おすすめのAI SEOツール

おすすめのAI SEOツール の比較

価格は各社が公開している開始価格です。無料プランや試用は、価格ページに書いてあるときだけ載せます。

ランキング

仕事への適合、自律性、制御、連携、始めやすさ、情報の公開度で並べています。

価格、機能、要約

1. 1

   Frase

   Research, draft, and an optional publish step

   Frase is the one on this list that will publish to a CMS if you turn that on. Starter is $39/mo billed yearly, with a 7-day trial and no card. Leave the publish switch off until you have read a week of what it ships.

   料金

   From $39/mo billed yearly

   frase.io/pricing lists Starter at $39/mo billed yearly ($49 month to month), Professional at $103/mo billed yearly ($129 month to month), and Scale at $239/mo billed yearly ($299 month to month). Enterprise is custom. A 7-day trial needs no credit card. Last checked 5 October 2026.

   主な機能

   WordPress, Webflow, Sanity, Wix. The agent can publish when you allow it. Approval is the default for Content Guard fixes.

   Fraseの料金と機能/Fraseの代替

2. 2

   Surfer

   Writing and revising pages to a content score

   Surfer leads because an 'AI SEO agent,' in practice, is a writing assistant tied to what already ranks. Surfy plus the editor is that product, and Discovery starts at $49 a month with a public price. It will not audit your backlinks.

   料金

   From $49/mo

   Discovery is $49/mo. Standard is listed at $99/mo and higher tiers run well above that, with annual billing discounts on the public pricing page. No permanent free plan. Checked on surferseo.com/pricing on 5 October 2026.

   主な機能

   Google Docs, WordPress, Jasper. Surfy drafts and the editor nags you toward a content score. A person still chooses the page, the angle, and the publish button.

   利用者の声

   Trustpilotで何年もSurferを使う人は、コンテンツエディタが隙間と意味的なキーワードを、当てずっぽうなしで示す、と書いています。

   別のレビューは、やっていることに対して値段が高く、解約後にカードを外せない、と書いています。

   • “We’ve been using Surfer for quite some time, and it’s been a really solid tool for SEO content optimisation. The Content Editor is the standout, it makes it much easier to structure content, identify gaps, and optimise without guessing.”

     Trustpilot

   • “I have been using SurferSEO for 3 years now, and I really enjoy how it allows me to set up an article with new semantic keywords to broaden my content.”

     Trustpilot

   • “When it comes to their product, sure, it's a decent piece of software, but not better thn cheaper alternatives.”

     Trustpilot

   • “Worst ans unsecure service. There is no option to remove credit card from Surferseo website.”

     Trustpilot

   Surferの料金と機能/Surferの代替

3. 3

   Writesonic

   AI-answer tracking plus a draft

   Writesonic Starter is $79 a month billed annually, with a trial and no card. It tracks ChatGPT, Gemini, and Google AI Overviews and includes a monthly article allowance. It is not a backlink index. Use Ahrefs or Semrush for that.

   料金

   From $79/mo billed annually

   writesonic.com/pricing lists Starter at $79 per month billed annually, Basic at $199, and Growth at $399, each billed annually. Enterprise is custom. Annual billing saves 20%. The FAQ says you can start a trial with no credit card, and that there is a 7-day refund. Last checked 5 October 2026.

   主な機能

   Google Search Console, WordPress, GA4, Looker Studio. Self-serve plans include a limited number of agentic workflow runs. Publishing still needs a person.

   Writesonicの料金と機能/Writesonicの代替

4. 4

   Semrush

   The broader SEO suite, with AI as a copilot

   Semrush is the suite people mean by AI SEO tools: keywords, audits, rank, competitors. Autonomy is intentionally low. Evidence is high because the product and the price ($139.95/mo for Pro) are public. Pair it with Surfer or Jasper when the gap is the draft, not the data.

   料金

   From $139.95/mo

   A limited free account exists. Pro is $139.95/mo on monthly billing, with a lower annual rate. Guru and Business step up from there. Paid plans offer a 7-day trial. Confirm on semrush.com/pricing.

   主な機能

   Google Search Console, Google Analytics, Looker Studio. AI features draft and summarize inside a suite a person drives. Semrush does not run your SEO program.

   利用者の声

   Trustpilotの短いレビューには、無料枠が役に立ち、製品はよくできている、とまだ書いてあるものがあります。

   最近の長いレビューは、解約しても購読が残り、無料だと思っていた試用のあとで請求された、と書いています。

   • “Generous free tier, good for analytics”

     Trustpilot

   • “I really love this service. They do a great job!”

     Trustpilot

   • “They are an unscrupulous company that tricks you into keeping the subscription active.”

     Trustpilot · Fserra

   • “Free Trial is Extremely misleading. I got charged for a full month even through i attempted to cancel several times.”

     Trustpilot · Priyanka

   Semrushの料金と機能/Semrushの代替

5. 5

   Ahrefs

   The search dataset, including AI prompt tracking

   Ahrefs is the dataset Semrush is usually compared with. Lite is $129/mo and a free plan exists. It does not draft and publish the page. Use it when the gap is data, then hand the brief to a writing tool.

   料金

   Free, then $129/mo

   ahrefs.com/pricing lists Ahrefs Free, then Lite at $129/mo, Standard at $249/mo, Advanced at $449/mo, and Enterprise at $1,499/mo. Content Kit is an add-on from $99/mo. Cancelling a paid plan drops the account to Ahrefs Free. Last checked 5 October 2026.

   主な機能

   API, MCP, Looker Studio. A person runs the reports and decides what to publish. The suite does not ship the page.

   利用者の声

   Trustpilotの一つのレビューは、合わなかったプランをチームが返金し、SEOの機能自体はまだ役に立つ、と書いています。

   別のレビューは、普通の調査で不審な活動として止まり、クレジットがすぐ尽き、サポートがアクセスを戻さない、と書いています。

   • “Team happily provided a refund for the tool. I tried it for a specific use case which was not what the tool was built for, but it certainly has useful functionality for SEO.”

     Trustpilot

   • “I’ve been using Ahrefs for my SEO work, but lately it has become almost impossible to use.”

     Trustpilot

   • “You sign up for a plan thinking you can do some keyword research but GUESS WHAT: It's credit based.”

     Trustpilot

   • “Such bad organic traffic data, what a scam of a site misleading people.”

     Trustpilot

   Ahrefsの料金と機能/Ahrefsの代替

6. 6

   Clearscope

   Grading a draft and tracking AI answers

   Clearscope starts at $129/mo with a 14-day trial. It is closer to Surfer than to Ahrefs: you bring the draft, it tells you what is missing, and you still publish.

   料金

   From $129/mo

   clearscope.io/pricing lists Essentials at $129/month, Business at $399/month, and Enterprise as custom. The page offers a 14-day free trial and says monthly plans have no minimum contract. Last checked 5 October 2026.

   主な機能

   ChatGPT, Gemini. It recommends and drafts. A person still publishes.

   Clearscopeの料金と機能/Clearscopeの代替

7. 7

   Jasper

   First drafts you will still have to optimize

   Jasper integrates with Surfer, which is the tell. It is a marketing writer that can feed an SEO workflow. It is not an SEO platform. Job fit stays at 18, just above a partial-fit cut.

   料金

   From $69/mo

   Pro is $69/seat/month, or $59/seat/month billed annually. A 7-day Pro trial requires a card. No ongoing free plan. Business is custom. Read from Jasper's public pricing discussion and plan cards; confirm on jasper.ai/pricing.

   主な機能

   Surfer, HubSpot, Webflow, Google Docs. Agents and Canvas can carry a draft through a workflow. A marketer still approves anything that publishes.

   Jasperの料金と機能/Jasperの代替

8. 8

   Copy.ai

   Short marketing copy, not technical SEO

   Partial fit. Copy.ai can draft a brief or a meta description. It does not know why a URL dropped. Keep it off the critical path of an SEO program.

   料金

   From $29/mo

   Chat is $29/mo ($24/mo billed annually) with 5 seats and no workflow credits. Growth is $1,000/mo with workflow credits. There is no free plan for the platform. Confirmed against Copy.ai's public prices page.

   主な機能

   Salesforce, HubSpot, Slack. Workflows can run multi-step sales and marketing jobs. Chat alone is a copilot. The interesting autonomy starts on the workflow plans.

   利用者の声

   Trustpilotの古いレビューは、Copy.aiが商品説明に役立った、と書いています。

   その後のレビューは、ログインが動かなくなり、サポートが何か月も返事をせず、更新のあと保存したプロンプトが消えた、と書いています。

   • “Copy Ai is great. It helped me a lot with my product description. But ever since I upgraded, the composition is shorter compared to my free trial.”

     Trustpilot

   • “It had a paid subscription and used it a bit, but my login stopped working. Reached out to support via email and via the website form. No response for months even after several messages.”

     Trustpilot

   • “I was an enthusiastic used and ambassador. then the service just stopped working. nothing works.”

     Trustpilot · A.F.

   Copy.aiの料金と機能/Copy.aiの代替

近いカテゴリ

隣の仕事には別の一覧があります。

• コンテンツ制作向けAIツール
• マーケティング向けAIエージェント
• B2Bマーケティング向けAIエージェント

よくある質問

すべての製品を同じ6項目で100点満点にします。順位は合計、適合、名前の順です。 方法の全文を読む.