Parties

These terms are entered into between Plain (also referred to as "we") and you. "You" means the individual or entity registering an account or using the service. Together with the Privacy Policy, these terms constitute the entire agreement between you and Plain.

Eligibility

You must have the legal capacity to enter into a binding contract and meet the minimum age for digital services in your jurisdiction (16 in the EU, 13 in the US, or other applicable age). If registering on behalf of an entity, you represent that you are duly authorized. Plain does not provide services to recipients prohibited under applicable export controls or sanctions.

Account and security

Safeguarding your account is your responsibility.

• Credentials

  Authentication is performed via email login links or third-party identity providers. Plain does not store passwords.

• Suspicious activity

  If you suspect unauthorized access, terminate active sessions via "log out everywhere" in settings and contact support@inplain.app.

• Account use

  Individual accounts may not be shared between multiple users. For collaborative use, please subscribe to Team.

User content

Plain claims no ownership over user content.

• Your ownership

  You retain all intellectual property rights in the content you create, upload, or generate.

• Limited license to Plain

  To provide the service, you grant Plain a worldwide, non-exclusive, royalty-free, sub-licensable (solely to necessary processors) license to host, display, back up, and distribute your content as you direct. The license is strictly limited to providing the service — it does not include model training, promotion, or redistribution — and terminates automatically when you delete the content or close the account.

• AI outputs

  Outputs you generate via AI features belong to you. AI outputs carry no warranty of originality, accuracy, or non-infringement; you are responsible for reviewing them before publication.

• Public sharing

  You may make content publicly accessible via share links; reverting to private causes Plain to cease public serving immediately.

• Portability

  Plain supports one-click export in open formats including Markdown, Plain DSL, and CSV.

Plain's intellectual property

Plain's source code, brand, visual system, design assets, documentation, and service architecture are protected by copyright, trademark, and other intellectual property laws. During your subscription you may use these assets within the service to create your content; you may not reverse-engineer them, clone the brand, or hold Plain's assets out as your own.

Acceptable use

The following uses of Plain are prohibited. Violations may result in content removal, account termination, and the right to pursue legal remedies.

• Unlawful conduct

  Content or activity that violates applicable law or public policy, including but not limited to harm to minors, threats of violence, drug trafficking, and document forgery.

• Infringement of third-party rights

  Content that infringes another party's copyright, trademark, patent, trade secret, publicity right, or privacy right.

• Fraud and impersonation

  Identity impersonation, false advertising, pyramid schemes, and deepfake-based impersonation.

• Attacks and malicious activity

  Phishing, malware distribution, command-and-control hosting, scanning or attacking other systems.

• Resource abuse

  Circumventing rate limits, mass account registration, reselling the service as a generic proxy, or using share links as a bulk CDN.

• Unauthorized data collection

  Systematic scraping of Plain's public surfaces or service for training of any commercial AI model; Plain's robots.txt expresses corresponding restrictions.

• Billing circumvention

  Evading billing obligations through multi-account use, false identities, or trial abuse.

Subscriptions and billing

Current public pricing is published at /pricing. This section sets out the billing terms.

• Subscriptions

  Plain offers Free and paid tiers; feature differences are as publicly stated at the time of subscription.

• Billing cycles

  Monthly subscriptions are charged on the same day of the following month; annual subscriptions are prepaid at the rate displayed.

• Trial

  First upgrades to a paid tier include a 7-day trial; cancellation within the trial incurs no charge.

• Refunds

  Monthly subscriptions are eligible for full refund within 7 calendar days of activation, provided usage has not exceeded the published threshold. Annual subscriptions are refundable in full within 14 days; thereafter refunds are prorated for unused months. Third-party payment fees may be deducted.

• Per-seat billing

  Team plans are billed per seat. New seats are prorated to the current cycle; removed seats take effect in the next cycle.

• Usage-based billing

  Where usage-based charges apply, actual usage is disclosed in settings in real time and is visible before charging.

• Taxes

  Published prices exclude applicable VAT, GST, and sales tax; Plain adds and remits these based on your billing address.

• Failed payments

  On payment failure, Plain will retry payment a reasonable number of times. Overdue accounts may be downgraded or locked after the statutory period.

• Price changes

  Plain will give existing subscribers at least 30 days' notice of any material price change; you may continue at the existing price through your next renewal or cancel before the new rate takes effect.

Suspension and termination

Either party may terminate under these terms.

• Termination by you

  You may delete your account at any time in settings. Subscriptions remain active through the paid period and then lapse.

• Termination by Plain

  Plain may suspend or terminate accounts for violation of Acceptable Use, prolonged nonpayment, or refund abuse. Non-material violations will be subject to prior notice and a reasonable cure period.

• Effect of termination

  Data is handled and deleted in accordance with the Privacy Policy; a 30-day grace period allows restoration or export. Prepaid amounts are refunded prorated for the unused period, except where termination is due to material breach by you.

• Survival

  Provisions relating to content ownership, confidentiality, disclaimers, limitation of liability, dispute resolution, and governing law survive termination.

Disclaimer

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE." PLAIN DISCLAIMS ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. PLAIN DOES NOT WARRANT UNINTERRUPTED, ERROR-FREE, OR ABSOLUTELY SECURE OPERATION. AI OUTPUTS ARE NOT WARRANTED AS TO ACCURACY, ORIGINALITY, LAWFULNESS, OR FITNESS FOR ANY PARTICULAR PURPOSE, AND YOU BEAR THE RISK OF DECISIONS MADE IN RELIANCE ON THEM.

Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE AGGREGATE LIABILITY OF PLAIN AND ITS AFFILIATES TO YOU OR ANY THIRD PARTY ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT (WHETHER IN CONTRACT, TORT, STRICT LIABILITY, OR OTHERWISE) WILL NOT EXCEED THE GREATER OF: (A) THE AMOUNTS PAID BY YOU TO PLAIN IN THE TWELVE MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM; OR (B) ONE HUNDRED U.S. DOLLARS (USD 100). IN NO EVENT WILL PLAIN BE LIABLE FOR LOST PROFITS, LOST DATA, GOODWILL HARM, COST OF SUBSTITUTE SERVICES, OR ANY INDIRECT, INCIDENTAL, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY. WHERE APPLICABLE LAW DOES NOT PERMIT PARTS OF THIS EXCLUSION, THE LIMITATIONS APPLY TO THE MAXIMUM EXTENT PERMITTED.

Indemnification

You agree to defend, indemnify, and hold harmless Plain, its affiliates, employees, and agents from and against any claims, losses, liabilities, and reasonable legal fees arising out of (a) your breach of these terms, (b) your content infringing the rights of a third party, or (c) your misuse or unlawful use of the service. Plain reserves the right to assume sole defense of matters concerning itself; you will cooperate and will not settle any matter in a way that affects Plain without Plain's prior written consent.

Changes to service and terms

Plain may modify, suspend, or discontinue any feature of the service upon reasonable notice. Material changes to these terms will be notified at least 30 days in advance by email and in-app notice; you may close your account before the effective date and receive a prorated refund of prepaid amounts. Continued use of the service after the effective date constitutes acceptance of the revised terms.

Governing law and dispute resolution

This agreement is governed by the laws of the Hong Kong Special Administrative Region of the PRC, excluding its conflict-of-laws rules. Any dispute will first be resolved by good-faith negotiation via support@inplain.app. Failing resolution, disputes will be submitted to institutional arbitration administered by the Hong Kong International Arbitration Centre (HKIAC) under its then-current rules, seated in Hong Kong, in English and Chinese, with the award final and binding. Nothing in this section restricts either party's right to seek interim injunctive relief in a competent court for infringement of intellectual property or confidential information. Class actions and class arbitration are expressly waived; proceedings are individual only.

General provisions

• Entire agreement

  These terms, together with the Privacy Policy and any supplemental terms expressly accepted by both parties, constitute the entire agreement concerning the service and supersede all prior communications.

• Severability

  If any provision is held unenforceable, the remainder remains in effect, and the unenforceable provision will be reformed to the extent permitted to best reflect the parties' original intent.

• Waiver

  Failure to exercise a right is not a waiver of that right.

• Assignment

  You may not assign your rights or obligations under this agreement without Plain's prior written consent. Plain may assign this agreement in connection with a merger, acquisition, or asset sale, provided the assignee assumes equivalent or greater privacy and confidentiality obligations.

• Force majeure

  Neither party will be liable for delay or failure to perform caused by events beyond reasonable control (war, earthquake, government action, large-scale third-party infrastructure incidents), provided timely notice is given.

• Language versions

  If the English and Chinese versions diverge, the English version prevails; the Chinese version may be relied upon for understanding intent.