Here are some of the offerings from Voter-Science:
Voter-Management System & Door-to-Door Canvassing app (TRC)
https://start.voter-science.com
Data Hosting and Query Pages
VoterScience can host your large data set or SQL on the cloud and provide a convenient data query portal.
Contact us for details and pricing. See examples at https://blog.voter-science.com/2017/06/12/how-to-filter-lists/
Free Online Petition Pages
https://PetitionBuilder.org
Free recommendation-page maker
https://PetitionBuilder.org/slate/create
See for tutorial more details
Custom data modeling and analysis
blog.voter-science.com 