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AI Writer
What AI Writer is
AI Writer is a web service for teams creating articles for their own media. Its workflow takes a draft from topic and keyword selection through a title and heading structure to body text. For research, the SEO analysis engine automates keyword analysis and competitor research, and suggests headlines. A separate SERP analysis summarizes information about competitor sites for a target keyword. The editor combines an AI assistant with comments, text replacement, and accessibility checks. Its SEO review scores an article out of 100 and recommends improvements.
The service is intended for owned-media article production and is designed for use without specialist knowledge. It is available on the web. A seven-day free trial includes all features and allows up to five articles; no credit card is required. The FAQ says submitted information is not used for machine-learning training, and the maker’s service guide says customers hold copyright in text created with AI Writer. Paid plans range from 個人プラン to スタンダード, with a custom option for teams that need tailored user, article, or project counts. AI Writer was founded in 2021 and is headquartered in Tokyo, Japan.
Who it suits
AI Writer suits owned-media teams that need a structured process for researching and drafting articles, along with SEO review tools. Its maker says it can be used without specialist knowledge, and the available plans cover different team sizes and monthly article volumes.
What it does well
- Drafting proceeds from topic and keyword through title, headings, and body text.
- SEO tools cover keyword analysis, competitor research, and headline suggestions.
- Article reviews provide a score out of 100 and improvement suggestions.
- The editor includes comments, text replacement, and accessibility checks.
- The trial includes all features and permits up to five articles.
What to know first
- There is no free plan beyond the seven-day trial.
- The 個人プラン allows one user and five articles per month.
- Paid plan prices are listed before tax.
Limits
The free trial lasts seven days and allows up to five articles. The cheapest paid plan, 個人プラン, covers one user, five articles per month, and one project; its AI assistant generation characters are unlimited.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| ライト | 年払いで36,000円/月（税別）; 月払い40,000円/月（税別） · 2名 · 20記事/月 · 1プロジェクト · AIアシスタント生成文字数無制限 | ¥36,000 a month |
| 個人プラン | 年払いで9,000円/月（税別）; 月払い10,000円/月（税別） · 1名 · 5記事/月 · 1プロジェクト · AIアシスタント生成文字数無制限 | ¥9,000 a month |
| スタンダード | 年払いで90,000円/月（税別）; 月払い100,000円/月（税別） · 5名 · 60記事/月 · 3プロジェクト · AIアシスタント生成文字数無制限 | ¥90,000 a month |
| カスタマイズプラン | 要相談 · 利用人数 · 記事数 · プロジェクト数はカスタマイズ | On request |
As ai-writer.jp lists them, read 3 Oct 2026. The maker's own page has the final word.
Getting started
- Open https://ai-writer.jp/ in a web browser.
- Start the seven-day free trial; it includes all features and does not require a credit card.
- Use the trial for up to five articles.
- Choose a paid plan if you need ongoing use beyond the trial.
Verdict
Choose AI Writer if your team produces owned-media articles and wants drafting stages, SEO analysis, and article review in one web service. The seven-day trial offers all features for up to five articles. Look elsewhere if you need a free plan or a platform other than web.
Questions
Does AI Writer have a free plan?
No. It offers a seven-day free trial with all features and up to five articles, without requiring a credit card.
How much does AI Writer cost?
個人プラン is 9,000 JPY per month with annual billing or 10,000 JPY per month with monthly billing, before tax. ライト is 36,000 JPY per month annually or 40,000 JPY monthly; スタンダード is 90,000 JPY per month annually or 100,000 JPY monthly. カスタマイズプラン pricing is by consultation.
Which platforms does AI Writer support?
AI Writer is available on the web.
Who makes AI Writer?
The maker’s service guide identifies 合同会社ゼロイチスタート as the company. It was established on 2021-08-31 and has an office in Chuo-ku, Tokyo.
Who owns copyright in AI-generated text?
The maker’s service guide says copyright in text created with AI Writer belongs to the customer.
Facts from AI Writer's own pages
- Article workflow
- The AI creates articles through steps covering topic, keyword, title, heading structure, and body text. · ai-writer.jp, 3 Oct 2026
- Billing
- The FAQ says payment is available by credit card or bank transfer. · ai-writer.jp, 3 Oct 2026
- Copyright
- The maker's service guide says copyright in text created with AI Writer belongs to the customer. · ai-writer.jp, 3 Oct 2026
- Data use
- The FAQ says submitted information is not used for machine-learning training. · ai-writer.jp, 3 Oct 2026
- Editor
- The editor includes an AI assistant, comments, text replacement, and accessibility checks. · ai-writer.jp, 3 Oct 2026
- Founded
- 2021 · ai-writer.jp, 28 Sept 2026
- Headquarters
- Tokyo, Japan · ai-writer.jp, 28 Sept 2026
- Intended users
- The maker describes the service as intended for owned-media article production and says it can be used without specialist knowledge. · ai-writer.jp, 3 Oct 2026
- Maker
- The maker's service guide identifies the company as 合同会社ゼロイチスタート, established on 2021-08-31, with an office in Chuo-ku, Tokyo. · ai-writer.jp, 3 Oct 2026
- Purpose
- AI Writer is a service for owned-media teams that streamlines article production. · ai-writer.jp, 3 Oct 2026
- SEO analysis
- Its SEO analysis engine automates keyword analysis, competitor research, and headline suggestions. · ai-writer.jp, 3 Oct 2026
- SEO review
- Its SEO review scores an article out of 100 and suggests improvements. · ai-writer.jp, 3 Oct 2026
- SERP analysis
- The SERP analysis feature summarizes competitor-site information for a target keyword. · ai-writer.jp, 3 Oct 2026
- Support
- The homepage says it offers manuals, video tutorials, and support; plan details list email and chat support. · ai-writer.jp, 3 Oct 2026
- Trial
- The seven-day free trial allows up to five articles, includes all features, and does not require a credit card. · ai-writer.jp, 3 Oct 2026
Where AI Writer stands on Freedom251
- SEO Writing Software#15 of 29