Avalonia UI Telemetry
Version 1.0, effective as of 23 March 2026
1. About This Statement
This document explains how AvaloniaUI OÜ and its relevant affiliates ("Avalonia UI", "We", "Avalonia") products collect and use telemetry data. This Telemetry Statement supplements our Privacy Policy, which governs all personal data processing by Avalonia UI, including telemetry. In any conflict between this Statement and the Privacy Policy, the Privacy Policy prevails.
2. What Is Telemetry?
Telemetry refers to the automated collection of technical and usage data generated by our software, and transmitted to Avalonia UI for analysis. We use this data to understand how our products are used, identify and fix issues, improve performance, and maintain security and licensing compliance.
3. What We Collect
3.1. Categories of Data
The specific data collected may vary by product and version. The list below describes the categories of data Avalonia products may collect. The most current details for each product are available in our documentation at https://docs.avaloniaui.net. Further information on personally identifiable information and the handling thereof is noted in our Privacy Policy.
| Category | Examples |
|---|---|
| Technical performance | Application response times, error rates, crash reports; CPU, memory and disk usage; software version and configuration; operating system and hardware specification. |
| Software identification | Product package name and version used to identify the licensed product. |
| Diagnostics | Error logs, exception details, network connectivity and latency measurements, plugin and extension usage data. |
| Usage analytics | Feature adoption and frequency of use, UI interaction patterns, session duration and frequency, development workflow patterns. |
| Licensing & compliance | Licence ID, type and status; installation and activation data; hardware identification; IP address; product download, installation and uninstallation events; company or institutional affiliation (where provided or inferred). Note that this category may include personally identifiable information. See our Privacy Policy for the applicable legal basis. |
3.2. Aggregated or Pseudonymised Data
Avalonia UI also derives aggregated or pseudonymised statistics from telemetry (for example, the proportion of users on a given OS version, or average crash rates across a product release). Such derived data is not reasonably re-identifiable for any individual user or device and may be retained and used for product analytics, planning, and reporting without a fixed retention limit.
3.3. Crash Reports
3.3.1. Crash reporting is optional and strictly opt-in. Crash reports are transmitted only when you have explicitly enabled crash reporting.
3.3.2. We collect crash data to diagnose software errors, improve stability, and enhance product quality. Depending on the nature of the failure, a crash report may include application version information, operating system details, timestamps, configuration context, error messages, and stack traces. For more information on crash reports, see Section 9.3 below.
4. What We Do Not Collect
Through telemetry, Avalonia UI does not collect: (i) source code, intellectual property, or other creative work you may produce; (ii) personal files, documents, or user-created content; (iii) passwords or authentication credentials; (iv) sensitive business data or proprietary information; (v) precise location data; or (vi) the actual content of your projects or applications.
5. How We Use Telemetry
5.1. Purposes
At Avalonia UI, we use telemetry data to: (i) identify and fix bugs and performance issues; (ii) optimise software performance and reliability, including Avalonia-hosted cloud services such as package distribution; (iii) enhance existing features and develop new capabilities based on usage patterns; (iv) support troubleshooting and technical issue resolution; (v) monitor security threats and vulnerabilities; and (vi) ensure licensing and contract compliance.
5.2. Disclosure to Licensees
Avalonia UI may provide relevant telemetry data, e.g. download and usage data, to companies and institutions regarding their own Avalonia users for internal licence compliance validation purposes. Some of this information may be personally identifiable but is always tied to the company or institution's usage of Avalonia products and services.
5.3. AI and Machine Learning
Avalonia UI may use artificial intelligence ("AI") and machine learning techniques to analyse telemetry data for purposes including anomaly detection, predictive analytics, and product improvement. AI systems do not make significant automated decisions affecting you without human oversight.
6. Your Controls
6.1. Mandatory Telemetry
Licensing & compliance data collection is mandatory and cannot be disabled by the user of the licensed software. Specific product offerings with limited or restricted data collections may be offered by Avalonia UI and must be documented in writing between the parties.
6.2. Optional Telemetry
The following categories may be enabled or disabled by the user: (i) technical performance monitoring (including crash reporting); (ii) software identification; (iii) diagnostics; and (iv) usage analytics.
6.3. How to Opt Out
You may opt out of optional telemetry through in-product settings or configuration tools. Detailed, up-to-date instructions for each product are available in our documentation at https://docs.avaloniaui.net.
7. Impact of Opting Out
Disabling optional telemetry may reduce our ability to provide proactive support and to identify issues affecting your use of licensed software. Core product functionality, maintenance, access to support, and security updates are not conditional on telemetry being enabled, unless otherwise specifically stated in the applicable product documentation.
8. Data Retention and Security
| Data type | Retention |
|---|---|
| Raw telemetry data | 5 years from collection date. |
| Licensing & compliance data | 5 years after licence termination or expiry. |
| Aggregated or anonymised data | May be retained indefinitely for statistical analysis. |
| Crash report data | Retained only as long as necessary to investigate issues and improve the product, then deleted or anonymised. |
8.1. Data is encrypted in transit and at rest. For further security information, see the Data Security section of our Privacy Policy.
9. Data Sharing
9.1. Internal Use and Third-Party Processors
Telemetry data is used internally by authorised Avalonia UI personnel. Avalonia UI may also engage third-party service providers and professional advisers under appropriate confidentiality and data processing obligations. Where Avalonia UI shares telemetry data on an individually identifiable level, such sharing may be subject to disclosure where legally required or in connection with a business transfer. Further, as noted above in Section 5.2, telemetry data may be provided to your company or institution for the purpose of internal licence compliance.
9.2. No Sale of Data
Avalonia UI does not sell your personal data to third parties. For complete information on legal bases and processing purposes regarding how Avalonia UI handles personal data, see our Privacy Policy.
9.3. Note on Crash Report Content
Crash data is processed using Sentry (sentry.io), a third-party error-monitoring service, hosted on EU-based infrastructure and acting as our data processor under a data processing agreement and contractual arrangement. All crash data is stored and processed exclusively within the European Union. Crash reports are generated automatically and may unintentionally contain personal or business data such as file paths, usernames, or runtime context. We cannot guarantee that all crash reports will be entirely free of personal or sensitive information. We take reasonable technical and organisational measures to minimise unnecessary data collection, including filtering and scrubbing where feasible, and limit access to crash data to authorised personnel for debugging and quality improvement purposes only.
10. Data Processing Location
All telemetry data is stored and processed exclusively within the European Union, including in the Netherlands, France, and other EEA countries. Avalonia UI does not transfer telemetry data outside the EEA. Our third-party data processors are contractually required to process and store data within the EU. See the Data Processing section of our Privacy Policy for complete details.
11. Your Rights
11.1. You have rights regarding your telemetry data, including the right to request access, correct, delete, and object to processing. These rights are fully described in the Individual Rights section of our Privacy Policy.
11.2. To exercise your rights, contact [email protected] with "Telemetry Data Request" in the subject line. Please note that in certain situations, such as where required to retain information for contractual or legal purposes, Avalonia UI may not be able to fulfil a deletion or erasure request in full, dependent on legal, contractual, or regulatory obligations.
12. Changes to This Statement
We may update this Statement from time to time. Material changes will be communicated via the Avalonia UI website and reflected in the "Last Updated" date above.
13. Contact Information
13.1. Privacy & data requests: [email protected]. Technical support: https://avaloniaui.net/support. Documentation: https://docs.avaloniaui.net.
13.2. Postal address: AvaloniaUI OÜ, Valukoja tn 8/2, 11415 Tallinn, Republic of Estonia.