what we’ve described here.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | スパイフー |
| 🔗 バックリンク分析 | アーレフス |
| 🔍キーワード調査 | アーレフス |
| 📊 PPCリサーチ | スパイフー |
| 🛠️サイト監査 | アーレフス |
| 👶 使いやすさ | スパイフー |
| 🔌 Reporting | スパイフー |
| 🏆総合優勝 | アーレフス |
🏆 受賞者：Ahrefs
Ahrefs wins 3 out of 7 categories with stronger depth in the areas that matter most for organic SEO.
最適な用途: Backlink analysis, keyword research, technical site audits, and organic search traffic growth
Ahrefs and SpyFu serve different types of search marketers. Ahrefs gives you the deepest backlink data, a full site audit, and keyword research across multiple search engines. SpyFu gives you the best PPC intelligence, unlimited searches, and a price point that works for smaller budgets.
SpyFu is the better deal if you focus on paid search and competitor keyword spying. It also fits SEO beginners who want to learn without a big upfront cost.
However, if you need a complete SEO platform for organic growth, Ahrefs covers more ground in one subscription.
Ahrefsの比較をもっと見る
Here’s how Ahrefs stacks up against other SEO tools:
Ahrefs vs Semrush
Ahrefsが勝利した点： Larger backlink database, cleaner keyword data interface, faster crawl updates
Semrushが優れている点： Built-in content marketing tools, advertising research depth, offers a free trial
Ahrefs vs モズ
Ahrefsが勝利した点： Backlink index size, keyword database breadth, hourly data freshness
Mozが勝利した点： Lower starting price, beginner-friendly community, established Domain Authority metric
Ahrefs vs SEランキング
Ahrefsが勝利した点： Data depth for backlinks and referring domains, content explorer tool, global keyword coverage
SEランキングで勝利した項目： More affordable plans for small teams, white-label reporting, built-in local SEO tools
Ahrefs vs ユーバーサジェスト
Ahrefsが勝利した点： Backlink data accuracy, site audit depth, professional-grade SEO metrics
Ubersuggestが勝利した点： Lifetime pricing option, lower monthly cost, simpler interface for beginners
SpyFuの比較をもっと見る
SpyFuが他の競合製品と比べてどうなのか、以下に示します。
SpyFuが勝利した点： Lower pricing across all tiers, unlimited searches, deeper historical PPC data
Semrushが優れている点： Wider feature set including content tools, larger keyword database, built-in site audit
SpyFu vs サーファー SEO
SpyFuが勝利した点： Competitor PPC campaign analysis, historical ad data, keyword gap research
Surfer SEOが勝利した点： On-page content optimization, SERP-based content briefs, NLP-driven writing suggestions
SpyFu vs マングール
SpyFuが勝利した点： PPC research tools, competitor ad spend analysis, business leads ジェネレータ
マングールズが勝利した理由： Visual keyword difficulty scoring, cleaner SERP analysis interface, lower entry pricing for keyword research
SpyFu vs SE Ranking
SpyFuが勝利した点： Unlimited searches and exports, Google Ads competitor analysis, ad history depth
SEランキングで勝利した項目： Built-in site audit, local SEO rank tracking, content marketing module
よくある質問
Ahrefsとは何ですか？
Ahrefs is an all-in-one SEO platform designed to help businesses grow their organic search traffic. It provides keyword tools for backlink analysis, keyword research, rank tracking, and the Ahrefs Site Audit. You can read our full Ahrefs review for a deeper breakdown.
SpyFuの無料版はありますか？
Yes. SpyFu offers a free account that lets you try many features at no cost. The Basic plan starts at $29/month, and the Professional plan at $89/month includes API access and unlimited domain overview PDFs. Both plans include a 30-day money-back guarantee.
AhrefsとSemrush、どちらが良いですか？
It depends on your SEO efforts. Ahrefs has stronger backlink data and an Ahrefs keyword database that covers multiple search engines. Semrush offers better advertising research, content marketing tools, and a user-friendly interface for managing SEO strategies. Both are among the best SEO tools for professionals.
SpyFuの用途は何ですか？
SpyFu is a competitor research tool for SEO and PPC. It reveals the keywords your competitors rank for, their Google Ads campaigns, ad copy variations, and estimated ad spend. You can also track keyword rankings over time and find valuable keywords to target for your own search queries.
Ahrefsは料金に見合う価値があるのか？
For SEO professionals who rely on backlink data and keyword research daily, yes. The backlink database, Ahrefs content explorer, and site explorer tool are hard to match with other SEO tools. However, Ahrefs pricing starts at $108/month, which may be too high for SEO beginners or small blogs with limited SEO efforts.
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