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Open-Source Licenses: Complete Legal Guide for Businesses 2025

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Introduction

Over 96% of business applications use open-source components, but how many organizations truly understand the legal implications of these licenses? As a freelance developer who has supported numerous companies in their digital projects, I've observed that misunderstanding open-source licenses represents one of the most underestimated legal risks in modern software development.

This guide details the main open-source licenses, their specific obligations, and best practices to secure your business projects. You'll learn how to confidently navigate the open-source ecosystem while respecting your commercial constraints.

Open-source licenses guide

Understanding the Open-Source License Ecosystem

What is an Open-Source License?

An open-source license is a legal contract that defines the conditions for using, modifying, and redistributing software. Contrary to common belief, "free" doesn't mean "without obligations."

According to the Open Source Initiative (OSI), an open-source license must respect 10 fundamental criteria:

  • Free redistribution
  • Source code access
  • Allowed modifications
  • Author's source code integrity
  • No discrimination against persons or groups
  • No discrimination against fields of endeavor
  • License distribution
  • License must not be specific to a product
  • License must not restrict other software
  • License must be technology-neutral

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