Zenn
Platform · this deep dive is built from the official pages of the platform itself and of the tools that support it.
Overview
Zenn is a Japanese platform where engineers publish technical material. The operator is the company Classmethod, as stated in the user agreement and on the page under the Act on Specified Commercial Transactions.
What sets Zenn apart from its neighbours in the niche is not the format but the money. The platform states its purpose this way: so that engineers who share knowledge are rewarded for it. Two mechanisms are built for that: selling your own "books" and paid badges that a reader gives to an author. Both are described in the contract with figures — a rarity for platforms of this type.
There are four entities: articles, books, "scraps" (draft notes) and Publication — team sections. An article must belong to the category Tech (verified in practice) or Idea (careers, management, roundups) — the platform describes the selection rules separately.
Who's here
Zenn discloses no public audience figures. We checked the "About Zenn" page, the media kit and the contents of the questions section — there is no user count, no publication count and no country breakdown there. The media kit contains only logos, screenshots and rules on using the mark.
The language is Japanese: the interface, the agreement and the help are in Japanese, and we found no English-language version of the site. An indirect sign of corporate presence is the Publication section, where the platform showcases implementation deep dives at Japanese companies. This is a selection by the platform itself, not independent research.
Getting started
Registration goes through an external account: the agreement speaks of authentication data of a service managed by someone other than the operator, and the questions section has an item about changing the linked Google account. A separate email is set as a backup for recovering access — an item in the "How to use" section is devoted to this.
The requirements for a user are in article 2 of the agreement: arrange your own internet access, agree to the rules and not to have broken them in the past. There is no age threshold in the version we checked. The operator has the right to refuse registration and is not obliged to explain why.
You can write in the web editor or through a link to a GitHub repository: Zenn CLI, uploading images from a repository and editing via github.dev are described in the "How to use" section.
What you can publish
A book is assembled from chapters; the official guide "How to write a book on Zenn" covers creating a book, chapter order and free chapters, the cover and the price. The price limit is stated plainly: from 0 to 5,000 yen, and some or all chapters can be opened for free.
The prohibitions are listed in article 4 of the agreement. Among them: spam (automatically generated texts and republishing the same thing), accessing paid content while bypassing payment, excessively cruel and explicitly sexual material, religious agitation, and publications whose main purpose is advertising or recruitment.
The community rules soften that last point: advertising is acceptable "to the extent of a pinned message at the end of an article". The same place holds the position on generative models: using them is not prohibited, but you should not publish without checking accuracy, nor churn out articles for the sake of followers and points.
How to grow
The platform does not disclose its feed algorithm. The list of questions has an item "Why is my article not in Trending and how does it work", but the answer page is served by script and cannot be read without a browser.
Something else is stated in plain words — about quality: the recommendation is to include personal experience and analysis rather than a retelling of the official documentation, and not to use clickbait headlines. For books the advice is direct: if you are selling, make some chapters free so the reader understands the content before buying.
There is no ad dashboard for authors: we found neither a self-service page nor a rate card for promoting publications.
Path to monetization
The payout terms are written into the contract rather than into marketing copy — this is Zenn's strong point.
The paid entity is a book. The sale of paid content is a direct transaction between seller and buyer; the operator is not a party to it. The buyer receives not a book but an "access right": rights to copy, quote and adapt are not included in it. A completed transaction cannot be cancelled, except by agreement of the parties outside the site.
The second source is paid badges. The operator sells "digital gifts", and out of the revenue from selling them the author is paid a "placement fee" (掲載料, keisairyō) depending on the amount of badges shown on the publication page.
Fees and payouts
The figures are named twice — in article 12 of the agreement and on the page under the Act on Specified Commercial Transactions — and the values match: the settlement fee is 3.6% of the sale price and the platform fee is 10% of the amount left after the settlement fee is deducted, both including tax. Settlement is handled by Stripe, and the operator does not store payment details itself.
The payout procedure is article 13. The settlement date is the last day of the month; by the 10th of the following month the operator shows the total in the personal dashboard. Then: an application must be submitted within 5 months of the settlement date; if less than 1,000 yen has accumulated, only an Amazon gift card is available; the money arrives within the month following the month of the application, and a withdrawal fee of 350 yen is deducted. If the bank details are wrong, the author bears the bank costs of the return.
Payment by the buyer is by Visa, Mastercard, American Express and Diners Club cards. Settlement is in yen, and a payout to an account presupposes a Japanese bank — this is our inference from the payout method, not a statement by the platform.
A paid product for teams
Publication Free gives you linking of members' articles, a shared page and an unlimited number of members (the number of owners is limited); Publication Pro costs 9,980 yen a month or 99,800 yen a year, with the first 30 days free. Pro includes internal review of articles, an analytics panel, up to three advertising banners in articles, pinning publications, a shared GitHub repository, a link to Google Analytics and switching off comments.
Separately, the platform states a position on who the texts belong to: an author who leaves a Publication may leave the articles there or move them to their personal ones — in both cases they remain that author's work.
Tools and automation
We found no public API for Zenn: there is no developer section on the site, and robots.txt closes off only /search. The supported tools are the Zenn CLI and the repository link, both described in the "How to use" section; RSS subscription is there too. The platform keeps the source code of the editor and utilities in an organisation on GitHub, and the change histories of the community rules and the agreement are kept there as well — a rare practice that lets you see what changed and when.
We found no third-party scheduling services with confirmed support for Zenn.
Limits and rules
- Advertising. Publications whose main purpose is advertising or recruitment are prohibited by the agreement; the rules allow only a pinned message at the end of an article.
- Spam. Auto-generating text and republishing the same thing are named as spam outright.
- Refunds. A purchase of paid content is non-refundable.
- The access right. If the operator shuts the service down, the right of access to purchased books ends.
- The seller's responsibility. Complying with the Japanese Act on Specified Commercial Transactions is the author's obligation; without that you may not sell on Zenn.
- Scraps. Available to anyone who knows the link.
Who it's for
It suits you if you write in Japanese and want not just an audience but money for systematised material: the sales mechanics are described by contract, the fees are named as numbers and the withdrawal threshold is low. It suits Japanese teams: Publication gives you a corporate blog inside a community, with an explicit position that the articles stay with the author.
It does not suit an English-speaking audience: the interface and the rules are in Japanese only. It does not suit product promotion — advertising as the main purpose of a publication is prohibited. It does not suit you if you need to withdraw funds outside the Japanese banking system: there is only one alternative to a transfer — an Amazon gift card.
Verified data
The checked data this deep dive rests on.
About the platform
the platform describes itself as follows: «Zennはエンジニアが技術・開発についての知見をシェアする場所です。本の販売や、読者からのバッジの受付により対価を受け取ることができます。»
Self-description: this is the platform's claim about itself, not an independent assessment
source, checked 2026-07-28
the service operator is the Japanese company Classmethod (クラスメソッド株式会社)
Confirmed also by the page under the Act on Specified Commercial Transactions: an address in Tokyo, support at [email protected]
source, checked 2026-07-28
the platform states its purpose this way: "so that engineers who share knowledge are rewarded for it"
The platform's claim about itself
source, checked 2026-07-28
Getting started
registration goes through a third-party service account; a separate email is set as a backup for recovering access
The operator has the right to refuse registration and is not obliged to explain why
source, checked 2026-07-28
Account and access
There is a limit on the number of posts within a period of time: «コンテンツの粗製乱造を防止する観点から、コンテンツの投稿数には一定時間あたりの上限数（レートリミット・レート制限）が設けられています» (verbatim; our translation: to prevent the mass production of shoddy content, a per-period ceiling — a rate limit — is set on the number of posts). The logic of the limit is not disclosed: «上限はさまざまな要素を組み合わせたロジックにより決定されます。このロジックは不正防止のため開示しておりません» (verbatim; our translation: the ceiling is determined by logic combining various factors; this logic is not disclosed, in order to prevent abuse). Articles, books and scraps have separate limits
Zenn nowhere ties the limit to account age — the rule is common to everyone; but it is exactly what a new author runs into. The FAQ text is delivered by client-side JS, and the page's official bundle at zenn.dev/faq/rate-limit was read
source, checked 2026-08-07
By waiting: «上限に達した場合でも、一定時間が経過すれば再び投稿できるようになります» (verbatim; our translation: even if the ceiling is reached, after some time has passed you will be able to post again). Separately, the limit can be temporarily raised on request: «他ブログサービスなどからZennにコンテンツを移行する場合、一時的に上限を緩和できます。お問い合わせフォームより申請してください» (verbatim; our translation: when migrating content to Zenn from another blogging service, the ceiling can be temporarily relaxed; please apply through the enquiry form)
Both conditions are named by the platform outright
source, checked 2026-08-07
The counting windows are named, but not the waiting period: «記事は直近24時間以内の投稿数（投稿予約中を含む）、本は直近1週間以内の投稿数に基づいて判定されます» (verbatim; our translation: articles are judged on the number of posts in the last 24 hours, including scheduled ones, and books on the number in the last week). How long to wait after the limit triggers is said only as «一定時間» — some time, with no figure
The counting window is named and the time until the limit lifts is not; nothing was invented to fill the gap
source, checked 2026-08-07
Business terms
an author who leaves a Publication may leave the articles there or move them to their personal ones — in both cases they remain that author's work in the profile
The platform's stated position
source, checked 2026-07-28
What you can publish
four entities: articles, books, scraps (draft notes) and Publication — team sections
source, checked 2026-07-28
Content
an article must, when published, belong to the category Tech (verified in practice) or Idea (careers, management, roundups)
The mechanism is intended to make searching easier for the reader
source, checked 2026-07-28
scraps are available to anyone who knows the link
source, checked 2026-07-28
when a book is sold for money, the platform recommends making some chapters free so that the reader understands the content before buying
source, checked 2026-07-28
Promotion
instead of an algorithm, the platform advises including personal experience and analysis rather than a retelling of the official documentation, and not using clickbait headlines
source, checked 2026-07-28
How the money works here
Who is admitted. Any registered user may sell paid content: the rules set no threshold by subscribers or views. A seller who carries on distance selling must themselves comply with the requirements of the Japanese Act on Specified Commercial Transactions (特定商取引法), otherwise selling through the tool is not allowed (article 7)
our translation, the original is in Japanese; the key words of the original: 有料コンテンツの販売, 販売者
source, checked 2026-08-04
Creator's share. The creator's share is not named as a separate figure. Two fees are withheld from the price of paid content: the payment fee — 3.6% of the sale price (決済手数料：有料コンテンツの販売対価の3.6％（消費税込）) and the platform fee — 10% of the amount after the payment fee is deducted (プラットフォーム手数料：…10％（消費税込）)
our translation, the original is in Japanese; article 12 of the rules
source, checked 2026-08-04
Payout minimum. There is no threshold for crediting. But if on the day of the request the total unpaid balance is less than 1,000 yen (1,000円), it cannot be received in money — only an Amazon gift card is available
our translation, the original is in Japanese; article 13 of the rules
source, checked 2026-08-04
When they pay. The reckoning date is the last day of each month (確定日); by the 10th of the following month the balance is shown in the dashboard. The creator submits a payout request within 5 months of the reckoning date; the payment arrives within the month following the month of the request. If there has been no request within 5 months, the creator is deemed to have asked for an Amazon gift card
our translation, the original is in Japanese; article 13 of the rules
source, checked 2026-08-04
How they pay. A transfer to the bank account stated (a withdrawal fee of 350 yen is withheld from the creator — 出金手数料として350円) or an Amazon gift card (Amazonギフトカード). Payments from buyers are taken by Stripe
our translation, the original is in Japanese; articles 11 and 13 of the rules
source, checked 2026-08-04
The sale of paid articles and books (有料コンテンツ, 本) and "digital gifts" — paid badges (デジタルギフト), on the sales of which the creator is paid a "placement fee" (掲載料)
our translation, the original is in Japanese; articles 7, 9 and 10 of the rules
source, checked 2026-08-04
the price of a book is from 0 to 5,000 yen; some or all chapters can be opened for free
source, checked 2026-07-28
the sale of paid content is a direct transaction between seller and buyer; the operator is not a party to it and does not intervene
The operator does not resolve disputes between users
source, checked 2026-07-28
the buyer acquires not a book but a right of access: rights to copy, quote, adapt and create derivative works are not included in it
If the service stops, the right of access ends
source, checked 2026-07-28
When they pay. the settlement date is the last day of the month; by the 10th of the following month the operator shows the total in the personal dashboard
Article 13 of the agreement
source, checked 2026-07-28
an application for payout must be submitted within 5 months of the settlement date
Article 13 of the agreement
source, checked 2026-07-28
if less than 1,000 yen has accumulated by the day of the application, a transfer to an account cannot be chosen — only an Amazon gift card is available
Article 13 of the agreement
source, checked 2026-07-28
when receiving money into a bank account a withdrawal fee of 350 yen is deducted; the money arrives within the month following the month of the application
If the details are wrong, the author bears the bank costs of the return
source, checked 2026-07-28
Affiliate links are not named directly. The rules prohibit publishing material whose main purpose is advertising or recruitment (広告または採用を主な目的としたコンテンツを投稿する行為, article 4). The guidelines ask that posts for the sake of advertising be avoided and that promotion be kept within a fixed block at the end of the article (記事末尾の固定メッセージ程度)
our translation, the original is in Japanese; no direct rule about affiliate links was found on the official pages
source, checked 2026-08-04
What must be disclosed. The rules contain no separate requirement to label advertising material. There is an obligation on the seller to comply themselves with the requirements of the Act on Specified Commercial Transactions on advertising and disclosure (特定商取引法に定める広告・表示規制), for which the site has a 特商法表記 section
our translation, the original is in Japanese; article 7 of the rules
source, checked 2026-08-04
out of the revenue from selling "digital gifts" (paid badges), a "placement fee" (掲載料, keisairyō) is paid to the author depending on the amount of badges shown on the publication page
The agreement names neither a rate nor the author's share: the wording is "calculated by a method determined by the operator"
source, checked 2026-07-28
Paid subscriptions
Publication Pro includes internal review of articles before publication, an analytics panel, up to three advertising banners in articles, pinning publications, a shared GitHub repository for all members, a link to Google Analytics and switching off comments
source, checked 2026-07-28
Pricing
the settlement fee is 3.6% of the sale price of paid content (including tax)
The same figure is named in article 12 of the user agreement
source, checked 2026-07-28
the platform fee is 10% of the amount left after the settlement fee is deducted (including tax)
The same figure is named in article 12 of the user agreement
source, checked 2026-07-28
Publication Pro costs 9,980 yen a month or 99,800 yen a year, with the first 30 days free; Publication Free is free
The free plan has an unlimited number of members, but the number of owners is limited
source, checked 2026-07-28
Limits and restrictions
robots.txt closes only /search; Bytespider, ia_archiver and a number of older crawlers are blocked separately by name
source, checked 2026-07-28
Restrictions
publications whose main purpose is advertising or recruitment are prohibited
Article 4 of the agreement
source, checked 2026-07-28
the community rules allow advertising "to the extent of a pinned message at the end of an article"
source, checked 2026-07-28
publishing automatically generated texts and republishing the same content are named as spam outright
Article 4 of the agreement
source, checked 2026-07-28
prohibited are accessing paid content while bypassing payment, excessively cruel and explicitly sexual material, discriminatory statements, encouraging self-harm and drug use, and religious agitation
Article 4 of the agreement
source, checked 2026-07-28
using generative models is not prohibited, but you should not publish material without checking its accuracy or churn out articles for the sake of followers and points
The community rules
source, checked 2026-07-28
Moderation
There is no ladder. Article 16 of the 利用規約 verbatim: «コンテンツの公開停止、閲覧制限もしくは削除、本サービスの利用の一時的な停止、登録アカウントに関わるデータの削除、または登録抹消等» (our translation: suspending publication of content, restricting access to it or deleting it, temporarily suspending use of the service, deleting data relating to the registered account, or cancelling registration); they are applied without prior notice (事前の催告を要することなく) at the operator's discretion
The Guideline merely refers on: «運営が利用規約に基づき対処します» (our translation: the operator will deal with it under the terms of use)
source, checked 2026-08-07
Legal
buyers pay by Visa, Mastercard, American Express and Diners Club cards; settlement is handled by Stripe and the operator does not store payment details itself
The agreement gives no list of countries where payouts are available
source, checked 2026-07-28
returns, cancellations and exchanges at the buyer's initiative are impossible, because the content is digital and copyable
A completed transaction can be cancelled only by agreement of the parties outside the site
source, checked 2026-07-28
complying with the Japanese Act on Specified Commercial Transactions is the seller's own obligation; without that the service may not be used to sell paid content
source, checked 2026-07-28
the change history of the agreement and the community rules is published in a repository on GitHub
A rare practice: you can see what changed and when
source, checked 2026-07-28
API access
the official automation tools: Zenn CLI, managing content in a GitHub repository, uploading images from the repository, editing via github.dev, and subscribing by RSS
The source code of the editor and the utilities is open in the organisation github.com/zenn-dev
source, checked 2026-07-28
Languages
the interface language of the home page: ja
The language is taken from the markup attribute, the versions from hreflang
source, checked 2026-07-28
the interface, the agreement and the help are in Japanese; no English-language version of the site was found
source, checked 2026-07-28
Catalogue section: all similar See also: catalogue index · region: Japan · scheduler comparison · find by situation · platform restrictions