Version 1.0 (2 September 2025)

1. Preamble and Parties

This Community Tier Licence Agreement (the Agreement) is between Avalonia UI (AvaloniaUI OÜ) (Licensor) and the Licensee. Avalonia UI develops and owns Avalonia Accelerate. The Community Tier is provided free of charge and consists of developer tools only. By downloading, installing or using the Software, the Licensee agrees to this Agreement.

2. Definitions

Software means Avalonia Accelerate (Community Tier), consisting solely of developer tools and applications that assist with building applications with Avalonia, including any binaries and documentation that ship with those tools.

Tools means the developer utilities provided in the Community Tier, including design surfaces, IDE extensions, packaging utilities, CLI tools and related applications that run on a developer workstation.

Components means user interface controls, runtime libraries or frameworks intended for embedding in Licensee applications. Components are not included in the Community Tier and are expressly excluded from this Agreement.

Licensee means the person or entity that accepts this Agreement. Where the Software is installed on or used through systems owned or controlled by an organisation, that organisation is deemed to be the Licensee.

Organisation means any legal entity, including its subsidiaries and affiliates under common control. For purposes of determining eligibility criteria (including device count, concurrent users, and revenue thresholds), the Organisation includes all entities within the corporate group under common control, and measurements are made on a consolidated basis across the entire group.

Enterprise means an Organisation that has more than 250 users/PCs, or more than 5 people using the software concurrently, or annual consolidated revenue exceeding €1,000,000.

User means an individual natural person who uses the Tools.

Use means to install, run and interact with the Tools.

Workstation means a User’s individual desktop or laptop device that is not shared and is used in interactive sessions by that User.

Eligibility Term means the period during which the Licensee remains eligible for Community Tier use under section 3.2. It renews upon re-attestation.

Update means any bug fix or enhancement to the Tools that Avalonia UI elects to make available to Community users. There is no commitment to provide Updates.

Open-Source Component has the meaning in section 9.

3. Licence Grant and Eligibility

3.1 Grant

Subject to continuous compliance with this Agreement, Avalonia UI grants the Licensee a non-exclusive, non-transferable, revocable, no-fee licence to install and Use the Tools on Workstations for the purposes of development, testing, evaluation and internal demonstrations only. The Community Tier includes no right to embed, redistribute or ship any Avalonia UI Components, runtimes or redistributables.

The Tools may not be used on build servers, continuous integration or continuous delivery systems, remote or virtualised shared machines, containerised multi-user hosts, classroom images, training labs, or any cloud development environment. The Tools are for interactive Workstation use only.

Account registration is required. Use of personal email addresses does not change who the Licensee is for the purposes of this Agreement.

3.2 Eligibility

Community Tier Use is limited to:

a) individuals acting in a personal capacity;

b) non-Enterprise Organisations with no more than five concurrent Users of the Tools; and

c) accredited educational and non-profit research institutions for teaching and research.

Enterprises are not eligible unless expressly permitted in writing by Avalonia UI under a separate programme. Eligibility is a continuing condition. The Licensee must re-attest eligibility upon request and at least annually.

3.3 Organisational acceptance

If any User accepts this Agreement while installing or using the Tools for the benefit of an Organisation or on its systems, that Organisation is deemed to be the Licensee and is responsible for compliance by its personnel and contractors. Internal approval processes or lack of authority are not a defence.

3.4 No sale

The Software is licensed, not sold. All rights not expressly granted are reserved.

4. Restrictions

The Licensee shall not, and shall not permit any third party to:

a) modify, adapt, translate, decompile, disassemble or reverse engineer the Tools except as required by law, after first requesting necessary interoperability information from Avalonia UI;

b) remove or obscure proprietary notices;

c) make the Tools available as a standalone download or service, or publish them to any repository or image;

d) share accounts or keys, or allow anyone other than the User to access a Workstation installation;

e) simulate, disable, block or circumvent licensing, usage controls or telemetry;

f) use the Tools to build a competing developer tool, builder or packaging solution derived from the Tools;

g) use any part of the Tools as a redistributable runtime. The Community Tier contains no redistributables.

5. Telemetry

Always-on telemetry is a condition of Use. Telemetry is used to verify eligibility, measure usage, and improve the Tools. The Licensee must not disable or interfere with telemetry. Details of data categories and retention are described in Avalonia UI’s privacy documentation. Attempts to block telemetry constitute misuse and may lead to suspension or termination.

6. Support and Updates

Avalonia UI has no support obligations to Community users. Any assistance is voluntary and may be withdrawn at any time. Avalonia UI may or may not provide Updates to Community users. There is no SLA, response target or commitment to fix.

7. Verification and Remedies

Avalonia UI may request reasonable information to verify eligibility and compliance, no more than once per year, on thirty days’ written notice, or immediately where misuse is suspected. Verification will be conducted in a manner that minimises disruption.

If ineligible Use or breach is identified, the Licensee must promptly remedy it. Without limiting other rights, Avalonia UI may require the Licensee to purchase the appropriate commercial licences at current rates, backdated to the first date of ineligible Use, plus applicable interest. If the non-compliance is material, the Licensee will also reimburse reasonable verification costs and collection expenses.

Failure to cooperate with verification, or failure to cure non-compliance, is a material breach.

8. Term and Termination

This Agreement takes effect when the Software is first used and continues during the Eligibility Term. Avalonia UI may suspend or terminate the Community licence immediately for material breach, ineligibility, or interference with telemetry, or for convenience on thirty days’ written notice. The Licensee may terminate at any time by ceasing Use and deleting all copies.

Upon termination, all rights end and the Licensee must uninstall and permanently delete the Tools from all systems it controls. Previously built applications are unaffected only to the extent they do not include any part of the Tools, since the Community Tier contains no redistributables.

Sections that by their nature should survive, including 3.3, 4 to 5, 7 to 13, survive termination.

9. Open-Source Components

The Tools may include or link to Open-Source Components governed by their own licences. Those licences apply to the relevant components and prevail over this Agreement where they conflict for that component only. Nothing here restricts the Licensee’s rights under those licences. The Licensee is responsible for any obligations that arise from its own use of open source alongside or with the Tools.

10. Intellectual Property

Avalonia UI and its licensors retain all right, title and interest in and to the Software. The Licensee receives no rights to Avalonia UI names, trademarks or branding, except to factually state that the Tools were used in development.

11. Disclaimers and Liability

The Software is provided as is and as available. All warranties are disclaimed, including implied warranties of merchantability, satisfactory quality, fitness for a particular purpose and non-infringement. Avalonia UI does not warrant that the Tools will be error free or uninterrupted.

To the maximum extent permitted by law, Avalonia UI’s total aggregate liability arising out of or relating to this Agreement is limited to €100. Avalonia UI is not liable for any indirect, special, incidental, consequential or punitive loss, including loss of profits, revenue, data or business.

Nothing limits liability for death or personal injury caused by negligence, fraud or fraudulent misrepresentation, or other liability that cannot be limited by law.

12. Confidentiality

Non-public information disclosed by either party in connection with this Agreement that is identified as confidential, or should reasonably be treated as confidential, must be kept confidential and used only to exercise rights and perform obligations under this Agreement. These obligations last for five years after termination, except for trade secrets which are protected while they remain trade secrets.

13. Governing Law and Venue

This Agreement and any non-contractual obligations arising out of or in connection with it are governed by the laws of England and Wales. The courts of London, United Kingdom have exclusive jurisdiction. Avalonia UI may seek injunctive relief in any court of competent jurisdiction to protect its intellectual property or Confidential Information.

14. Notices

Notices to Avalonia UI must be sent to management@avaloniaui.net. Notices to the Licensee will be sent to the account email or other contact provided. Email notices are deemed received on the next business day at the recipient’s location if no delivery error is received.

15. Assignment

The Licensee may not assign this Agreement without Avalonia UI’s prior written consent, except as part of a bona fide sale of all or substantially all relevant business where the assignee agrees in writing to be bound. Avalonia UI may assign to an affiliate or successor without consent and will notify the Licensee.

16. Entire Agreement; Amendments; No Waiver

This Agreement is the entire agreement for Community Tier Use. It supersedes all prior or contemporaneous terms for the same subject matter. Amendments must be in writing signed by both parties. Failure to enforce any provision is not a waiver.

17. Severability

If any provision is held unenforceable, it will be enforced to the maximum extent permitted and the remainder will remain in effect. The parties will negotiate a valid substitute that most closely reflects the original intent.

18. Execution and Acceptance

Acceptance may occur electronically, including by clicking to accept, installing or using the Software. The accepting party represents that it has authority to bind the Licensee.