Terms of Service

1. Acceptance of terms

These Terms of Service (the "Terms") form a binding agreement between you and Tandem ("Tandem," "we," "us"). By downloading, installing, running, or creating an account on Tandem, or by using tandembase.xyz and any related property (the "Site"), you agree to these Terms.

If you are entering into these Terms on behalf of an organization, you represent that you are authorized to bind that organization. "You" then means that organization.

2. About Tandem

Tandem is an operations-platform application published by Tandem The software is offered in two tiers:

Free — unlimited local-first use, bring your own AI keys, community support.
Pro — paid subscription with additional features and, when offered, Tandem Cloud sync and support.

Public materials on the Site (features, pricing, roadmap) are informational and do not by themselves create a contract.

3. Eligibility

You must be at least 18 years old (16 where local law permits) and legally able to enter into contracts. You must not be subject to sanctions, export restrictions, or debarment by the United States or any jurisdiction in which we operate.

4. Your account

Account creation is optional for local use of the Free tier. It is required to purchase a Pro subscription or to use Tandem Cloud.
You are responsible for safeguarding your credentials. Notify us immediately at support@tandembase.xyz if you suspect unauthorized access.
One account per person or organization. No sharing credentials to circumvent tier limits.

5. Subscription and fees

Billing: Pro is billed monthly or annually in advance, in US dollars. Taxes are exclusive and added where required.
Auto-renewal: subscriptions renew automatically at the then-current rate. You may cancel from your account at any time; cancellation takes effect at the end of the current billing period.
Refunds: All sales are final, and we do not offer refunds for change of mind. You can cancel at any time to stop future charges; cancellation takes effect at the end of the current billing period. Nothing in these Terms limits any rights you may have under consumer law that cannot be excluded.
Price changes: we may change prices with 30 days' notice. Changes apply to your next renewal.
Payment processing: card payments are handled by Stripe, subject to Stripe's own terms. We do not store card numbers.
Non-payment: if a charge fails and is not cured within 15 days, we may downgrade the account to Free and suspend Pro features until payment is restored.

6. Acceptable use

When using Tandem or the Site, you agree not to:

attempt to gain unauthorized access, probe, scan, or test the vulnerability of any Tandem system without prior written authorization (coordinated security testing is welcome — email security@tandembase.xyz);
reverse-engineer, decompile, or disassemble the Tandem software except to the extent that applicable law permits despite this limitation;
redistribute, resell, or host Tandem as a service to third parties without a separate written agreement;
circumvent license keys, feature gates, or usage limits;
use Tandem to transmit malware, spam, or unlawful content, or to build systems that violate third-party rights;
interfere with or disrupt the Site, flood form endpoints, or deny service to other users;
scrape the Site beyond what is permitted by robots.txt and applicable law;
impersonate Tandem or misrepresent your affiliation with us.

We may suspend or terminate access for any user who violates these rules.

7. Your content and our software

Your content

You retain all rights in your vault, tasks, wiki pages, prompts, generated outputs, and any other content you create in or upload to Tandem (your "Content"). Your Content stays on your device in the default local-first install. We claim no ownership in your Content.

If you use Tandem Cloud, you grant Tandem a worldwide, non-exclusive, royalty-free license to host, store, transmit, and display your Content solely as needed to operate the service for you.

Our software

Tandem itself is licensed, not sold. Tandem retains all right, title, and interest in:

the Tandem software, including source, binaries, schemas, and UI;
our documentation, templates, branding, and marketing materials;
the Tandem name, logos, and brand system.

Subject to these Terms and payment of applicable fees, we grant you a personal, non-exclusive, non-transferable, revocable license to install and use Tandem for your internal operations, for the duration of your subscription (or indefinitely, for the Free tier, subject to revocation for violation).

Feedback

If you send us feedback or suggestions, you grant us a perpetual, worldwide, royalty-free license to use it without obligation.

8. BYOK and AI providers

Tandem relies on third-party model providers (Anthropic, OpenAI, Google, and others) that you configure with your own API keys. When you use BYOK:

your prompts and responses flow directly to the chosen provider, not through Tandem;
your use of that provider is governed by that provider's terms;
you are responsible for provider costs, rate limits, and compliance with provider usage policies;
Tandem has no liability for provider outages, pricing changes, or model-output quality.

You may not use Tandem to evade a provider's terms (e.g., to scrape a provider, to train competing models where prohibited, or to deliver content the provider forbids).

9. Third-party services

Tandem integrates with third-party services (Cloudflare, Stripe, Resend, model providers, optional messaging bridges). Your use of those services is subject to their own terms. Sub-processors are listed in our Privacy Policy.

10. Warranties and disclaimers

Tandem, tandembase.xyz, and all Tandem tools are provided on an "as is" and "as available" basis. To the maximum extent permitted by law, Tandem disclaims all warranties, express or implied, including implied warranties of merchantability, fitness for a particular purpose, title, non-infringement, and any warranties arising from course of dealing or usage of trade.

We do not warrant that Tandem will be uninterrupted, error-free, secure against every threat, or that AI-generated output is accurate, complete, or suitable for any purpose. You are responsible for reviewing and validating any output before acting on it.

11. Limitation of liability

To the maximum extent permitted by law:

Neither party will be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, lost revenue, lost data, or business interruption, even if advised of the possibility.
Each party's total aggregate liability under these Terms will not exceed the total fees you paid to Tandem in the twelve (12) months before the event giving rise to the claim. Tandem is an interface to third-party AI providers that you choose, configure, and pay for directly; you are responsible for your use of those providers and for their output, and Tandem is not liable for it. This does not limit any rights you may have under consumer law that cannot be excluded.

These limits do not apply to: (i) your payment obligations; (ii) your indemnification obligations; (iii) breach of confidentiality; (iv) infringement of the other party's intellectual property; or (v) liability that cannot be limited by law (e.g., fraud or willful misconduct).

12. Indemnification

You will defend, indemnify, and hold harmless Tandem and its officers, directors, employees, and contractors from third-party claims, damages, liabilities, and reasonable attorneys' fees arising out of: (a) your breach of these Terms; (b) your violation of law or third-party rights; (c) Content you provide; or (d) your misuse of Tandem or outputs generated through it.

13. Termination

By you: cancel your subscription or delete your account at any time from account settings or by emailing support@tandembase.xyz.
By us: we may suspend or terminate access for violations of these Terms, non-payment, or legal requirements. For material breach, we will use reasonable efforts to give notice and a cure period where appropriate.
Data portability on termination: Cloud-mode users may export their Content for 30 days after termination; after that, we may delete it.
Sections on intellectual property, confidentiality, warranties, liability, indemnification, governing law, and dispute resolution survive termination.

14. Export controls and sanctions

You represent that you are not located in, and will not export Tandem to, any country or party subject to US or UN sanctions, or any other jurisdiction where such export is prohibited. You will not use Tandem in connection with weapons of mass destruction or any unlawful surveillance program.

15. Changes to these terms

We may update these Terms from time to time. The updated version will be posted here with a new "Last updated" date. Material changes will be announced with reasonable prominence. Continued use after an update constitutes acceptance of the revised Terms.

16. Governing law

These Terms are governed by the laws of the jurisdiction in which Tandem is established, without regard to its conflict-of-laws principles. The United Nations Convention on Contracts for the International Sale of Goods does not apply.

17. Dispute resolution

Good-faith discussions first. Before filing anything, the parties will attempt to resolve any dispute through direct discussion between senior representatives for at least 30 days.
Forum. If that fails, any action arising out of or related to these Terms will be brought exclusively in the courts of the jurisdiction in which Tandem is established. Each party consents to personal jurisdiction and venue there.
Equitable relief. Either party may seek injunctive or other equitable relief in any court of competent jurisdiction to protect its intellectual property or confidential information.
Jury waiver. To the maximum extent permitted by law, each party waives any right to a jury trial in any proceeding arising out of these Terms.

18. Miscellaneous

Entire agreement. These Terms together with the Privacy Policy constitute the entire agreement between the parties and supersede all prior discussions on the subject.
No waiver. A failure to enforce any provision is not a waiver of future enforcement.
Severability. If any provision is found unenforceable, the rest remain in effect.
Assignment. You may not assign these Terms without our written consent. We may assign to a successor in connection with a merger, acquisition, or sale of assets.
Force majeure. Neither party is liable for failures caused by events beyond reasonable control.
Notices. Legal notices to Tandem must be sent to legal@tandembase.xyz.
Independent contractors. The parties are independent contractors. Nothing in these Terms creates a partnership, joint venture, agency, or employment relationship.
No third-party beneficiaries.

19. Contact

Tandem

Archived prior versions of these Terms are available on request from legal@tandembase.xyz.