YASARA License Fees
YASARA license combines the best of 'open' and 'closed source' worlds:
charging for YASARA allows us to provide you with the fast and
effective support required in a production environment and to ensure
further developments. Making YASARA 'open source' and charging for
support only is not an option, because this creates an evolutionary
pressure towards a program that requires a lot of support - which is
against your interests. However, all YASARA add-ons (plugins, macros, movies) are licensed under
the GNU GPL , so that you can freely
share your work with others.
licenses: if you want to install YASARA on your PC and on your
notebook, that is fine as long as you are the only one to use it. If
YASARA is used on more than one PC and by more
person, you need to purchase a multiuser license. There are three
- Group leader license: this license costs twice the
amount of a single license and allows to install YASARA on an unlimited
number of computers belonging to one research group at a single location. Two email
addresses can be registered for support: one for the group leader and
one for the other group members.
- Multiple licenses: buying multiple licenses for N users
allows you to register N different email addresses for support. Use this
license if several independent scientists in one university or company
want to work with YASARA. Only the first master license comes with USB stick
and booklet, the others are for download only, unless you purchase an
extra USB stick+booklet for 20 € / 23 $. After the initial purchase, each license
is treated independently.
- Multiple group leader licenses: if multiple research groups
in one university or company want to use YASARA (possibly at different locations), this is the license of
choice. With N group leader licenses, you can register 2*N email
addresses for support and updates. Only the first master license comes
with USB stick and booklet, the others are
for download only, unless you purchase an extra USB stick+booklet for 20
After the initial purchase, each group leader license is treated
- Unlimited licenses: for all research groups at a university or pharmaceutical company,
possibly at different geographic locations, with discounted update and support extensions. Please contact us for details.
Academic and commercial licenses:
the price of the academic license is heavily subsidized to promote free
and open research at academic institutions. If you want to carry
out research with commercial interests, you need a commercial
license. This includes academic institutions engaged in patent
applications and extensive collaborations with pharmaceutical companies.
licenses: if you want to install YASARA as part of a web-server
so that it can be used freely by everyone, please contact
us for license details.
renewal: YASARA licenses are issued for a certain time period.
If you do not renew your license, you lose access to updates and
support. Academic and perpetual commercial YASARA licenses will continue to work as usual after
the support ended (if you downloaded an update after your payment arrived),
normal commercial versions will slow down and show a splash
screen. However, you will still be able to use all the functions (e.g.
to access data stored in a YASARA specific format and convert it).
Please contact us for more details on perpetual commercial licenses.
If you let your license expire and want to have YASARA support
and updates again some time later, you need to buy a new license
(but you get at least a 25% discount if you tell us).
changes: You can increase your YASARA license at any time (e.g.
from YASARA Dynamics to YASARA Structure, from single user to group leader
etc.). You will be charged with the price difference, but the elapsed
time of your license will be taken into account. Request an upgrade here.
price guarantee: we guarantee that the annual cost of your first
license renewal will be <=37.5% of the initial cost in the first
year. If you renew your license right now (i.e. select a license period
longer than one year), each additional year costs only 27.5% of the
is free of charge.
fee formula: the calculator above uses the following formula to
obtain the total cost of YASARA from the number of licenses N. For
group leader licenses, 'GroupLeaderLicense' is 1, and 0 otherwise:
TotalPrice = SinglePrice