This video is a concise introduction to purpose and features of the site:
The platform has been deployed in partnership with the Kettering Foundation for over five years. Every Voice Engaged is planning to migrate it to open source as we complete a number of infrastructure upgrades. The transition to a full DevOps pipeline that's deployed on AWS is in the final stages of testing. A number of targeted enhancements that will improve participation in our democracy are in the pipeline.
You can help! Here's how, on the project page on DemocracyLab.