UCSF Chimera and UCSF ChimeraX are licensed commercially based on a non-exclusive, nontransferable, 3-year license. For-profit entities must execute a license agreement to gain access. The two programs are licensed separately from each other, and no free trial licenses are offered.
|** We apologize that due to current circumstances beyond our control (departmental and university-level staffing issues), commercial license query response times and processing may be slow.**|
Chimera vs. ChimeraX:
The capabilities of the two programs overlap significantly but not completely, and where features overlap, they may still differ in detail. Many people currently use both programs. However, if you are trying to choose between the two, here are some considerations. ChimeraX has much better performance with large structures, as well as other major advantages and completely new features. Perhaps most importantly, ChimeraX is under active development and includes a significant subset of Chimera features (with more to come, see the missing features list). Chimera, on the other hand, has effectively reached end-of-life, is no longer being developed, and is only updated for critical maintenance purposes. In addition, a few Chimera tools that rely on web services may stop working in the future because the infrastructure they depend on is obsolete (details...), whereas ChimeraX uses newer software frameworks that extend its life far into the future. For full lists of included tools and commands, see the User Guides: [Chimera] [ChimeraX].
Costs are based on the number of users per Company Site:
These non-refundable fees are assessed per site and do not include a company's affiliates or subsidiaries. Each company site, affiliate, or subsidiary must acquire a separate license. The licenses last for 3 years from the date of issuance.
Licenses are assigned to specific named individuals, rather than floating among a larger set of people. For a given user based at a given site, however, there are no restrictions on the number of downloads during the 3-year period of the license; the user could have installations on multiple computers and/or different versions of the program on the same computer (production release, different daily builds, etc.). It is possible to reassign the license to a different user if, for example, someone leaves the company, but we require notification (email@example.com) of changes in the assigned user (1-user) or primary user (6-user or unlimited users). For a 6-user license, the company is responsible for maintaining its own list of the assigned individuals and ensuring that the number does not exceed six, but we do not need notification unless the primary user is changed.
License Agreement Process:
Downloads are available for recent versions of the Windows and macOS operating systems and some Linux distributions; other versions may not be supported. Chimera and ChimeraX are graphics-intensive programs intended for local, interactive use. We do not provide support for using them on compute clusters or virtual machines, or for remote display or remote rendering (details...).