Is the Apache License viral?
Asked by: Prof. Ernest Schaefer | Last update: May 30, 2026Score: 4.9/5 (29 votes)
No, the Apache License (version 2.0) is not a "viral" license; it's a permissive license, meaning it doesn't force derivative works to be released under the same terms, allowing you to combine it with proprietary code and keep your new source code private. Unlike strong copyleft licenses (like the GPL) which have "viral" effects, Apache 2.0 lets you use, modify, and distribute software with minimal restrictions, requiring only attribution and keeping the original license notice intact.
Is the Apache License free for commercial use?
Developed by the Apache Software Foundation and introduced in 2004, the Apache 2.0 License is a is a permissive free software license. The license permits use of the software for any purpose, users are able to distribute it, to modify it, and to distribute modified versions of the software.
Is an Apache License good?
Although Apache-2 is sometimes seen as a license-of-choice by major proprietary software companies like Google, the license itself is actually well-written. It explicitly offers a patent clause to protect contributors and distributors from patent lawsuits from the copyright holder.
What is the most popular open-source license?
The most common open-source licenses include the MIT License, Apache License 2.0, GNU General Public License (GPL), GNU Lesser General Public License (LGPL), and the BSD licenses. These licenses define how software can be used, modified, and distributed, with varying levels of restrictions and requirements.
What does an Apache License mean?
The Apache software license gives users permission to reuse code for nearly any purpose, including using the code as part of proprietary software.
What Is The Apache License? - Next LVL Programming
Who uses the Apache License?
The ASF and its projects release their software products under the Apache License. The license is also used by many non-ASF projects.
What is Apache used for?
Apache is primarily used as a powerful, open-source web server to deliver website content over the internet, handling requests from browsers and sending back pages, images, and other files, but the "Apache" name also refers to the Apache Software Foundation (ASF) and its many other projects like Tomcat for Java applications, making it a versatile platform for various server and development needs. It's highly customizable, supporting many programming languages (PHP, Python, Java) and features like SSL encryption and load balancing through extensive modules, making it a core technology for everything from small blogs (WordPress) to large enterprise sites.
What are viral open source licenses?
“Viral Open Source License” means any license for software that is “open source” or “copyleft” as those terms are commonly understood in the software industry, including, without limitation, any software license that: (i) requires licensees to disclose or otherwise make available the source code for any software ...
What is the difference between MIT and Apache License?
What is the difference between Apache License 2.0 and MIT? MIT is a more permissive license than Apache 2.0. Basically, you can do whatever you want with MIT-licensed software, provided you add a copy of the original MIT license and copyright notice to it.
What is the most famous open-source software?
Linux is not only iconic open-source software but also one of the leading operating systems in the world. More and more individuals and companies are opting for it due to its strong security and rich features.
Can I sell products with an Apache License?
Absolutely -- subject to the terms of the Apache license, of course. You can give your modified code away for free, sell it, keep it to yourself, or whatever you like.
What is better than Apache?
What is better than an Apache server? Nginx (pronounced "engine-x") is often considered a more efficient alternative to Apache. Nginx excels in handling concurrent connections and static content, making it a preferred choice for scenarios where high performance and low memory usage are crucial.
Is Apache free to use?
Is Apache software really free to download? ¶ Yes. Over 200 Apache projects and 30 podlings provide software products that may be downloaded and used at no cost, including everything from the world-famous Apache HTTP Server, to Apache Hadoop, to Apache Lucene, to Apache OpenOffice, and many, many more.
What are the disadvantages of Apache?
Security: Security is the major concern associated with Apache web server. As it allows an individual to do modification in the configuration, it might cause serious security issue if not taken care of properly. Loss of permission: Having access to httpd. conf main server config file, user shouldn't use .
Is Apache still relevant today?
Proven in combat time and again, the Apache is the attack helicopter of choice for the U.S. Army and the defense forces of 18 Allies and partners around the world. In 2025, Boeing continues delivering for its global customers.
Can I copy code from an Apache License?
You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: You must give any other recipients of the Work or Derivative Works a copy of this License; and.
What are the disadvantages of Apache License?
Issue with Apache:
Apache License 2.0's patent termination clause, among other legal stipulations, causes a mismatch when mixing Apache-licensed code with software under older GPL licenses. This conflict can lead to legal headaches and require extensive code relabeling or license changes.
What are the four types of software licenses?
The four broad categories of software licenses are Proprietary, Open-Source (further split into Permissive and Copyleft), Public Domain, and Freeware/Shareware, dictating usage rights from highly restrictive (Proprietary) to completely free (Public Domain), with Open-Source offering source code access and usage rules, and Freeware/Shareware providing free or trial use but not necessarily source code.
Why is the MIT license so popular?
Over the years, the MIT License evolved and gained recognition for its simplicity and flexibility. Its permissive nature allows developers to use, modify, and distribute software under this license with minimal restrictions, making it a top choice for many open source projects.
What is the most strict open source license?
GNU General Public License (GPL)
The GPL is one of the most well-known open source licenses. It is considered a restrictive license, as it requires that any changes made to the code must be released under the same GPL license, and any software that uses the code must also be released under the same GPL license.
What is viral licensing?
Viral License means any license for Open Source Materials that requires, as a condition of use, modification and/or distribution of software subject to such license, that such software or other software combined and/or distributed with such software must be: (i) disclosed or distributed in source code form; (ii) ...
What is the Q public license?
The Q Public License (QPL) is a non-copyleft license, created by the company Trolltech for its free software edition of the Qt toolkit and framework. It was used until Qt 3.0, until version 4.0 was released under the Free Software Foundation's (FSF) GNU General Public License (GPL) version 2. Q Public License. Author.
What are the benefits of using Apache?
Advantages of Apache include flexibility with modular design, open-source nature backed by a large community, compatibility with various operating systems and programming languages, strong security through regular updates, and ease of configuration for hosting websites or applications.
How secure is Apache?
Since Apache, as a web server, hosts 25.5% of all the websites as of 2026, these flaws present a huge security problem to all sectors. As of now in 2026, nine vulnerabilities have already been discovered in Apache HTTP Server 2.4.