OpusStack LLC
Effective Date: September 3, 2026
Last Updated: September 3, 2026
These Terms of Service (“Terms”) govern access to and use of the OpusStack platform, website at www.opusstack.ai, OpusOS intelligence, and related services (the “Service”), operated by OpusStack LLC (“OpusStack,” “we,” “our,” or “us”), a Maryland limited liability company.
By creating an account, completing a purchase or Charter reservation, or using the Service, you agree to these Terms and our Privacy Policy. If you do not agree, do not use the Service.
If you use the Service on behalf of an organization, you represent that you can bind that organization, and “you” includes that organization.
OpusStack is an AI-powered real estate operating system for residential and commercial real estate professionals, including individual agents and brokers, teams, brokerages, and larger organizations.
The Service may, depending on features available to your account:
AI outputs are not guaranteed. They can be wrong or incomplete. They are not legal, financial, tax, appraisal, investment, or brokerage advice. OpusStack is not a law firm, broker-dealer, lender, title company, or substitute for licensed professional judgment. You must independently verify information before you act.
Feature status. The Service is a paid production offering. We may label particular features as beta, preview, experimental, or early access. Those features may change, break, or be withdrawn. The Service as a whole is not described as a free private beta.
We do not guarantee any particular integration, Stack, or feature on a particular date. Available functionality is what appears in your account.
You must be at least 18 and legally able to enter these Terms.
You must provide accurate account information and keep credentials confidential. You are responsible for activity under your account and for users you invite.
We may suspend or terminate accounts that violate these Terms or present legal, security, or abuse risk.
The Service supports individual use and multi-user workspaces. Standard plans are distinguished primarily by included seats, additional-seat pricing, and organizational scale—not by withholding the core operating system from lower-priced plans—unless we expressly describe a different packaging at checkout.
You must only invite people you are authorized to add. You are responsible for their use of the Service.
Current plan names, included seats, additional-seat rates, optional Stacks or add-ons, and promotional offers are presented at purchase, reservation, or in your account—not frozen in these Terms.
Optional Stacks and add-ons (for example, tools we may offer for compliance, relationship or lead workflows, social, analytics, voice, or similar) may be sold separately, delayed, changed, or never launched. Purchasing a membership does not entitle you to every announced Stack.
Enterprise or other custom arrangements may be documented in an order form or separate agreement, which controls if it conflicts with these Terms on commercial points.
Taxes may apply. Prices are generally in U.S. dollars.
Before or in connection with public launch, OpusStack may offer Charter Membership to a limited number of customers. The initial Charter offer is limited to 100 Charter Memberships, unless OpusStack expressly states otherwise in the applicable offer.
Activation. For these Terms, “activation” (or “activated”) means the date we make your OpusStack account available for use and notify you that your Charter Membership has begun. Creating a login, collecting a reservation, or provisioning an account in our systems does not start the 12-month Charter period by itself.
Unless we state otherwise in the Charter offer you accept:
If you cancel your Charter reservation before your account is activated for paid Service, you will receive a refund of the reservation payment. We will process refunds to the original payment method where the processor allows, within a commercially reasonable time after we confirm cancellation.
Once the membership is activated, the reservation payment has been applied as your first month. Cancellation after activation follows Sections 6 and 7: already-charged periods are not refunded; cancellation stops future renewal.
If launch is delayed or we cannot activate Service, we will either activate when available or refund the reservation if you request cancellation before activation.
By submitting a payment method, you authorize OpusStack and Stripe (our payment processor) to charge that method for:
Subscriptions renew automatically at the end of each billing period unless you cancel before the renewal date.
If a charge fails, we may retry, notify you, and suspend access until payment succeeds. You remain responsible for amounts owed.
We may change standard prices with notice to the billing owner. The new price applies on the next renewal after notice, except that an active Charter rate for the remaining Charter term is governed by Section 5. Promotional or Charter rates do not lock standard pricing after the promotional period.
Refunds after Service begins. Except for the pre-activation Charter reservation refund in Section 5.2, monthly and other subscription charges are non-refundable once charged, including unused time in a billing period already started, unless applicable law requires a refund. Canceling stops future renewal. It does not refund a month that has already begun.
Annual plans, if offered, are described at checkout (including any advertised discount).
You may cancel renewal at any time in account billing settings or by emailing support@opusstack.ai. Cancellation stops future renewal. You keep access through the end of the period already paid. Cancellation does not refund an already-started month, unless applicable law requires it.
You will use the Service only for lawful business purposes. You will not:
We may suspend or terminate for violation.
You retain ownership of documents, data, communications, and other materials you or your users submit or connect (“User Content”).
You grant OpusStack a limited, worldwide, non-exclusive, royalty-free license to host, process, transmit, display, and create derivative operational views of User Content solely to provide and secure the Service to you and your authorized users, including processing by subprocessors listed in the Privacy Policy.
You represent that you have the rights and consents needed to provide User Content, including information about clients, counterparties, and other participants obtained from uploads or connected systems (email, calendar, CRM, and similar). You are responsible for that content and for using the Service in line with your professional and confidentiality duties.
OpusStack does not use User Content to train our foundation models or third-party foundation models. Processing to deliver the Service is not model-training as used here.
User Content placed in a workspace may be visible to other authorized members of that workspace.
Opus may run continuously in the background: monitoring connected or uploaded sources, updating understanding, identifying issues, and preparing work.
Some actions stay inside the Service (analysis, drafts, alerts). Some actions can affect outside systems or people (for example, sending a message or creating a calendar event).
Consequential external actions that the product treats as requiring approval are executed only after an authorized user approves them, except where you have clearly enabled an automation that permits a defined action without a further click. You are responsible for reviewing approvals and for automations you enable.
OpusStack is not responsible for the content of communications you approve or for decisions you make using AI output.
If you opt in to SMS, the Privacy Policy SMS terms apply. Opt-in is optional. Reply STOP to opt out. Carrier rates may apply. We do not treat SMS opt-in as consent for unrelated third-party marketing.
The Service, OpusOS, software, interfaces, models and orchestration we provide, documentation, and marks are owned by OpusStack or its licensors. You receive a limited, non-exclusive, non-transferable, revocable license to use the Service for your internal business during a paid or authorized term.
If you give feedback, you grant OpusStack a perpetual, irrevocable, royalty-free right to use it without obligation to you.
These Terms do not transfer ownership of your User Content to us.
Integrations you enable are subject to the third party’s terms. We are not responsible for those services or for their downtime or their use of data once you direct a connection.
Our Privacy Policy explains how we collect and use information and is part of these Terms.
THE SERVICE IS PROVIDED “AS IS” AND “AS AVAILABLE.” TO THE FULLEST EXTENT PERMITTED BY LAW, OPUSSTACK DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT, AND ANY WARRANTY THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR THAT AI OUTPUT WILL BE ACCURATE OR COMPLETE.
You use the Service at your own risk.
TO THE FULLEST EXTENT PERMITTED BY LAW, OPUSSTACK AND ITS OFFICERS, DIRECTORS, EMPLOYEES, AND AGENTS WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, REVENUE, DATA, OR BUSINESS OPPORTUNITY, EVEN IF ADVISED OF THE POSSIBILITY.
OpusStack’s total liability for claims arising out of the Service or these Terms will not exceed the greater of (a) the amounts you paid to OpusStack for the Service in the twelve (12) months before the claim or (b) one hundred dollars ($100).
Some jurisdictions limit these exclusions. In those places, our liability is limited to the maximum extent allowed.
You will indemnify and hold harmless OpusStack and its personnel from claims, damages, and reasonable legal fees arising out of: your use of the Service; your User Content; your users; your violation of these Terms or law; or your reliance on AI output for business decisions.
You may stop using the Service and cancel as described in Section 7.
We may suspend or terminate for violation of these Terms, suspected abuse, nonpayment, legal requirement, or if we discontinue the Service. We may terminate an unused reservation and refund it.
On termination, your license ends. Sections that should survive (including 8–10, 12, and 15–20) survive. Data handling after termination follows the Privacy Policy.
We may modify the Service. We may update these Terms by posting a new version and changing the Last Updated date, with additional notice for material changes where appropriate. Continued use after the effective date is acceptance. If you do not agree, cancel and stop using the Service.
These Terms are governed by the laws of the State of Maryland, excluding conflict-of-law rules.
Disputes will be brought in state or federal courts in Frederick County, Maryland, and you consent to that venue.
Before filing, email support@opusstack.ai and attempt an informal resolution for at least thirty (30) days unless injunctive relief is needed.
These Terms and the Privacy Policy are the entire agreement for the Service, except an Enterprise order form if one exists.
If a provision is unenforceable, the rest remains. Failure to enforce is not a waiver. You may not assign these Terms without our consent. We may assign them, including in a sale of the business.
Neither party is liable for delay caused by events beyond reasonable control.
These Terms do not create a partnership, employment, or brokerage relationship.
OpusStack LLC
3575 Katherine Way
Frederick, MD 21704
United States
