Socrata
The commercial open-data platform behind many North American portals. A hosted catalogue is faster to launch and harder to leave than a self-run one.
How this list is decided. Membership is not a field an editor set: it is every published entry whose own text names Socrata, matched at build time, with the sentence printed under each row so you can judge the match yourself. 9 entries in 8 cities.
✔ Every published entry is checked against the public sources it cites before publication.
Where it appears in the atlas
The Socrata discovery API (api.us.socrata.com) returned HTTP 404 for this domain — the portal is CKAN, not Socrata.
The platform switch, from trade press: Boston moved off its Socrata-powered portal to a CKAN-based platform delivered through OpenGov, reachable at data.boston.gov, with a beta in March 2017.
Queried through the Socrata API on 7 August 2026.
The City of Dallas launched its open-data portal, now at dallasopendata.com, in November 2013 on the Socrata platform, publishing city records spanning 311 service requests, police incident data, budget data and permitting activity.
All counts computed from this dataset through the Socrata SoQL API on 19 August 2026.
202 datasets in the catalogue on 19 August 2026, counted through the Socrata discovery API: 142 of them, 70%, carry no licence field.
A Socrata site at data.miamigov.com holds 12 datasets, none carrying a licence and none updated since June 2022; the working catalogue is an Esri ArcGIS Hub run by the Department of Innovation and Technology's GIS team, whose most recent items carry metadata timestamps from 26 July 2026.
Rio publishes its open data through data.rio, an Esri ArcGIS Hub site run by the Instituto Pereira Passos rather than a CKAN or Socrata catalogue.
Socrata metadata names the licence as the Open Data Commons Public Domain Dedication and License, PDDL 1.0 — an actual dedication instrument, not merely an absence of terms.
Others in this group
The whole layer
Every standard, protocol and licence the atlas names, with the open-data licence ladder in one table: Standards & licences.