Avalonia Enterprise
Direct support from the
engineers who build Avalonia.
A private help desk, contracted response times, emergency hot patches and long-term support releases. From €21,000 a year, including three developer seats.
When it pays for itself
Five situations
Enterprise is built for.
The framework is free and stays free. Enterprise is for the weeks when Avalonia itself becomes the thing between your team and a release.
If one of these is your week, the agreement pays for itself the first time you use it.
A senior developer has lost a week to framework behaviour.
Open a ticket on the private help desk and it reaches the engineers who wrote that code, with a contracted response time. If a release is blocked, it escalates to Avalonia’s executive team.
You are about to make an architecture choice you cannot easily reverse.
Quarterly technical reviews put Avalonia engineers in the room before your team commits to a platform, a rendering approach or an upgrade plan.
An upgrade is competing with feature work.
Avalonia 12.0 is the current LTS release, with five years of security updates and critical fixes backported. Move when your roadmap allows.
A second team is adopting the same stack.
One agreement covers the organisation. Add seats as teams join, and every seat gets the same tools, support, source code and air-gapped activation.
The Cyber Resilience Act has landed on your risk register.
Enterprise supplies the component-supplier side of your compliance file: a support contract with the maintainers, direct advisory notifications and LTS security updates.
What is in the agreement
Eight things you get.
Every seat, every year.
Every seat includes everything in Pro: DevTools, Parcel, Hot Reload and the premium UI controls. These eight are what Enterprise adds for every licensed developer. Extended support past the LTS window and hands-on development are scoped separately.
1 day
Initial response, EU working days
8 hours
Critical issue response
5 years
Security updates on LTS releases
3 seats
Included in the base fee
Private help desk
Framework issues go to the engineers who build Avalonia, on every supported platform and on embedded Linux. If a release is blocked, the ticket escalates to Avalonia’s executive team, who resolve it directly or manage it through to resolution.
Contracted response times
An initial response within one EU working day, eight hours for critical issues (three escalations a year), and priority bug fixes. Emergency hot patches ship in the nightly feed first, with the stable release coordinated with you.
Reviews and consultations
A technical check-in every quarter, four video consultations per seat each year, and roadmap access on request. Pull requests from your team get priority attention in review.
Annual architectural audit
One review of your application’s Avalonia architecture each year by Avalonia engineers, with written recommendations before your team commits to a platform, a rendering approach or an upgrade plan.
Long-term support
Avalonia 12.0 is the current LTS release. Every major version, and every fourth minor release after it, is designated LTS, with five years of security updates and critical fixes backported, so staying patched never forces an upgrade onto your roadmap.
Source code
The framework is MIT and its source is public. Enterprise adds the full source for the premium controls, so nothing your product depends on is a black box.
Air-gapped activation
A licence key for the tools and premium components that activates entirely offline. No account sign-in, cloud service or licence server, so a 100% air-gapped network is supported.
IP indemnity, capped
Avalonia defends you against third-party claims that the commercial tools and controls infringe a patent, copyright or trade secret, capped at the fees you paid in the previous twelve months. The MIT framework is outside it.
Your Enterprise agreement
Put a number
on your team’s plan.
The annual base fee covers three developer seats and the whole agreement. Each additional seat has a flat annual price, lower from the 11th and 26th seats.
One base fee, three seats included.
Support, reviews, LTS, tools and source code all come with the base fee. Nothing in the agreement is priced separately.
Additional seats at a flat annual rate.
Seats are priced by band: 4 to 10, 11 to 25, and 26 onward. Every seat gets the same benefits.
A written quote in one step.
Name and email. No call needed to request one.
Your annual agreement
First 3 included in the base fee.
Annual total · EUR
€21,000
The base fee. Includes 3 seats. Excludes tax.
Volume discounts start with seat 11.
Each lower rate applies only to seats within that band.
Your next seat: €2,100 / year.
How your price is calculated
- Annual base, including 3 seats: €21,000.
- Seats 4–10: 0 × €2,100 = €0 / year.
- Seats 11–25: 0 × €1,550 = €0 / year.
- Seats 26 onward: 0 × €1,100 = €0 / year.
Just your name and email. We’ll send a written quote for your selected team size.
EU Cyber Resilience Act
If the CRA is on your
risk register, start here.
Reporting obligations have applied since 11 September 2026, and the full requirements apply from 11 December 2027. Compliance stays with you. Enterprise gives your technical file what it needs from a component supplier.
Article 13(5)
Due diligence on the components you integrate
A named steward, a published security policy and per-package SBOMs are free for everyone. Enterprise adds a support contract with the framework’s maintainers that your technical file can cite, and answers to your procurement and security questionnaires.
Annex I, Part II
Security updates for as long as you support your product
Fixes land in the current release for everyone. Enterprise adds LTS releases with five years of security updates and critical fixes backported, so staying patched never forces a major upgrade onto your roadmap.
Article 14
Actively exploited vulnerabilities reported within 24 hours
The public advisory feed is free. Enterprise customers are notified directly when an advisory affects a product they license, and bring the impact assessment to the help desk under a contracted response time.
Article 13(19)
Documentation your technical file can cite
Compliance documentation, security reviews and procurement reviews for the products we manufacture are handled for Enterprise customers, including each product’s support period end date. The public policy and SBOMs are the full extent of what we can provide otherwise.
The people who answer your ticket wrote the code.
Our support desk, January to September 2026
98.3%
Customer satisfaction
60%
Resolved in the first response
7h 22m
Average response time
Enscape by Chaos. Built with Avalonia.
“…we got a direct support contract with the Avalonia team and that also helped us a lot in critical moments. They solved some issues that we reported and also accepted some changes proposed by members of our team.”
Tanya Dilkovska-Petrova
Chaos · On direct engineering support
Teams building with Avalonia
Real products.
Roadmaps that keep moving.
Less work maintaining separate interfaces. Production releases that keep shipping. See what these teams achieved with Avalonia.
3 → 1
Desktop UI codebases
Unity’s version control team brought its desktop clients together on Avalonia, keeping C# and reducing the work of maintaining separate interfaces.
Read the Unity story
100%
Windows UI migrated. Releases kept shipping.
Devolutions moved Remote Desktop Manager’s Windows UI to Avalonia, view by view, while continuing to deliver production releases.
Read the Devolutions story
FAQ
A few things worth knowing.
Clear answers for your team and the people signing off the investment.
Avalonia Enterprise brings developer tools, premium UI controls, engineering support and Long-Term Support into one annual agreement for your organisation. We scope the agreement around your teams and seat requirements. Every licensed Enterprise developer receives the full benefits, and you can add seats as your organisation grows.
Plus equips developers with professional tooling. Pro adds premium UI controls. Enterprise includes everything in Pro, plus source code for premium controls, air-gapped activation, private engineering support, contracted response times, quarterly technical reviews and Long-Term Support. It gives your organisation an ongoing relationship with the team behind Avalonia.
No. The Avalonia framework remains free and open source under the MIT licence. Enterprise is an optional investment in your team’s productivity and your product’s continuity, adding commercial tooling, controls and engineering backing to that open foundation.
The annual base includes three developer seats. Additional seats use volume bands: seats 4–10, 11–25 and 26 onward. Each lower rate applies only to the seats within that band. Every seat receives the same Enterprise benefits. Use the calculator on this page to see your annual total in USD, EUR or GBP, then request a written quote with your name and email.
Support requests go directly to the engineers who build and maintain Avalonia, through a private help desk. If a release is blocked, the ticket escalates to Avalonia’s executive team, who either resolve it directly or manage it through to resolution. Enterprise includes a contracted initial response within one EU working day (eight hours for critical issues) and priority bug fixes. Emergency hot patches for framework defects land in the nightly feed first, and we coordinate the stable release that carries the fix with you. Response commitments cover the initial response; resolution depends on the issue.
Avalonia 12.0 is the current LTS release. Every major version, and every fourth minor release after it, is designated LTS, and each receives five years of security updates, with critical maintenance fixes backported to supported releases. LTS focuses on stability; new features continue in current releases. Extended Support beyond the standard window is available as a separately scoped add-on.
Yes, fully. Enterprise issues a licence key for the tools and premium components that activates entirely offline: no account sign-in, cloud service or licence server, so a 100% air-gapped network is supported. Enterprise also includes full source code for premium controls, giving your engineers visibility into the code they depend on.
Yes. Pull requests and reproducible issues from Enterprise customers get high priority and attention in our reviews. Whether a change is merged still depends on it fitting the framework’s direction and quality bar, the same as any contribution.
Yes, for the commercial software. If a third party claims that the tools or premium controls, as we supplied them, infringe a patent, copyright or trade secret, Avalonia UI defends the claim and covers awarded damages and costs. Liability is capped at the fees you paid in the previous twelve months, and we may also procure the right, modify the software, or refund. It does not cover the MIT framework, code you have modified, or combinations with software we did not supply. The terms are in Schedule 11 and the Master Terms.
Compliance stays with you as the manufacturer of your product; no framework or supplier can carry it for you. What Enterprise supplies is the component-supplier side of your technical file: a support contract with the framework’s maintainers, direct notification when an advisory affects a product you license, LTS releases with five years of security updates, and answers to your procurement and security questionnaires. The framework’s SBOMs, security policy and advisories stay free for everyone.
Enterprise supports your engineers with product support, quarterly technical reviews, architectural guidance and upgrade planning. Application development, migration work, training and dedicated engineering engagements are scoped separately through Professional Services. We can discuss both as part of your rollout.
Bring your team into the conversation.
Share the Enterprise overview with your engineering lead or budget owner. It covers what’s included, how the agreement works and the next step.