When comparing Loomio vs Momentum, the Slant community recommends Momentum for most people. In the question“What are the best productivity web apps?” Momentum is ranked 11th while Loomio is ranked 15th.
Ranked in these QuestionsQuestion Ranking
Pro Supports a wide range of decision-making methods
Pro Free and open source
Licensed under GNU AGPLv3
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 Specifically designed for GTD
Pro Automated Next Steps
Next steps have a separate view. Tasks can be updated sequentially or parallel.
Pro Projects and Tasks can be endlessly nested
You can nest multiple projects with tasks, there is no limit.
Pro Has an offline mode
No permanent internet connection needed.
Web-based, progressive-web-app (PWA).
Pro Realtime synch
Data instantly updates on all devices.
Pro Clean design
Lots of space helps focus on the tasks.
Con Monthly fee for extra features
You generally must pay a monthly fee to support a group with additional features, integration options, and memberships cap increases (however, unfunded community organizations can apply to use it for free, and non-profits with a budget receive a discount.)
Con Beta interface is confusing for first-timers
The interface is very opinionated (this is a good thing). But it is not obvious how to map user's own GTD variant onto the one the author has in mind. Maybe after it is in production, there will be better on-boarding.