More details about Loomio can be found on its entry in the FSF's Free Software Directory: http://directory.fsf.org/wiki/Loomio
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Pro Developed by a thriving social enterprise
Loomio development is led by a group structured as a worker-owned cooperative company, which is part of Enspiral, a mutual aid network of other social enterprises. As a result, both the Loomio code and the cooperative's hosted instance at Loomio.org are being actively maintained and developed, with new features being planned and deployed regularly.
Pro Free and open source
Licensed under GNU AGPLv3
Con Monthly fee for extra features
You must pay a monthly fee to support a group with additional features, integration options, and memberships cap increases.