By installing or using the Nullgen AI Blocker browser extension, or by using nullgen.ai, you agree to these Terms of Service. If you do not agree, do not use the extension or the site.

Nullgen AI Blocker is a browser extension that attempts to detect AI prompt fields on websites and prevent text input into those fields. Detection uses an on-device model and is probabilistic: it may miss some prompts (false negatives) or block fields that are not AI prompts (false positives). The marketing website describes the product and may offer downloads, newsletter signup, and the purchase and management of paid plans.

The free extension is designed to stay on. It does not provide a global off switch or a per-site allowlist. If a field is blocked by mistake, use the in-product report controls to tell us; uninstalling the extension is the way to stop protection on that browser profile.

Subject to these terms, we grant you a personal, non-exclusive, non-transferable, revocable license to install and use the extension for its intended purpose. Except to the extent expressly allowed by applicable open-source licenses for third-party components we ship, or by law, you may not: decompile, disassemble, or reverse engineer the extension; extract, copy, or reuse the on-device prompt-detection model or its associated artifacts; redistribute or resell the extension; or circumvent its technical protections, including bypassing, disabling, or manipulating administrator-managed policies delivered through enterprise device management (such as the managed storage payload or device enrollment tokens).

You agree not to misuse the extension or website, including by attempting to disrupt our services, abuse support or reporting channels, or use the product to violate the law or the rights of others. If you have a paid account, keep your credentials confidential. Administrator credentials for centralized policy management are personal to the administrator they were issued to: they may not be shared among multiple distinct users, and one organization’s account may not be used to manage devices, policies, or users that belong to another organization. Each administrator must use their own login, and each organization must hold its own subscription. You also agree not to tamper with device enrollment, forge or reuse enrollment tokens, or interfere with the blocking, approval, or reporting features on a device enrolled by an organization you do not administer.

Our Privacy Policy at https://nullgen.ai/privacy explains what we do and do not collect. In particular, we do not collect the text of AI prompts for blocking. By using the extension or website, you also acknowledge the limited technical data described there, including optional error reporting, user-initiated issue reports, and planned Google Analytics usage measurement on the site and in the extension.

Paid plans — such as the Family plan and the Educator & Enterprise plan — are subscriptions, offered at the prices shown on nullgen.ai when you subscribe, plus applicable taxes. Some paid features may not be available in every browser or region at launch. Payment methods are collected and charged by Stripe, our payment processor, on Stripe’s hosted checkout and billing portal pages. We do not store full card numbers. By starting checkout you also agree to Stripe’s terms for processing that payment. All paid plans renew automatically at the end of each billing cycle, and your payment method is charged at the start of each new cycle, unless you cancel before the billing date. You can cancel at any time from the billing portal (when linked from the dashboard) or by emailing support@nullgen.ai. When you cancel, your subscription — including access to the web dashboard and premium features — remains active until the end of the current billing cycle and then does not renew. Except where the law requires otherwise (see “Consumers in the European Economic Area” below), payments are non-refundable: we do not provide refunds or credits for partial billing periods, unused seats, or periods in which you did not use the service. For organizational accounts billed per user, administrators can adjust seat counts during a billing cycle. Added seats are charged a pro-rated amount for the remainder of the current cycle. Reduced seat counts take effect at the next renewal; removing seats mid-cycle does not generate a refund or credit for the current cycle.

If you are a consumer in the European Economic Area or the United Kingdom, you generally have a statutory right to withdraw from a distance purchase within 14 days without giving a reason. When you purchase a paid plan, you ask us to begin providing the service — including dashboard access and premium features — immediately, before the withdrawal period ends. If you exercise your right of withdrawal within 14 days of purchase, email support@nullgen.ai; we will refund what you paid, less a proportionate amount for the service already provided up to the moment you told us you were withdrawing. To the extent a purchase constitutes digital content rather than a service, you acknowledge that by consenting to immediate access you lose the right of withdrawal once access begins, as permitted by applicable law.

When a company, school, or school district deploys the extension across managed devices — including through mobile device management (MDM) tooling — the organization’s administrators hold ultimate authority over that deployment: the policies applied to fleet devices, the configuration data, and the records and metrics generated under the organization’s account. Nullgen acts on the organization’s instructions with respect to that data, as described in the Privacy Policy. The deploying organization is responsible for having the legal right to manage each device it enrolls and for making any disclosures to its users that applicable law requires. For educational deployments, the school or district is solely responsible for obtaining any parental or guardian consent required under applicable law — including COPPA and state student-privacy laws — to monitor and block usage on student devices, and for meeting its own obligations under FERPA. Nullgen relies on the deploying organization’s representation that it has that authority and any required consent.

The extension and website are provided “as is” and “as available,” without warranties of any kind, whether express or implied, including merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that detection will be complete, uninterrupted, or error-free. Nullgen AI Blocker is a preventive control, not a guarantee. The on-device model intercepts text input into fields it classifies as AI prompts, but no configuration of the product will catch every prompt field or stop every disclosure of data. To the fullest extent permitted by law, Nullgen is not liable for proprietary information, trade secrets, personal information, or any other data that is disclosed or compromised despite the extension being installed — including where a user bypasses or circumvents the blocker, where a browser, browser version, or site is incompatible or changes in a way that defeats detection, or where the model misclassifies a field (a false negative or false positive). You remain responsible for your own data-handling policies and for supervising the use of AI tools in your household or organization.

To the fullest extent permitted by law, Nullgen and its contributors are not liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, profits, or business, arising from your use of the extension or website. Our total liability for any claim relating to the extension or website will not exceed the amounts you paid us for the service in the twelve months before the event giving rise to the claim (which is zero for the free product). Nothing in these terms limits liability that cannot be limited under applicable law, including the statutory rights of consumers in the European Economic Area and the United Kingdom.

We may update these terms from time to time. The “Last updated” date will change when we do. Continued use after a change constitutes acceptance of the new terms.

Questions about these terms: support@nullgen.ai Nullgen 4041 MacArthur Blvd., Suite 400, Office 20 Newport Beach, CA 92660, United States https://nullgen.ai