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What are the best 'copyleft' open-source licenses?

5

Options
Considered

6

User
Recs.

Apr 2, 2022

Last
Updated

5 Options Considered

Best 'copyleft' open-source licenses	Price	Last Updated
-- GPLv3	-	Apr 2, 2022
-- AGPL (Affero General Public License)	-	Apr 30, 2016
-- LGPL (GNU Lesser General Public License)	-	Apr 30, 2016
-- MPL (Mozilla Public License)	-	Apr 30, 2016
-- EUPL (European Union Public Licence)	-	Feb 3, 2017

GPLv3

AGPL (Affero General Public License)

Top Pro

Protects the author

The author of the software avoids any risk for how the software may be used by others. See More

Top Con

Cannot be sublicensed

Top Pro

Ensures source access

Designed to make sure users have the freedom to access source code. See More

Top Pro

Ensures that derivitave works are also protected by strong copyleft

Works extending the original must be licensed in a similar fashion to the AGPL, preserving and extending the user freedoms originally granted. See More

Top Pro

Protects user freedom in the cloud

Designed to ensure that end-users can access source code, even when applications run on remote web servers. See More

LGPL (GNU Lesser General Public License)

MPL (Mozilla Public License)

EUPL (European Union Public Licence)

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