Terms of Service

Last updated: June 15, 2026 · Effective date: June 15, 2026

These Terms of Service (“Terms”) are a binding agreement between Sequesign Inc., a Delaware corporation (“Sequesign,” “we,” “us,” or “our”), and the person or organization accessing or using the Services (“you” or “Customer”).

These Terms govern your access to and use of Sequesign websites, applications, dashboards, hosted services, APIs, verification tools, software development kits when used with our hosted services, documentation, and related products and services (collectively, the “Services”).

By accessing or using the Services, you agree to these Terms. If you use the Services on behalf of an organization, you represent that you have authority to bind that organization, and “you” refers to that organization. If you do not agree to these Terms, do not use the Services.

If you have a separate written agreement with Sequesign, such as an enterprise agreement, order form, data processing addendum, business associate agreement, or service level agreement, that separate written agreement controls to the extent it expressly conflicts with these Terms.

1. The Services

Sequesign provides a cryptographic receipt, witness, and audit-trail platform for AI agent actions. The Services may include:

• A protocol and reference implementation for producing receipts of agent activity
• Hosted witness services that co-sign receipt chains
• Hosted storage for receipt envelopes and optional evidence content
• Online and offline verification tooling
• Dashboards for managing keys, retention policies, organizations, usage, and exports
• APIs, SDKs, documentation, and related developer tools

Sequesign may offer free, developer, paid, and enterprise tiers. Tier capabilities, limits, pricing, and usage allowances are described on sequesign.com, in an order form, or in other written materials provided by Sequesign.

2. Accounts and organization administration

You may need an account to use the Services. You agree to:

• Provide accurate and complete registration information
• Keep account credentials secure
• Maintain accurate billing and contact information
• Promptly notify us of unauthorized access or security issues
• Be responsible for activity under your account and organization workspace
• Access and use the Services in a business or commercial capacity and not as a consumer

Organization administrators may manage users, roles, keys, retention policies, hosted evidence settings, billing, exports, and related organization activity. You are responsible for selecting and supervising your administrators and users.

We may refuse, suspend, or terminate accounts as described in these Terms.

3. Acceptable use

You may use the Services only for lawful purposes and in accordance with these Terms. You agree not to:

• Violate applicable law or regulation
• Infringe, misappropriate, or violate intellectual property, privacy, publicity, or other rights
• Submit, store, or transmit content that is unlawful, defamatory, harassing, abusive, or otherwise violates these Terms
• Use the Services to create, store, verify, or facilitate evidence of illegal activity where doing so would create legal liability for Sequesign
• Attempt to interfere with, compromise, overload, disrupt, or degrade the Services, witness infrastructure, or other users’ access
• Attempt to bypass rate limits, quotas, billing controls, retention controls, access controls, or security controls
• Attempt to derive, extract, compromise, or misuse secret keys, signing infrastructure, witness infrastructure, or non-public security information
• Use the Services to distribute malware, conduct phishing, perform credential attacks, or facilitate unauthorized access
• Resell, sublicense, or commercially provide the hosted Services to third parties except as expressly permitted in a written agreement or applicable SDK license
• Misrepresent the legal effect, admissibility, completeness, or verification status of a receipt
• Use the Services in a manner that imposes unreasonable infrastructure burden or creates security, legal, or operational risk for Sequesign

We do not actively review hosted evidence content in the ordinary course. You are responsible for the content you submit and for ensuring that your use of the Services complies with applicable law.

4. Customer content

“Customer Content” means evidence content, receipt envelopes, metadata, identifiers, files, logs, messages, prompts, outputs, and other information that you or your agents submit to or generate through the Services.

You retain all rights in Customer Content. Sequesign does not claim ownership of Customer Content.

You grant Sequesign a non-exclusive, worldwide, royalty-free license to host, store, process, transmit, reproduce, display, serve, verify, export, delete, and otherwise use Customer Content solely as needed to provide, secure, support, operate, and operationally improve the Services (excluding the training of AI models); comply with retention policies and legal obligations; enforce these Terms; and perform our agreements with you.

This license ends when Customer Content is deleted from the Services, except to the extent continued processing is required for legal compliance, security incident response, dispute resolution, backup and disaster recovery, or audit-log integrity.

Sequesign does not use Customer Content to train AI models. Sequesign does not sell Customer Content. Sequesign does not use Customer Content for advertising.

You represent that you have all rights and permissions needed to submit Customer Content to the Services and to grant the license above.

5. Hash-only mode and hosted evidence storage

Sequesign may support different storage modes.

In hash-only mode, Sequesign does not store the underlying evidence bytes. Sequesign stores only cryptographic hashes and limited metadata needed to operate the Services and verify receipts. You are responsible for retaining the underlying evidence bytes outside Sequesign if you need them for future verification, audit, litigation, compliance, or business purposes.

In hosted evidence storage mode, Sequesign stores evidence content on your behalf subject to your configured retention policy, service tier, applicable limits, and these Terms. Hosted evidence may be stored under content-addressed keys and may be subject to retention floors, legal holds, export windows, or operational constraints described in the Services.

You are responsible for selecting the correct storage mode and retention settings for your use case.

6. Receipt portability and verification

Sequesign receipts are designed to support independent verification by parties with access to the relevant receipt data, public verification tools, and applicable witness public keys.

Receipts previously produced through the Services may remain cryptographically verifiable after your account ends, provided the verifying party has the data required for verification.

Sequesign does not guarantee that receipts will satisfy any particular legal, evidentiary, regulatory, industry, or contractual requirement. You are responsible for determining whether Sequesign receipts are appropriate for your use case and jurisdiction.

7. Witness operation

Sequesign operates hosted witness services that may co-sign receipt chains and maintain tamper-evident witness logs. The witness service may be described publicly on sequesign.com or through published technical documentation.

The witness log is designed to be append-only and cryptographically chained. Customers cannot direct Sequesign to retroactively modify or omit witness log entries except as the protocol and Services expressly allow.

Sequesign owns and operates the hosted witness infrastructure. The witness service’s independence from customer infrastructure is an operational property, not a representation that the witness is legally, structurally, or corporately independent from Sequesign.

Dedicated or customer-specific witness deployments may be offered under separate written agreements.

8. Fees, billing, and taxes

Paid Services are billed according to the applicable tier, order form, pricing page, usage metric, or written agreement. Fees may include recurring subscription fees, usage-based fees, storage fees, signature fees, support fees, and applicable taxes.

You authorize Sequesign and its payment processor to charge your payment method for all amounts due. If payment fails or remains overdue, Sequesign may suspend or limit access to paid Services after reasonable notice.

Unless otherwise stated in a written agreement:

• Fees are non-refundable except where required by law
• Paid tiers are billed in advance
• Usage-based fees may be billed in arrears or as otherwise described at purchase
• You are responsible for taxes other than taxes based on Sequesign’s income
• Fee changes will be communicated at least 30 days before they take effect for existing paid subscriptions

9. Free, trial, beta, and preview services

Sequesign may offer free, trial, beta, preview, experimental, or evaluation features. These features are provided for development, testing, evaluation, or feedback and may be subject to additional limits.

Unless otherwise stated in writing, free, trial, beta, preview, and experimental features are provided as-is, may be modified or discontinued at any time, and may not be covered by support, uptime, export, retention, or service commitments applicable to paid production Services.

If Sequesign materially reduces free-tier capabilities, we will attempt to provide reasonable advance notice where practical.

10. Service availability and changes

We strive to operate reliable Services, but we do not guarantee uninterrupted availability unless a separate written service level agreement applies.

The Services may be unavailable due to maintenance, upgrades, security responses, upstream provider failures, internet disruptions, customer misuse, force majeure events, or other causes.

We may modify, suspend, or discontinue features from time to time. For material changes that substantially reduce paid production functionality, we will provide reasonable notice where practical.

11. Sequesign intellectual property

The Services, including hosted systems, software, dashboards, designs, documentation, trademarks, logos, and related materials, are owned by Sequesign or its licensors and are protected by intellectual property laws.

Subject to these Terms, Sequesign grants you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Services during your account term for your business purposes, including providing services to your own customers, end users, and counterparties.

The Sequesign name, logos, and marks may not be used without our prior written permission, except as allowed by law.

12. SDKs, open-source components, and patent matters

Sequesign may make SDKs, reference implementations, command-line tools, examples, or other software available under separate licenses. If separate license terms apply to software, those license terms govern your use of that software. These Terms govern your use of the hosted Services.

Any patent rights granted in connection with an SDK, reference implementation, or other Sequesign software are limited to the patent grant, if any, expressly stated in that software’s license. Sequesign grants no patent license under these Terms beyond use of the hosted Services as documented.

The Sequesign receipt protocol, witness design, implementation techniques, or related technology may be covered by pending or issued patent rights. Except as expressly granted in these Terms, an SDK license, or a separate written agreement, no patent license is granted.

Use of the hosted Services as documented is permitted under these Terms. Any broader patent license, defensive patent commitment, open-source patent grant, or right to implement compatible services must be stated in the applicable software license or a separate written agreement.

You may not reverse engineer the hosted Services except to the extent that restriction is prohibited by applicable law.

13. Privacy and data protection

Our Privacy Policy explains how we collect, use, disclose, and retain personal information. By using the Services, you acknowledge the Privacy Policy.

Where Sequesign processes personal information on your behalf as a processor, service provider, or similar role, Sequesign’s Data Processing Addendum is incorporated into and forms part of these Terms and applies to that processing. The Data Processing Addendum includes the service-provider and processor terms required by applicable U.S. state privacy laws.

You are responsible for determining whether your Customer Content includes personal information, regulated data, confidential information, trade secrets, export-controlled information, health information, financial information, children’s data, or other sensitive information, and for using the Services in compliance with laws applicable to that information.

14. Confidentiality

If the parties exchange non-public information that a reasonable person would understand to be confidential, the receiving party will use reasonable care to protect it and will use it only to perform or receive the Services, exercise rights, comply with obligations, or as otherwise permitted in writing.

Confidentiality obligations do not apply to information that is publicly available without breach, already known without restriction, independently developed, rightfully received from a third party without restriction, or required to be disclosed by law.

Customer Content remains subject to Section 4 and the Privacy Policy.

15. Termination and suspension

You may close your account at any time through the dashboard or by contacting Sequesign.

Sequesign may suspend or terminate your account, organization, or access to the Services if:

• You violate these Terms
• You fail to pay amounts due after reasonable notice
• Your use creates legal, security, operational, or reputational risk
• Your use disrupts the Services or other customers
• We are required to do so by law or provider requirement
• Continued access would expose Sequesign to liability

Upon termination, your right to access the Services ends. For hosted evidence content, Sequesign will provide a reasonable export window of at least 30 days unless prohibited by law, security risk, nonpayment, account misuse, or a separate written agreement. After the export window, Sequesign may delete hosted evidence content according to applicable retention policies, backup practices, legal requirements, and system constraints. Hosted evidence content subject to a minimum retention floor, legal hold, or contractual retention commitment may be retained after the export window ends, subject to applicable confidentiality and access controls.

Receipts previously produced through the Services may remain independently verifiable if the verifying party has the necessary data.

16. No professional advice

The Services do not provide legal, compliance, evidentiary, security, financial, or professional advice. Sequesign does not determine whether a receipt is legally admissible, sufficient, complete, or appropriate for a particular proceeding, regulation, contract, audit, or investigation.

You are responsible for obtaining professional advice where appropriate.

17. Disclaimers

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SERVICES ARE PROVIDED “AS IS” AND “AS AVAILABLE” WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, COURSE OF DEALING, USAGE, SECURITY, AVAILABILITY, ACCURACY, OR ERROR-FREE OPERATION.

SEQUESIGN DOES NOT WARRANT THAT THE SERVICES WILL BE UNINTERRUPTED, ERROR-FREE, SECURE, FREE OF VULNERABILITIES, OR COMPATIBLE WITH YOUR SYSTEMS OR REQUIREMENTS.

SEQUESIGN DOES NOT WARRANT THE LEGAL ADMISSIBILITY, WEIGHT, SUFFICIENCY, OR EFFECT OF RECEIPTS IN ANY JURISDICTION, INDUSTRY, PROCEEDING, CONTRACT, AUDIT, OR REGULATORY CONTEXT.

18. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, SEQUESIGN’S TOTAL LIABILITY ARISING OUT OF OR RELATED TO THESE TERMS OR THE SERVICES WILL NOT EXCEED THE GREATER OF:

• THE AMOUNTS YOU PAID TO SEQUESIGN FOR THE SERVICES IN THE 12 MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM; OR
• ONE HUNDRED U.S. DOLLARS ($100).

TO THE MAXIMUM EXTENT PERMITTED BY LAW, SEQUESIGN WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, EXEMPLARY, ENHANCED, OR PUNITIVE DAMAGES; LOST PROFITS; LOST REVENUE; LOST BUSINESS; LOSS OF GOODWILL; LOSS, CORRUPTION, OR UNAVAILABILITY OF DATA; BUSINESS INTERRUPTION; COVER; OR REPLACEMENT COSTS, EVEN IF SEQUESIGN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

These limitations apply regardless of legal theory and even if a limited remedy fails of its essential purpose. Some jurisdictions do not allow certain limitations, so some limitations may not apply to you.

19. Indemnification

You will indemnify, defend, and hold harmless Sequesign, its affiliates, officers, directors, employees, contractors, agents, and representatives from and against claims, damages, losses, liabilities, costs, and expenses, including reasonable attorneys’ fees, arising out of or related to:

• Your use of the Services
• Customer Content
• Your violation of these Terms
• Your violation of law
• Your infringement, misappropriation, or violation of third-party rights
• Your products, services, agents, workflows, or integrations that use or interact with the Services

Sequesign may control the defense of any matter subject to indemnification, and you agree to cooperate with that defense. You may not settle a claim in a manner that imposes obligations on Sequesign without our written consent.

20. Third-party services

The Services may depend on or interoperate with third-party services, including cloud infrastructure, identity providers, payment processors, customer systems, AI agents, developer tools, and storage providers. Sequesign is not responsible for third-party services that it does not control.

Your use of third-party services may be governed by separate terms and privacy policies.

21. Jurisdiction and trade controls

21.1 Jurisdictional scope

Sequesign is established in the United States and the Services are operated from the United States. Sequesign does not currently target the Services at residents of the European Economic Area, the United Kingdom, or Switzerland, and does not market, price, or localize the Services for those jurisdictions. These Terms apply to all customers who access or use the Services. If you are a resident of one of those jurisdictions, by accessing the Services you acknowledge that the Services are provided from the United States and that Sequesign may impose additional terms or limitations before continuing to provide the Services to you.

21.2 Export control and sanctions

You may not use, export, re-export, import, or transfer the Services except as authorized by applicable law. You represent that you are not located in, organized under the laws of, or ordinarily resident in a country or territory subject to comprehensive U.S. sanctions, and that you are not listed on any restricted party list maintained by the U.S. government or other applicable authority.

22. Dispute resolution

22.1 Informal resolution

Before filing a formal claim, each party agrees to try to resolve the dispute informally for at least 60 days. To start informal resolution, email legal@sequesign.com with a description of the dispute.

22.2 Arbitration

Except for the exceptions below, disputes arising out of or related to these Terms or the Services will be resolved by binding individual arbitration administered by JAMS or AAA, at the claimant’s election, under the commercial rules of the selected administrator. You represent that you are accessing and using the Services in a business or commercial capacity and not as a consumer.

Arbitration will take place in Delaware unless the parties agree otherwise or unless applicable law requires a different location. The arbitrator may award relief only on an individual basis and only to the extent necessary to resolve the individual claim.

22.3 Exceptions

Either party may bring the following claims in court without first arbitrating:

• Claims for temporary, preliminary, or permanent injunctive or equitable relief
• Claims involving intellectual property rights
• Small-claims court actions within the court’s jurisdiction
• Claims that applicable law prohibits from being arbitrated

22.4 Jury and class action waiver

TO THE MAXIMUM EXTENT PERMITTED BY LAW, EACH PARTY WAIVES THE RIGHT TO A JURY TRIAL.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, CLAIMS MAY BE BROUGHT ONLY ON AN INDIVIDUAL BASIS AND NOT AS A PLAINTIFF OR CLASS MEMBER IN A CLASS, COLLECTIVE, CONSOLIDATED, REPRESENTATIVE, OR PRIVATE ATTORNEY GENERAL ACTION.

23. Governing law and venue

These Terms are governed by the laws of the State of Delaware, without regard to conflict-of-law principles.

For disputes not subject to arbitration, the parties consent to the exclusive jurisdiction and venue of the state and federal courts located in Delaware, except where applicable law requires a different venue.

24. Changes to these Terms

We may update these Terms from time to time. If we make material changes, we will provide notice by email, in-product notice, or posting on our website, as appropriate.

Unless a later effective date is stated, updated Terms are effective when posted. If a material change negatively affects your rights or obligations and you do not agree to it, you must stop using the Services before the change takes effect.

Disputes arising before the effective date of updated Terms are governed by the version in effect when the dispute arose.

25. General

These Terms, together with the Privacy Policy and any applicable order form or separate written agreement, are the entire agreement between you and Sequesign regarding the Services.

If any provision is unenforceable, the remaining provisions remain in effect. Our failure to enforce a provision is not a waiver. You may not assign these Terms without our written consent. Sequesign may assign these Terms in connection with a merger, acquisition, reorganization, financing, sale of assets, or by operation of law.

Neither party is liable for delay or failure to perform due to events beyond reasonable control, including natural disasters, war, terrorism, labor disputes, government action, infrastructure failure, internet failure, provider failure, or security incidents, except that payment obligations are not excused.

Sections intended by their nature to survive termination will survive, including Sections 4, 6, 8 (accrued payment obligations), 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, and 25.

26. Contact

For questions about these Terms, contact:

Sequesign Inc.

Legal inquiries: legal@sequesign.com

General contact: hello@sequesign.com

Mailing address: 8 The Green, Suite B, Dover, DE 19901