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Terms of Use and Licence

The terms that apply when you buy and use software or starter kits from Zyloft. This is a translation; the German version is binding.

Last updated: October 2026

1. Scope and contracting party

These terms apply to the digital products Zyloft offers on zyloft.eu, currently the Next.js SaaS starter kits (Cairn, Aven, Fjord) and the Windows program Zyloft Desk, and to the use of this website. The provider is Zyloft; full details are in the legal notice.

Purchases are handled by Polar as reseller (merchant of record): Polar Software, Inc., 3500 S Dupont Hwy, Dover, Delaware 19901-6041, United States. Polar is your contracting party for the purchase, handles payment, VAT and the invoice, and provides the download, access and licence key. The purchase is governed by the terms Polar shows you at checkout.

These terms set out the extent to which you may use our products. Your mandatory statutory rights as a consumer are not affected.

2. Next.js SaaS starter kits

When you buy a starter kit, you receive the full source code and the right to use it as follows:

You may

  • use the starter kit for any number of your own projects, personal or commercial,
  • build products for your clients with it,
  • modify the code as you like.

You may not

  • resell or redistribute the starter kit itself as a template, starter or boilerplate,
  • publish the starter kit's source code publicly.

Delivery and updates

After buying, you download the code as a ZIP file in Polar's customer portal, or connect your GitHub account to get access to the private repository. We publish updates in that repository.

Third-party services

The starter kits are built for services such as Stripe, Resend, a Postgres database and, for Fjord, OpenAI. You use these with your own accounts and under each provider's terms. The included legal text templates are a starting point, not legal advice.

Each starter kit's product page describes exactly what it contains, e.g. Cairn.

3. Zyloft Desk

Licence

You receive a licence key that unlocks the program permanently and does not expire. A licence can be active on a limited number of PCs at the same time. Before moving to another computer, you release the seat in the program. Zyloft Desk is intended for one person.

Activation and licence check

Activation needs an internet connection. Zyloft Desk confirms the licence online at startup and keeps working for up to 7 days without a connection; after that it has to go online once. Your client and invoice data is not sent.

Updates

The first year of updates is included in the price. After that, you can extend updates with the optional yearly update package. Without it, your installed version keeps working unchanged but gets no new features or adjustments.

Your data

Zyloft Desk stores all data locally on your PC. We have no access to it and no copy. Please make backups regularly and keep them, also with the statutory retention periods in mind.

No tax advice

Zyloft Desk helps you create invoices and handle VAT, but it does not replace tax advice. Please check with your tax advisor whether your invoices and bookkeeping meet all requirements in your case.

Features, system requirements and prices are described on the product page and in the user guide.

4. Refunds and defects

When you can get your money back and how we handle defects is set out in our refund policy. Your statutory rights, including any statutory right of withdrawal, are not affected.

5. Website and guides

The guides on this website give a general overview as of the date stated. They do not replace tax or legal advice for your individual case.

How we process personal data is described in the privacy policy.

6. Contact and changes

Questions about these terms: support@zyloft.eu.

We may update these terms for future purchases. Changes do not take away rights you acquired with a purchase already made.