End user licence agreement

Last updated 29 September 2026

1. This agreement

This end user licence agreement (EULA) is between you and Byron Advisory Limited, trading as LINATL, a company registered in England and Wales (company number 13184834), registered office 27 Southwood Avenue, London N6 5SA, United Kingdom (we, us). It sets out your right to install and use LINATL lightsurface, including its updates, documentation and help (the software).

You accept this EULA when you install, activate or use the software. If you do so on behalf of a business, you accept it for that business and confirm that you are authorised to do so. If you do not accept it, do not install or use the software.

Your subscription, the cloud features, updates and support are governed by our terms of sale and service. If the two conflict on your right to use the software, this EULA prevails.

2. Ownership

The software is licensed, not sold. It is owned by Juridical Digital Limited and licensed to us. We grant you this licence under that arrangement, in our own name and on our own account, not as agent for Juridical Digital Limited. Juridical Digital Limited is not a party to this EULA and has no obligations or liability to you under it; your rights and remedies in relation to the software are against us alone. The LINATL and lightsurface names and logos are trade marks of Juridical Digital Limited. You receive no rights in the software or the trade marks except those this EULA expressly grants.

3. Your licence

1. While your trial or subscription is active, we grant you a non-exclusive, non-transferable licence to install and use the software, for your own personal purposes or the internal purposes of your business, on:
   • single plan: one device, a Mac or a Windows PC;
   • household plan: up to three devices, used by you and the members of your household, Macs, Windows PCs or any mix of the two;
   • trial: one device, for 7 days or 100 documents, whichever comes first;
   • custom plan: if a business agrees a bespoke plan with us, the number of devices stated in your order, which your organisation may assign among its users.
   Each device must be one you own or control.
2. You may make one backup copy of the installer. The documentation may be copied for use with the software.

4. Activation and licence checks

1. The software is activated once on each device with the licence key we send you. Activation and later licence checks connect to our licence server. Our privacy notice sets out what they send.
2. You may move your licence to another device you own or control whenever you need to. If a licence is moved more than five times in any 30 days, we may limit further moves. We may also restrict or reverse moves where their pattern indicates that a licence is being shared beyond your plan or otherwise used outside this EULA.
3. The software checks your licence on the device itself, and confirms it with our licence server from time to time, which needs an internet connection. A permanent licence needs none.

5. Permanent licence after twelve months

1. If you pay for a subscription for twelve continuous months, you earn a permanent licence to the version of the software that was current at the start of that twelve-month period, on the devices your plan covers.
2. Each further twelve continuous months of subscription moves your permanent version forward to the version current at the start of that further period.
3. A permanent licence continues after your subscription ends. It does not include the included cloud sorting, updates or support. Your own AI provider keys and local models continue to work with it.
4. If you cancel, or your subscription ends, before twelve continuous months are complete, no permanent licence is earned. A subscription that is fully refunded or reversed by a chargeback does not count towards the twelve months.

6. What you must not do

Except as this EULA allows, or as the law allows and does not permit to be excluded, you must not:

• copy, modify, adapt or translate the software, or create works derived from it;
• sell, rent, lease, lend, sublicense, distribute or otherwise make the software or your licence available to anyone else;
• decompile, disassemble or reverse-engineer the software;
• remove, disable or get round the activation, licence checks or device limits;
• remove or alter any copyright, trade mark or other notice in the software;
• use the software to build a competing product, or to provide a service to third parties.

Nothing in this EULA restricts your rights under sections 50A, 50B and 50BA of the Copyright, Designs and Patents Act 1988 (or equivalent laws elsewhere).

7. Third-party software

The software includes open-source components. Each is licensed to you under its own licence, which applies to that component in place of this EULA where they differ. They are listed, with their licences, in the software's about screen. Some features use programs or AI models that the software downloads from their publishers when you ask for them, or that you install yourself. Those are not supplied by us, and their own licences, including any use policies, apply to them.

8. Your documents

This EULA gives us no rights in your documents. The software moves the documents you bring into it into its own folders, and stores them as ordinary files on your own device, or on storage you choose.

Backing up your documents is your responsibility. Keep a backup of your documents before you bring them into the software, and keep your backups current while you use it. The software offers ways to do this under settings › backup, and works alongside your operating system's own backup. Keeping a current backup is part of taking reasonable care of your documents.

9. Updates

While your subscription is active, updates are made available to you. Some updates may be needed for the licence checks, security or legal compliance to keep working. This EULA applies to every update unless an update comes with its own terms.

10. Export and sanctions

You must not use, export or re-export the software in breach of UK, EU, US or other applicable export control or sanctions laws.

11. If the software is faulty

1. If you are a consumer, you have legal rights in relation to software that is faulty or not as described. Nothing in this EULA affects those rights.
2. If you use the software for business purposes, it is provided with the commitments in our terms of sale and service. To the extent the law allows, all other warranties and conditions are excluded.

12. Our liability

1. We are not responsible for loss or damage that is not foreseeable, or that is caused by events outside our reasonable control.
2. If you are a consumer, the software is licensed for your domestic and private use. We are not liable to you for loss of profit, business, business interruption or business opportunity.
3. If you use the software for business purposes, we are not liable for loss of profit, revenue, business, goodwill or data, or for indirect or consequential loss. Our total liability under this EULA and the terms of sale and service together is limited to the greater of the amount you paid for your subscription in the twelve months before the claim arose and the price of an annual subscription to your plan.
4. We are not responsible for the loss of a document that a current backup would have preserved (section 8).
5. Nothing in this EULA limits or excludes liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for anything else that cannot be limited or excluded by law.

13. When the licence ends

1. Your licence ends when your trial or subscription ends, unless you have earned a permanent licence (section 5).
2. We may end your licence, including a permanent licence, if you materially breach this EULA. Where the breach can be put right, we will first give you notice and a reasonable time to put it right.
3. When the licence ends, you must stop using the software, and it will stop working. Your documents are not affected: they remain ordinary files in the software's folders on your device, or on the storage you chose, and you can open them without the software.
4. Sections 2, 6, 11, 12, 13 and 14 continue after the licence ends.

14. General

• You may not transfer your rights under this EULA. We may transfer ours to another business that takes over the software, and will tell you if we do; your rights will not be reduced.
• We may update this EULA, and we will tell you before a change applies. A change that reduces your rights applies from your next renewal, so you can cancel before it does. Any other change applies 30 days after we tell you. A change the law requires, or that we need to make for security, may apply sooner. A permanent licence you have already earned stays on the EULA in force when it was earned.
• If a court finds part of this EULA invalid, the rest continues to apply. If we delay enforcing it, we can still enforce it later.
• Juridical Digital Limited may enforce sections 2 and 6 under the Contracts (Rights of Third Parties) Act 1999. No one else other than you and us has any right to enforce this EULA.
• This EULA is governed by the law of England and Wales, and the courts of England and Wales have jurisdiction. If you are a consumer living elsewhere in the United Kingdom or in another country, you keep the protection of the mandatory laws of the place where you live, and you may also bring proceedings in your local courts.