Unverified50% confidenceFactExact time
MPL (Mozilla Public License) is a weak copyleft license that requires modifications to MPL-licensed files to be contributed back under the same license, but permits combination with proprietary code.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe Mozilla Public License (MPL) only requires that modified portions be open-sourced, striking a balance between permissive and strict licenses.77% similarVerifiedCopyleft licenses (such as GPL, LGPL, and AGPL) require that derivative works be released under the same or compatible open-source licenses.72% similarUnverifiedCopyleft licenses require that any derivative works based on the original code must also be released under the same license terms, which is known as the "viral" property.68% similarUnverifiedThe GPL (GNU General Public License) sets the condition that anyone may freely use, modify, and distribute the code, but must release derivative works under the same license — the "Copyleft" mechanism.67% similarVerifiedIn 2023, HashiCorp changed Terraform's license from MPL 2.0 to BSL (Business Source License).64% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1001636API
curl https://kongchang.com/api/v1/knowledge/claims/1001636MCP
get_claim(id=1001636)