I have a desktop application with a login where data users are loaded from a PostgreSQL database in a server on the web. This server has a website where the user can create an account and buy a license for the desktop application.Am I required to share the desktop application source code for free in order to use PostgreSQL? PostgreSQL license: https://www.postgresql.org/about/licence/
Can I use PostgreSQL on a server for users to access a desktop application without sharing my source code?
mit;bsd;web server;postgre sql
Assuming your desktop applications does not use any open source projects other than PostgreSQL, you are not required to release the source code of your desktop application. However, you are required to provide the following text along with your Desktop application.From https://www.postgresql.org/about/licence/:Portions Copyright (c) 1996-2017, The PostgreSQL Global Development  GroupPortions Copyright (c) 1994, The Regents of the University of  CaliforniaPermission to use, copy, modify, and distribute this software and its  documentation for any purpose, without fee, and without a written  agreement is hereby granted, provided that the above copyright notice  and this paragraph and the following two paragraphs appear in all  copies.IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY  FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,  INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND  ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE  PROVIDED HEREUNDER IS ON AN AS IS BASIS, AND THE UNIVERSITY OF  CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,  UPDATES, ENHANCEMENTS, OR MODIFICATIONS.Edit: If your desktop application doesn't include any PostgreSQL software (i.e. all PostgreSQL software is on the server side), then you are not required to give attribution or licensing information. It might be polite to mention your server is using it, but it is definitely not required in this scenario.