There are already a few other data portals, and some of them (unlike Socrata) are Open Source. CKAN - http://ckan.org http://ckan.org OpenDataCatalog - https:

There are already a few other data portals, and some of them (unlike Socrata) are Open Source. CKAN - http://ckan.org http://ckan.org OpenDataCatalog - https://github.com/azavea/Open-Data-Catalog/ https://github.com/azavea/Open-Data-Catalog/ Junar - http://www.junar.com/ http://www.junar.com/ DKAN - http://nucivic.com/dkan/ http://nucivic.com/dkan/ PublishMyData - http://www.swirrl.com/publishmydata http://www.swirrl.com/publishmydata CKAN in particular is used by a lot of National Governments ( http://ckan.org/instances/ http://ckan.org/instances/ ) , is Open Source, has a reasonably large developer community. It also isn't quite as expensive as some of the closed source commercial offerings. There are a few more but in various stages of completion/usefulness. Disclaimer: CKAN dev.