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Both Tart Virtualization and Orchard Orchestration (coming soon) are licensed under Fair Source 100 License. Usage on personal computers including personal workstations is royalty-free, but organizations that exceed a certain number of server installations utilizing 100 CPU cores will be required to obtain a paid sponsorship.

Performance and Efficiency Cores

The virtual CPU cores in Tart VMs do not differentiate between the high-performance and high-efficient cores of the host CPU. Instead, Tart VMs automatically alternate between these types of cores depending on the workload being executed within the virtual machines. As a result, both performance and energy-efficient cores of the host CPU are treated equally in terms of licensing.


When an organization surpasses the 100 CPU cores limit, it is required to obtain a Gold Sponsorship, which costs $1000 per month. Upon reaching a limit of 500 CPU cores, a Platinum Sponsorship ($5000 per month) will be required, and for organizations that exceed 5000 CPU cores, a custom Diamond Sponsorship ($1 per core per month) will be necessary.

If your organization is interested in purchasing one of the sponsorships, please email You can see a template of a sponsorship subscription agreement here.

General Support

The best way to ask general questions about particular use cases is to email our support team at Our support team is trying our best to respond ASAP, but there is no guarantee on a response time unless your organization has a sponsorship subscription which includes Priority Support.

If you have a feature request or noticed lack of some documentation please feel free to create a GitHub issue. Our support team will answer it by replying to the issue or by updating the documentation.

Priority Support

In addition to the general support we provide a Priority Support with guaranteed response times included in all the paid sponsorships .

Severity Support Impact First Response Time SLA Hours How to Submit
1 Emergency (service is unavailable or completely unusable). 30 minutes 24x7 Please use urgent email address.
2 Highly Degraded (Important features unavailable or extremely slow; No acceptable workaround). 4 hours 24x5 Please use priority email address.
3 Medium Impact. 8 hours 24x5 Please use priority email address.
4 Low Impact. 24 hours 24x5 Please use regular support email address. Make sure to send the email from your corporate email.

24x5 means period of time from 9AM on Monday till 5PM on Friday in EST timezone.

Support Impact Definitions
  • Severity 1 - Your installation of Orchard is unavailable or completely unusable. An urgent issue can be filed and our On-Call Support Engineer will respond within 30 minutes. Example: Orchard Controller is showing 502 errors for all users.
  • Severity 2 - Orchard installation is Highly Degraded. Significant Business Impact. Important features are unavailable or extremely slowed, with no acceptable workaround.
  • Severity 3 - Something is preventing normal service operation. Some Business Impact. Important features of Tart or Orchard are unavailable or somewhat slowed, but a workaround is available.
  • Severity 4 - Questions or Clarifications around features or documentation. Minimal or no Business Impact. Information, an enhancement, or documentation clarification is requested, but there is no impact on the operation of Tart and/or Orchard.

How to submit a priority or an urgent issue

Once your organization signs the Sponsorship Subscription contract, members of your organization will get access to separate support emails specified in your subscription contract.