Marcus by Department of Product · Last updated: March 2026
Marcus is an AI-powered prompt library and thinking system designed for senior executives and C-suite leaders. The platform provides curated prompts, frameworks, and structured thinking tools to support strategic decision-making, communication, and leadership practice.
Marcus is operated by Department of Product Ltd. References to "Marcus," "we," "our," or "us" in these Terms refer to Department of Product Ltd and its affiliates.
Marcus is intended for professional use. To create an account and use the platform you must:
Marcus reserves the right to decline or revoke access at its sole discretion, including where use appears inconsistent with these Terms or the intended professional purpose of the platform.
Subject to your compliance with these Terms, Marcus grants you a limited, non-exclusive, non-transferable, revocable licence to access and use the platform for your own internal professional purposes.
This licence does not permit you to:
When you use Marcus, you may provide inputs, instructions, context, or other content ("User Content"). You retain ownership of your User Content.
By submitting User Content, you grant Marcus a limited licence to process it for the sole purpose of providing the service to you. We do not use your inputs to train AI models without your explicit consent.
You are responsible for ensuring that your User Content does not:
Marcus uses AI to generate prompts, frameworks, and suggested outputs. You acknowledge that:
Nothing produced by Marcus constitutes professional advice of any kind. Where specialist guidance is required, you should consult a qualified professional.
You agree to use Marcus only for lawful, professional purposes. You must not use the platform to:
We reserve the right to suspend or terminate access immediately and without notice where we believe these provisions have been breached.
Access to Marcus is provided on a subscription basis. Pricing, billing frequency, and included features are set out at the point of purchase and may be updated from time to time with reasonable notice.
7.1 Billing
Subscriptions are billed in advance on a monthly or annual basis, as selected at sign-up. Payment is processed securely via our payment provider. By subscribing, you authorise us to charge your payment method on a recurring basis.
7.2 Cancellation
You may cancel your subscription at any time. Cancellation takes effect at the end of the current billing period. We do not offer refunds for partial periods except where required by applicable law.
7.3 Price Changes
We reserve the right to change our pricing with reasonable notice. Where a price increase applies to your subscription, we will notify you at least 30 days in advance. Continued use following the effective date of a change constitutes acceptance of the new pricing.
All intellectual property in the Marcus platform — including the prompt library, interface design, underlying technology, and brand — is owned by or licensed to Department of Product Ltd. Nothing in these Terms transfers any ownership of that IP to you.
The name Marcus, the platform concept, and the associated brand identity are proprietary. You may not use them without our prior written consent.
Our Privacy Policy sets out how we collect, use, store, and protect your personal data. By using Marcus, you acknowledge that you have read and understood our Privacy Policy, which forms part of these Terms.
We take data security seriously. Access to user data is restricted, and we do not sell personal data to third parties.
Marcus treats your account activity and inputs as confidential. We will not disclose your use of the platform or the content of your sessions to third parties except where required by law, necessary to operate the service, or with your consent.
You acknowledge that you remain responsible for any confidential or sensitive information you choose to input into the platform.
Marcus is provided "as is" and "as available." To the fullest extent permitted by law, we make no warranties, express or implied, regarding the platform, including as to accuracy, fitness for purpose, availability, or non-infringement.
We do not warrant that Marcus will be uninterrupted, error-free, or free of harmful components. We reserve the right to modify, suspend, or discontinue any feature of the platform at any time.
To the maximum extent permitted by applicable law, Marcus and its officers, directors, employees, and affiliates shall not be liable for any indirect, incidental, consequential, or punitive damages arising from your use of the platform, including loss of profits, data, or business opportunity.
Our total aggregate liability to you in connection with these Terms shall not exceed the fees paid by you to Marcus in the three months preceding the claim.
Nothing in these Terms limits liability for death or personal injury caused by negligence, fraud, or any other liability that cannot be excluded by law.
We may update these Terms from time to time. Where changes are material, we will notify you by email or via the platform with at least 14 days' notice before the changes take effect. Your continued use of Marcus after that date constitutes acceptance of the updated Terms.
If you do not agree to an update, you should cancel your subscription before the effective date.
Either party may terminate the agreement formed by these Terms at any time. We may terminate or suspend your access immediately and without notice if we reasonably believe you have breached these Terms or that continued access poses a risk to the platform or other users.
On termination, your licence to use Marcus ceases. Provisions that by their nature should survive — including IP ownership, liability limitations, and dispute resolution — will continue to apply.
These Terms are governed by the laws of England and Wales. Any dispute arising in connection with these Terms shall be subject to the exclusive jurisdiction of the courts of England and Wales.
Before initiating formal proceedings, we encourage you to contact us to seek an informal resolution. We will endeavour to respond substantively within 10 business days.
If you have any questions about these Terms, please contact us:
Department of Product Ltd support@departmentofproduct.com departmentofproduct.com