Prince License FAQ

Under what license is Prince offered?
There are several. The table below lists the different types and the key differences between them:
License typePriceWatermarkSpecial benefitsSpecial restrictions
Non-commercialfree! yesnon-commercial use only
Professional USD $495 nono server use
Server USD $3,800 noserver use allowedno commercial services allowed
Academic server USD $1,800 noserver use allowedacademic use only
OEM on requestno allows redistribution 
CSO ("Saas") on requestno allows commercial service offerings,
may be installed on any number of servers
tied to a certain domain

The EULA describes the licenses in a legal language. This document tries to answer frequently asked questions (FAQ) about the licenses in a common language.

Non-commercial License

Is the Prince Non-commercial License really free?
Can be used on a server?
What's the catch?
There's a logo in the upper right corner on the first page of the PDF file. You are not allowed to remove the logo (e.g., by removing the first page of the PDF file) or assist or encourage others to remove it.

Also, you must place prominent links to on your site, at the places the PDF documents are served and in a page listing your partners. If you send the PDF documents in email, the message body must contain our URL.

Does my organization qualify for the Non-commercial License?
The license doesn't try to distinguish between commercial and non-commercial organizations. Instead, it distinguishes between commercial and non-commercial purposes. This is the key sentence from the license:
"Non-commercial Purposes" means the production of documents (a) for which no fees are charged, and (b) which are not part of a monetary transaction system (such as, but not limited, to invoices and receipts), and (c) for which no other income (such as, but not limited to, subscription fees, income from advertising, or sale of consumables) is generated.
So, even commercial organizations can use the Non-commercial License as long as they use it for non-commercial purposes?
Correct. For example, a newspaper may offer PDF versions of their articles using the Non-commercial License; as long as the articles are offered at no cost without any advertising, the Non-commercial License can be used.
Can non-commercial organizations use the Non-commercial License for all sorts of purposes?
No. Non-commercial organizations can only use the Non-commercial License for non-commercial purposes. For example, they cannot use the Non-commercial License to generate documents for which they charge fees, nor can they use the non-commercial License to create invoices.
Can I use the Non-commercial License on my server, even if I have advertising on my site?
Yes, as long as the advertising doesn't appear in the generated PDF documents.
I don't have third-party advertising in the PDF documents I generate, but promotions for my own sites and services are inserted. Is is OK to use the Non-commercial License for this purpose?
Not if those other sites or services are of commercial nature. For example, you may not promote services for which you charge subscription fees. If in doubt, contact us.
I run a fee-based service and offer PDF documents as part of the service, but people do not pay extra for the PDF documents. Is it OK to use the Non-commercial License to generate these PDF documents?
Only if those PDF documents are also available to others without paying the fees.
Am I allowed to use the Non-commercial version to create printed books?
Only if those books are distributed for free, or at the cost of printing.
Why should I buy a license when you offer a free license?
There are three good reasons to buy a license:
  • you want to get rid of the watermark; all non-free licenses remove the watermark
  • you want to use Prince for commercial purposes; all non-free licenses can be used for commercial purposes (but some restrictions apply, see below)
  • you want to redistribute Prince as part of your own product (for this you need an OEM license)

A fourth reason would be to support our work. We are passionate about printing the web and license fees are our only income.

Professional License

Who uses the Prince Professional License?
Typically, the professional license is used by authors and publishers who needs to produce PDF documents from time to time.
What are the restrictions of the Professional License?
If you have a Professional License, you may install and use Prince on a single computer, and Prince must be started by a human sitting by that computer. So, you cannot use a Professional License on a server computer, and you cannot log into a remote computer to use the Professional license. Prince can be started either by typing the command line on the keyboard, or by clicking on the application and the files to be processed.
Are there any other restrictions?
Only the normal ones. Like, you cannot disassemble or redistribute Prince. See the EULA for the complete list.

Server License

Who uses the Prince Server License?
The Server License is used by those who want to run Prince in a server without seeing the watermark, and without the restrictions of the non-commercial license.
Compared to the Non-commercial License, what restrictions are removed in the Server License?
You may use the Server License for commercial purposes. For example, you can use the Server License to make invoices and receipts.
Is there something I cannot use a Server License for?
Yes, you may not use a Server License to create Commercial Service Offerings, i.e., services in which Prince forms a part and for which the fees are charged or other income is generated. For this you will need a CSO License.
I need to install Prince on a standby server which will only be used if the primary computer fails. Do I need to purchase another Server License for this?
No. If you have a Server License, we allow you to install Prince on three computers as long as only one computer is used as a production server at a time.
I need a machine for development purposes. Do I need to purchase a separate license for this?
No. If you have a Sever License, we allow you to install Prince on three computers as long as only one is used as a production server.
Do you offer discounts when purchasing multiple server licenses?
Yes. Here's our discount ladder:
copiesdiscountprice per server license
2 10%$3,420
3 20%$3,040
4 25%$2,850
5+ 30%$2,660
10+ 40%$2,280

Our electronic payment system will automatically calculate the discounts when the licenses are purchased simultaneously. If you purchase licenses at different times, contact us at

Academic Server License

What's the difference between a Prince Academic Server License and a normal Server License?
The Academic Server License can only be used for academic purposes. By this we mean the production of dissertations, papers, lecture notes, hand-outs and similar documents or publications of academic character for distribution on the Web, at lectures, or through university bookstores or similar academic channels that are not of a strictly commercial character. A university press run on commercial terms is considered to be strictly commercial.

OEM License

Who needs a Prince OEM License?
You need an OEM license if you want to redistribute Prince, e.g., as part of your own product.
How much does a Prince OEM license cost?
That depends. Prices are worked out on a case-by-case basis; the price and expected distribution of the application is taken into account. If you tell us more about your application — what it does, how many copies you expect to sell/distribute, and what you plan to charge — we will provide you with a price quote. You can contact us at
Are there any commercial services that use Prince out there?
Yes, DocRaptor

CSO License

What's a CSO License?
CSO stands for "Commercial Service Offerings". By this we mean a web-based service for which fees are charged or other income is generated, and where the generated PDF documents forms an significant part of the service. If you want to use Prince as part of a CSO, you will need a CSO license. For example, if you want to start an advertising-sponsored web-to-PDF service using Prince, you will need a CSO license.
So, software-as-a-service (SaaS) is a kind of CSO?
I'm planning to create a service where my customers pay to use Prince running on my servers. Do I need a CSO license for this?
I'm planning create commercial service where Prince only will be used to generate invoices and receipts? The documents are commercial. Do I need a CSO license to use Prince for this?
We allow invoices and recipts to be generated as long as they are issued by your own company. These document are not considered to be a significant part of your service, and the normal server license can therefore be used. However, if you, say, offer an invoice-generation service for others to use, you will need a CSO license.
I'm planning to create a commercial service where customers pay for information. They normally access this information in HTML, but I also offer PDF versions generated by Prince. Do I need a CSO license for this use?
If you charge your customers fees for accessing the information, or if you have other income from these documents (e.g., advertising), you will need a CSO license.
My company sells ink cartridges. We would like to build a free service so that users can generate PDF documents to be printed. Do I need a CSO license for this kind of use?
Yes, this is considered a commercial service offerings as you make money from selling consumables.
May I install a CSO license on more than one server?
Yes, you may install CSO licenses on any number of servers.
Can a CSO license serve any number of domains? For example, can I power both adn from the same CSO license?
No, CSO licenses are typically limited to serving one domain only.
How much does a CSO license cost?
That depends. Prices are worked out on a case-by-case basis; the nature and expected revenues of the CSO is taken into account. Typically, we charge annual fees for CSO licenses. If you consider creating a CSO in which Prince forms a part, please tell us more about what it does, what role Prince will have, and from which domain name the service will be offered. You can contact us at

Other questions

Are there any restrictions on what kind of computers Prince can be installed?
No. You can install Prince on any kind of computer. We only count computers, not memory, megahertz, processors or cores.
I want to use Prince in a server farm. Do you offer site licenses, or do I need to buy a separate license for each server?
We try to keep our license simple by counting only machines, not processors, gigahertz or memory. However, this means that our licenses are not so friendly towards server farms. Are you sure you need to use a server farm? Prince has been optimized and load-balancing may not be needed. If you still need a license for a server farm, please contact us.
How fast and reliable is your support?
Very. While we do not promise numbers in the EULA, we do our best and we're very good at what we do. The Prince Forum shows the quality and timeliness of the support we provide.
Why is the EULA governed by Norwegian law?
Because Norwegian law is no-nonsense and therefore allows for relatively simple contracts. Also, our lawyer happens to be based in Oslo.
In case of conflict, do I need to learn Norwegian?
We have never been in legal conflict with any of our customers. However, in case of conflict, proceedings shall be conducted in the English language.
Do you have a reseller program?
Not really. We typically sell directly to customers. In the past we have found that direct contact is the most efficient. However, we offer a discount ladder for resellers (and others):
copiesdiscountprice per Prince Server License
2 10%$3,420
3 20%$3,040
4 25%$2,850
5+ 30%$2,660

The discounts are automatically calculated when you order Prince from here.