ArcGIS vs QGIS for government: when to use each one
At GEOSAT we have delivered 61 geographic information system projects for public and private organizations in Colombia. Along the way we have worked extensively with both ArcGIS and QGIS, and the question clients ask most is always the same: which one is better?
The honest answer: it depends on the context.
Licensing cost
The most obvious difference is the licensing model. ArcGIS Desktop (now ArcGIS Pro) requires an annual subscription that, for a small municipality, can represent a significant expense. QGIS is free and open-source software under the GPL license: download, install, and use it at no cost.
In projects with tight budgets—like those we execute in small Colombian municipalities—QGIS has allowed us to deliver complete solutions without compromising technical quality. However, when the client already has active ArcGIS licenses and trained staff, forcing a migration makes no sense.
Scalability and ecosystem
ArcGIS has a mature ecosystem: ArcGIS Online, ArcGIS Enterprise, Field Maps, Survey123, StoryMaps. Everything integrates natively and Esri provides direct technical support. For large organizations—like the City of Medellin or regional environmental authorities—this is a real advantage.
QGIS, on the other hand, has a growing ecosystem of plugins (over 1,800 in the official repository) and integrates seamlessly with PostGIS, GeoServer, and other open-source tools. The community is active and updates are frequent.
PostGIS integration
Here QGIS has a clear edge. The connection between QGIS and PostGIS is native, direct, and stable. We can run complex spatial queries, edit geometries directly in the database, and manage thousands of parcels without performance issues.
ArcGIS can connect to PostGIS, but the integration is not as smooth. ArcGIS works best with its own geodatabase (File GDB or Enterprise GDB on SQL Server or Oracle), which implies a more closed ecosystem.
In our cadastral projects with Terraes, the QGIS + PostGIS combination has been essential for maintaining flexibility and full control over the data.
Web service publishing
To publish geospatial data as WMS, WFS, or REST services, ArcGIS Server is a robust but expensive solution. GeoServer, the open-source alternative, works perfectly with QGIS and PostGIS and is what we use in most of our projects.
That said, ArcGIS Online lets you publish web layers in minutes without needing your own infrastructure, which is ideal for organizations without a dedicated IT team.
Support and training
Esri offers formal technical support, comprehensive documentation, and a network of distributors in Colombia. When something fails, there is a number to call.
With QGIS, support comes from the community, specialized consultants (like GEOSAT), or the official forums. For organizations that need a formal SLA, this can be a limitation.
In our experience, the learning curve for both tools is comparable. QGIS has greatly improved its interface in recent versions and for an experienced GIS analyst, the transition between both is smooth.
When we recommend ArcGIS
- The organization already has active licenses and trained personnel
- Integration with ArcGIS Online or Field Maps for fieldwork is required
- The project demands formal technical support with an SLA
- Direct compatibility with Esri enterprise geodatabases is needed
When we recommend QGIS
- The budget is limited and there are no existing licenses
- Native integration with PostGIS is needed
- The project requires deep customization or plugin development
- Technological independence and full data control are priorities
- Service publishing will be done with GeoServer
Our position
At GEOSAT we are not evangelists for any tool. We have delivered successful projects with both platforms. What we do advocate is that the choice should be based on the project's real needs, not ideological preferences.
In our 61 GIS projects we have learned that the tool is just that: a tool. What makes the difference is knowledge of the territory, data quality, and the ability to solve real problems with geospatial technology.
If you need guidance choosing the right tool for your project, contact us. We work with both and can help you make the best decision.