copyleft
Safeguard articles tagged "copyleft" — guides, analysis, and best practices for software supply chain and application security.
15 articles
Building an Open-Source License Compliance Program That Flags Copyleft Risk in CI
Software Freedom Conservancy's suit against Vizio is headed to trial in August 2026 — proof that copyleft violations are litigated, not theoretical.
How to Choose an Open Source License
Choosing a license for your project comes down to how much control you want over downstream use. This guide walks through the decision — permissive, weak copyleft, or strong copyleft.
Open Source License Comparison: MIT, Apache, BSD, GPL, and More
A side-by-side comparison of the major open-source licenses — MIT, BSD, Apache 2.0, MPL, LGPL, GPL, and AGPL — across permissions, conditions, copyleft strength, and patent handling.
Open Source License Compliance: Frequently Asked Questions
A clear FAQ on open-source license compliance in 2026 — permissive vs copyleft, SPDX identifiers, AGPL and SaaS, attribution obligations, license changes, and automated scanning.
What Is the AGPL License? The Network Copyleft, Explained
The GNU Affero GPL closes the SaaS loophole: it extends copyleft to software used over a network. Here is what AGPLv3 requires, why companies treat it cautiously, and what it means for you.
What Is Open Source License Compliance?
Open source license compliance is the practice of tracking every open source component you use and honoring the legal obligations of its license. Get it wrong and you risk lawsuits, forced code disclosure, or a blocked acquisition.
What Is the GPL License? Copyleft Explained
The GNU General Public License is the best-known copyleft license. This guide explains what it permits, its source-disclosure obligations, GPLv2 vs GPLv3, and what it means for your project.
Open Source License Compliance
Redis, Elasticsearch, and Terraform all changed licenses in the last three years. Here's how license compliance actually breaks, and how to catch it before you ship.
What is License Scanning
License scanning finds every open source license in your dependency tree before it becomes a legal or compliance problem — here's how it works and why it changed in 2024.
What Is License Contamination?
One GPL dependency in the wrong place can put your proprietary source code under copyleft obligations. How license contamination happens and how to prevent it.
GNU GPL Explained: Versions, Obligations, and Compatibility
GPLv2 vs GPLv3, what the copyleft obligation actually requires, why 'GPLv2 or later' matters, and which licenses you can and cannot combine with the GPL.
The GNU General Public License, Explained in Plain Terms
A GPL license explained without legal jargon: what copyleft actually requires, when it triggers, and what it means for a codebase that links against GPL-licensed code.